JP3934120B2 - Liquid filled vibration isolator and elastic partition membrane used in the liquid filled vibration isolator - Google Patents

Description

  The present invention relates to a first mounting tool, a cylindrical second mounting tool, a vibration isolating base that connects the second mounting tool and the first mounting tool and is made of a rubber-like elastic material, (2) A diaphragm which is attached to a fixture and forms a liquid enclosure chamber with the vibration isolator base; and the liquid enclosure chamber is divided into a first liquid chamber on the vibration isolator base side and a second liquid chamber on the diaphragm side. A partition for partitioning and an orifice for communicating the first liquid chamber and the second liquid chamber, wherein the partition restricts the amount of displacement of the elastic partition film and the elastic partition film from both sides thereof The present invention relates to a liquid-filled vibration isolator configured to include a member, and an elastic partition film used in the liquid-filled vibration isolator.

  The liquid-filled vibration isolator is provided between an automobile engine and a body frame, for example. When large amplitude vibration occurs due to the unevenness of the traveling road surface, the liquid flows between the two liquid chambers through the orifice, and the vibration is attenuated by the fluid flow effect. On the other hand, when a vibration with a small amplitude occurs, the liquid does not flow between the two liquid chambers, and the elastic partition film is reciprocally deformed to attenuate the vibration.

In this type of liquid-filled vibration isolator, abnormal noise is likely to occur when the elastic partition film collides with the lattice member. Therefore, conventionally, as disclosed in FIG. 4 of JP-A-6-221368, radial ribs are provided on the lattice member. Further, the elastic partition film can be positioned away from the lattice member.
JP-A-6-221368 (FIG. 4)

  However, according to the above-described conventional configuration, although the abnormal noise can be reduced to some extent, the collision noise when the elastic partition film collides with the rib of the lattice member cannot be avoided, and the abnormal noise is sufficiently reduced. There was a problem that could not.

  The present invention has been made to solve the above-described problems, and is a liquid-filled vibration isolator capable of sufficiently reducing abnormal noise, and an elastic partition used in the liquid-filled vibration isolator. The aim is to provide a membrane.

  In order to achieve this object, the liquid-filled vibration isolator according to claim 1 connects a first mounting tool, a cylindrical second mounting tool, and the second mounting tool and the first mounting tool. In addition, a vibration isolating base made of a rubber-like elastic material, a diaphragm attached to the second fixture to form a liquid sealing chamber between the vibration isolating base, and the liquid sealing chamber as the vibration isolating base. A partition body that partitions the first liquid chamber on the side and the second liquid chamber on the diaphragm side, and an orifice that allows the first liquid chamber and the second liquid chamber to communicate with each other, the partition body including an elastic partition film and And a pair of lattice members that regulate the amount of displacement of the elastic partition membrane from both sides thereof, and rib groups projecting from both sides of the elastic partition membrane, A plurality of first ribs and a plurality of second ribs mixed with each other are provided. The height of the first rib is set such that the top of the first rib is located away from the grid member, and the height of the second rib is set so that the top of the rib is in contact with the grid member. The rib width is set to be smaller than that of the first rib.

  The liquid-filled vibration isolator according to claim 2 is the liquid-filled vibration isolator according to claim 1, wherein the first rib is configured so that the predetermined number of lattice holes can surround the lattice holes. The second ribs are distributed on the surface of the elastic partition film.

  The liquid-filled vibration isolator according to claim 3 is the liquid-filled vibration isolator according to claim 2, wherein the lattice holes are arranged in a plurality of rows in the circumferential direction of the lattice member, and the plurality of first ribs are It is formed in an annular shape, and is configured to be able to abut against each of the lattice member portions on both sides of each lattice hole row in the radial direction of the lattice member, and the plurality of second ribs with respect to the axis of the elastic partition film They are arranged radially.

  The liquid-filled vibration isolator according to claim 4 is the liquid-filled vibration isolator according to claim 1, wherein the first rib and the second rib can surround the lattice holes for every predetermined number of lattice holes. It is arranged on the surface of the elastic partition membrane.

  The liquid-filled vibration isolator according to claim 5 comprises a first mounting tool, a cylindrical second mounting tool, the second mounting tool and the first mounting tool, and a rubber-like elastic material. An anti-vibration base, a diaphragm attached to the second fixture to form a liquid enclosure between the anti-vibration base, the liquid enclosure on the first anti-vibration base side and the first liquid chamber A partition that partitions the diaphragm into a second liquid chamber; and an orifice that allows the first liquid chamber and the second liquid chamber to communicate with each other. The partition houses the elastic partition film and the elastic partition film. A cylindrical portion and a pair of lattice members that regulate the amount of displacement of the elastic partition film in the cylindrical portion from both sides thereof, and one lattice member of the pair of lattice members, The elastic partition is provided integrally with the cylindrical portion between the inner peripheral surfaces of the cylindrical portion. A plurality of ribs that can surround the lattice holes are formed for each of a predetermined number of lattice holes on both surfaces of the membrane, and a plurality of auxiliary ribs are respectively arranged in a distributed manner. The height dimension is set so as to be located apart, the height of the auxiliary rib is set so that the top of the auxiliary rib abuts on the lattice member, and the rib width is set to be smaller than the rib. Yes.

  The liquid-filled vibration isolator according to claim 6 is the liquid-filled vibration isolator according to claim 5, wherein the lattice holes are arranged in a plurality of rows in the circumferential direction of the lattice member, and the plurality of ribs are annular. Formed so as to be able to abut against the lattice member portions on both sides of each lattice hole row in the radial direction of the lattice member, and the auxiliary ribs are arranged radially with respect to the axis of the elastic partition membrane. ing.

  The liquid-filled vibration isolator according to claim 7 comprises a first mounting tool, a cylindrical second mounting tool, the second mounting tool and the first mounting tool, and a rubber-like elastic material. An anti-vibration base, a diaphragm attached to the second fixture to form a liquid enclosure between the anti-vibration base, the liquid enclosure on the first anti-vibration base side and the first liquid chamber A partition that partitions the diaphragm into a second liquid chamber; and an orifice that allows the first liquid chamber and the second liquid chamber to communicate with each other, the partition including an elastic partition film and a displacement amount of the elastic partition film And a pair of lattice members that restrict both sides of the elastic partition film, the first displacement restricting protrusion protruding from one surface side of the elastic partition film, and the other surface side of the elastic partition film or Second displacement restriction projecting from the lattice member facing the other surface side Comprising a raised Prefecture, the first displacement-regulating protrusion against imaginary plane passing through the thickness direction center of the elastic partition membrane is disposed at a position where the second displacement-regulating protrusion and asymmetrical.

  The liquid-filled vibration isolator according to claim 8 is the liquid-filled vibration isolator according to claim 7, wherein the second displacement restricting protrusion protrudes from the other surface side of the elastic partition film. .

  The liquid-filled vibration isolator according to claim 9 is the liquid-filled vibration isolator according to claim 7 or 8, wherein at least a part of the second displacement restricting protrusion is in relation to an axis of the elastic partition film. And a plurality of the first displacement restricting projections are arranged at a substantially intermediate position between the pair of second displacement restricting projections arranged radially and adjacent to each other. Arranged radially with respect to the core.

  The liquid-filled vibration isolator according to claim 10 is the liquid-filled vibration isolator according to claim 8, wherein each of the first displacement restricting protrusion and the second displacement restricting protrusion is an axis of the elastic partition film. The first displacement restricting projections are arranged with a rotational angle of about π / n with respect to the second displacement restricting projections in the circumferential direction, and are arranged at substantially equal intervals in the circumferential direction. The first displacement restricting protrusion and the second displacement restricting protrusion have substantially the same protrusion height and protrusion width.

  In the liquid-filled vibration isolator according to claim 10, the fact that the displacement restricting protrusions are radially arranged “relative to the axis” means that they are radially arranged “from the axis toward the outside”. The above n “n” means an integer of 1 or more. Further, the above “π” means a circumference ratio (approximately 3.14), and the unit of “π / n rotation angle” is [rad].

  For example, an elastic partition film 115 (see FIG. 16) in a second embodiment to be described later has four first (n = 4) first and second displacement restricting protrusions 151a and 151b (n = 4) each at substantially equal intervals in the circumferential direction (90 degrees). The first displacement restricting protrusions 151a are arranged at an interval of 45 degrees (= π / 4 [rad]) with respect to the second displacement restricting protrusions 151b. .

  The liquid-filled type vibration damping device according to claim 11 is the liquid-filled type vibration-proof device according to any one of claims 7 to 10, wherein the first displacement regulating projection and the second displacement regulating projection have a top portion thereof. The height is configured to be able to contact the lattice member or the elastic partition film.

  The liquid-filled vibration isolator according to claim 12 is the liquid-filled vibration isolator according to any of claims 7 to 11, wherein the auxiliary is provided on each of the one surface side and the other surface side of the elastic partition film. A protrusion is provided, and the auxiliary protrusion is configured such that the protrusion height is lower than the first displacement restricting protrusion and the protrusion width is narrow.

  An elastic partition membrane according to a thirteenth aspect is used for the liquid-filled type vibration damping device according to any one of the first to twelfth aspects.

  According to the liquid-filled vibration isolator of claim 1, the plurality of first ribs have their tops separated from the lattice member, and the plurality of second ribs have their tops on either side of the elastic partition membrane. Can be brought into contact with the lattice member. As a result, when the elastic partition membrane moves toward the lattice member side due to vibration, the second rib becomes a resistance and the top portion of the first rib can be caused to gently collide with the lattice member surface. There is an effect that it can be sufficiently reduced.

  In addition, since the first rib and the second rib are mixed, and the second rib has a smaller width than the first rib and weakened in rigidity, it is possible to prevent the elastic partition film from reciprocating easily. There is an effect that can be done.

  According to the liquid-filled vibration isolator according to claim 2, in addition to the effect exhibited by the liquid-filled vibration isolator according to claim 1, the second ribs are distributed on the surface of the elastic partition film. There is an effect that it is possible to avoid that the resistance force of the second rib is concentrated on a part of the elastic partition film. Since the first rib is arranged on the surface of the elastic partition film so as to surround each of the predetermined number of lattice holes, the top of the first rib contacts the lattice member in a large amplitude vibration state. Since the first rib surrounds each of the predetermined number of lattice holes when they come into contact with each other, it is possible to prevent fluid from flowing between the predetermined number of lattice holes and another lattice hole. There is an effect that the vibration performance can be further improved.

  According to the liquid-filled vibration isolator of claim 3, in addition to the effect exhibited by the liquid-filled vibration isolator of claim 2, the top portion of the first rib contacts the lattice member in a large amplitude vibration state. When contacted, the plurality of first ribs surround each lattice hole row, and a lattice hole of an arbitrary lattice hole row and a lattice hole of another lattice hole row adjacent thereto Since the liquid can be prevented from flowing between the two, the vibration isolating performance can be further improved.

  In addition, since the second ribs are arranged radially with respect to the axis of the elastic partition film, there is an effect that the resistance force of the plurality of second ribs can be prevented from being concentrated on a part of the elastic partition film.

  According to the liquid-filled vibration isolator of the fourth invention, in addition to the effects exhibited by the liquid-filled vibration isolator of the first invention, the first rib and the second rib surround the lattice holes for each predetermined number of lattice holes. Since it is arranged on the surface of the elastic partition membrane as possible, in a large amplitude vibration state, when the top of the first rib contacts the lattice member, the first rib and the second rib have a predetermined number of lattice holes. Since each of these lattice holes is surrounded, it is possible to prevent a fluid from flowing between a predetermined number of lattice holes and another lattice hole, thereby improving the vibration isolation performance. There is an effect.

  According to the liquid-filled vibration isolator of claim 5, when the elastic partition membrane collides with the lattice member due to vibration, the rib serves as a cushion, and the elastic partition membrane gently collides with the lattice member. Therefore, there is an effect that abnormal noise can be reduced.

  In a large amplitude vibration state, when the top of the rib comes into contact with the lattice member, the rib surrounds the predetermined number of lattice holes. It is possible to avoid the liquid from flowing between the holes, and it is possible to prevent the vibration-proof performance from being lowered.

  In addition, since one of the pair of lattice members is integrally connected to the cylindrical portion between the inner peripheral surfaces of the cylindrical portions, for example, any of the lattice members is a member different from the cylindrical portion. Compared to the configuration, the posture of the lattice member with respect to the cylindrical portion (for example, the perpendicularity with respect to the axial center of the cylindrical portion) can be set accurately. Furthermore, the interval between the two lattice members when another lattice member is attached to the cylindrical portion can be set accurately, and the gap between the elastic partition film and the two lattice members can be set accurately. Therefore, this has an effect of improving the vibration isolation performance.

  Further, the plurality of ribs can have their top portions separated from the lattice member, and on either side of the elastic partition membrane, the plurality of auxiliary ribs can be brought into contact with the lattice member. As a result, when the elastic partition membrane moves toward the lattice member due to vibration, the auxiliary rib becomes a resistance, and the top portion of the rib can gently collide with the lattice member, so that the abnormal noise is sufficiently reduced. There is an effect that can be.

  In addition, since the auxiliary ribs are distributed on the surface of the elastic partition membrane, it is possible to prevent the resistance force of the plurality of auxiliary ribs from being concentrated on a part of the elastic partition membrane, and the auxiliary ribs have a smaller width than the ribs and are rigid. Therefore, there is an effect that it is possible to prevent the elastic partition film from becoming difficult to reciprocate.

  In a large amplitude vibration state, when the top of the rib comes into contact with the lattice member, the rib surrounds each of the predetermined number of lattice holes, so that the predetermined number of lattice holes are different from these. There is an effect that the fluid can be prevented from flowing between the lattice holes and the vibration isolation performance can be further improved.

  According to the liquid-filled vibration isolator according to claim 6, in addition to the effect exhibited by the liquid-filled vibration isolator according to claim 5, the top of the rib contacts the lattice member in a large amplitude vibration state. Sometimes, a plurality of ribs surround each lattice hole row for each lattice hole. Further, it is possible to avoid a liquid from flowing between a lattice hole of an arbitrary lattice hole row and a lattice hole of another lattice hole row adjacent to the lattice hole row, and to prevent a reduction in vibration isolation performance. There is.

  In addition, since the auxiliary ribs are arranged radially with respect to the axis of the elastic partition film, there is an effect that the resistance force of the plurality of auxiliary ribs can be prevented from being concentrated on a part of the elastic partition film.

  According to the liquid-filled type vibration isolator of the eighth aspect of the invention, the first displacement restricting protrusion protruding from the one surface side of the elastic partition film and the lattice member facing the other surface side or the other surface side of the elastic partition film are protruded. And a second displacement regulating projection provided. Therefore, when the elastic partition membrane is displaced toward the lattice member with large amplitude vibration, the displacement of the elastic partition membrane is regulated by the first or second displacement regulating projection arranged on the displacement direction side. Therefore, the collision between the elastic partition film and the lattice member can be suppressed, and the noise can be reduced.

  Furthermore, the first displacement restricting protrusion is provided so as to protrude at a position asymmetric with the second displacement restricting member on at least one surface side (one surface side) of the elastic partition film. Therefore, when the elastic partition film is displaced toward the lattice member on the second displacement restricting projection side with large amplitude vibration, the first displacement restricting projection provided on the opposite side to the displacement direction is the elastic partition. Since the rigidity of the membrane can be locally reinforced and the elastic partition membrane can be made difficult to displace, the contact between the elastic partition membrane and the lattice member can be suppressed accordingly, and noise can be further reduced. There is an effect that it can be planned.

  On the other hand, by disposing the first and second displacement restricting protrusions at positions that are asymmetric with each other as described above, the influence of one displacement restricting protrusion on the rigidity of the non-displacement restricting portion on the other displacement restricting protrusion side is further increased. Since it can be made small, there is an effect that the contact between the elastic partition film and the lattice member can be effectively suppressed while the rigidity of the entire elastic partition film is kept low. That is, there is an effect that it is possible to reduce abnormal noise at the time of large amplitude input while maintaining the low dynamic spring characteristic at the time of small amplitude input.

  Here, the degree of contribution to the generation of abnormal noise varies greatly depending on whether the contact point of the elastic partition membrane is the lattice member on the first liquid chamber side or the lattice member on the second liquid chamber side, as described above. If the first and second displacement restricting protrusions are arranged at positions that are asymmetric to each other, the rigidity ratio between the one surface side and the other surface side of the elastic partition film can be adjusted as appropriate. The rigidity of the elastic partition film as a whole is increased by increasing the rigidity and making it difficult for the elastic partition film to come into contact with the lattice member on the side that has a large contribution to the generation of abnormal noise, while reducing the rigidity of the other surface. Can be suppressed. As a result, there is an effect that it is possible to satisfy both conflicting demands of reducing abnormal noise when inputting large amplitude and maintaining low dynamic spring characteristics when inputting small amplitude.

  According to the liquid-filled vibration isolator according to claim 8, in addition to the effect exerted by the liquid-filled vibration isolator according to claim 7, the second displacement restricting protrusion protrudes from the other surface side of the elastic partition film. Therefore, it is possible to reduce the manufacturing cost associated with the formation of the second displacement restricting projection by eliminating the need for complicated processing on the lattice member, and accordingly, the product cost of the liquid-filled vibration isolator as a whole can be reduced. There is an effect that can be achieved.

  According to the liquid-filled vibration isolator according to claim 9, in addition to the effect exerted by the liquid-filled vibration isolator according to claim 7 or 8, at least a part of the first and second displacement regulating projections is an elastic partition. Since it is arranged radially with respect to the axis of the membrane, the elastic partition membrane is brought into contact with the lattice member while suppressing the increase in rigidity of the entire elastic partition membrane and maintaining low dynamic spring characteristics at the time of small amplitude input. This makes it difficult to reduce the abnormal noise when inputting a large amplitude.

  Furthermore, at least a part of the first displacement restricting protrusion is protruded at an intermediate position between the second displacement restricting protrusions, that is, a portion where the displacement amount of the elastic partition film is the largest and is most easily contacted with the lattice member. ing. Therefore, only the rigidity of the portion having the largest contribution rate to the generation of abnormal noise can be reinforced intensively by the first displacement restricting protrusion, so that the increase in rigidity of the entire elastic partition film is suppressed and large amplitude is input. There is an effect that the abnormal noise can be effectively reduced. As a result, while maintaining the low dynamic spring characteristics at the time of small amplitude input, it is difficult to make the elastic partition film come into contact with the lattice member and to reduce the abnormal noise at the time of large amplitude input. There is an effect that can be.

  According to the liquid-filled vibration isolator according to claim 10, in addition to the effect of the liquid-filled vibration isolator according to claim 8, each of the first and second displacement restricting protrusions has n radial and circumferential directions. Arranged at equal intervals, the first displacement restricting protrusions are displaced from the second displacement restricting protrusions in the circumferential direction by a rotation angle of approximately π / n. That is, each first displacement restricting protrusion is disposed at an intermediate position between adjacent second displacement restricting protrusions, and thus contributes to the generation of abnormal noise while suppressing an increase in rigidity of the entire elastic partition film as described above. Since only the rigidity of the part with a large ratio can be reinforced intensively, the conflicting requirement to reduce the abnormal noise at the time of large amplitude input while maintaining the low dynamic spring characteristic at the time of small amplitude input is high-order. There is an effect that can be compatible.

  Furthermore, since the first and second displacement restricting protrusions are configured to have substantially the same protrusion height and protrusion width, the rigidity of both surfaces of the elastic partition film can be made substantially the same. Therefore, in the assembly process of the liquid-filled vibration isolator, when incorporating the elastic partition membrane between the lattice members of the partition body, it is not necessary to identify the front and back of the elastic partition membrane, simplifying the assembly work, Accordingly, there is an effect that the work cost can be reduced.

  In addition, even if an operator or the like wrongly installs the back and front of the elastic partition membrane, the rigidity of the elastic partition membrane is the same on both sides, so there is an effect that the influence on abnormal noise can be minimized. .

  According to the liquid-filled vibration isolator according to claim 11, in addition to the effect exerted by the liquid-filled vibration isolator according to any one of claims 7 to 10, the first displacement restricting protrusion and the second displacement restricting protrusion are The top portion is configured to have a height capable of contacting the lattice member or the elastic partition membrane. That is, since there is no gap between each displacement restricting projection and the elastic partition membrane or the lattice member, when the elastic partition membrane is displaced toward the lattice member due to vibration, each displacement restricting projection is There is an effect that it is possible to avoid occurrence of abnormal noise in contact with the film or the lattice member.

  According to the liquid-filled vibration isolator according to claim 12, in addition to the effect exerted by the liquid-filled vibration isolator according to any one of claims 7 to 11, respectively on one side and the other side of the elastic partition membrane Since the protruding auxiliary protrusion is provided, even when the elastic partition film contacts the lattice member, the contact area with the lattice member can be reduced by bringing the top of the auxiliary protrusion into contact with the lattice member. Since the elastic partition film can be gently brought into contact with the lattice member by the buffering action of the auxiliary protrusions, there is an effect that noise can be reduced correspondingly.

  Furthermore, since the auxiliary protrusion is configured so that the protrusion height is lower than that of the first displacement restricting protrusion and the protrusion width is narrow, the rigidity of the elastic partition film as a whole is increased. There is an effect that it is possible to suppress and maintain the low dynamic spring characteristic at the time of small amplitude input.

    According to the liquid-filled vibration isolator of claim 14, the same effects as the elastic partition membrane used in the liquid-filled vibration isolator according to any one of claims 1 to 13 can be obtained.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a liquid-filled vibration isolator 100 according to the first embodiment.

  As shown in FIG. 1, the liquid-filled vibration isolator 100 includes a first mounting bracket 1 attached to an automobile engine, a cylindrical second mounting bracket 2 attached to a vehicle body frame below the engine, And an anti-vibration base 3 made of a rubber-like elastic body.

  As shown in FIG. 1, the first mounting bracket 1 is formed in a plate shape, and an upward mounting bolt 6 projects from the center of the first mounting bracket 1. The second mounting bracket 2 includes a cylindrical bracket 4 on which the vibration-proof base 3 is vulcanized and a cup-shaped bottom bracket 5, and a downward mounting bolt 6 projects from the center of the bottom bracket 5. Has been.

  The anti-vibration base 3 is formed in a truncated cone shape. As shown in FIG. 1, the upper end surface is vulcanized and bonded to the first mounting bracket 1, and the lower end portion is vulcanized and bonded to the upper end opening of the tubular bracket 4. An upper constricted hollow portion is formed on the lower surface portion of the vibration isolation base 3, and a rubber film 7 covering the inner peripheral surface of the cylindrical metal fitting 4 is connected to the lower end portion of the vibration isolation base 3.

  As shown in FIG. 1, a diaphragm 9 formed in a partial spherical shape from a rubber film is attached to the second mounting bracket 2, and a liquid enclosure chamber 8 is interposed between the diaphragm 9 and the lower surface of the vibration-isolating base 3. Is formed. A liquid is sealed in the liquid sealing chamber 8. The diaphragm 9 is covered with the bottom metal fitting 5.

  As shown in FIG. 1, the liquid enclosure chamber 8 is divided into a first liquid chamber 11A on the vibration isolating base 3 side and a second liquid chamber 11B on the diaphragm 9 side by a partition 12 (see FIGS. 10 and 11). It is partitioned. The partition 12 is sandwiched and fixed by a sandwiching member 14 provided on the inner peripheral side of the second mounting bracket 2 and the vibration isolation base 3.

  The partition body 12 includes an elastic partition film 15 configured in a disc shape from a rubber film, a cylindrical member 16 that accommodates the elastic partition film 15 and receives it by a lattice wall 18 on the inner peripheral surface side, and one end of the cylindrical member 16. And a lattice disc-shaped partition membrane displacement regulating member 17 that covers the opening on the part side (upper side in FIG. 1). That is, the lattice wall 18 and the partition membrane displacement regulating member 17 regulate the displacement amount of the elastic partition membrane 15 from both sides of the membrane 15.

  An orifice 25 is formed between the outer peripheral surface of the cylindrical member 16 and the inner peripheral surface of the second mounting bracket 2. Here, the orifice 25 will be described with reference to FIGS. The orifice 25 is an orifice flow path that allows the first liquid chamber 11A and the second liquid chamber 11B to communicate with each other (see FIG. 1). As shown in FIGS. 2 to 4, the orifice 25 is formed around the axis O of the cylindrical member 16. Around.

  That is, it is configured to include an orifice channel R1 for one upper circle and an orifice channel R2 for one week on the lower side. The upper and lower orifice channels R 1 and R 2 are partitioned by the orifice forming wall 22. Further, the upper orifice channel R1 communicates with the first liquid chamber 11A through the opening 19 (see FIG. 5) of the partition membrane displacement regulating member 17 and the notch 55. The lower orifice channel R2 communicates with the second liquid chamber 11B through the opening 58 (see FIG. 1) of the clamping member 14.

  Returning to FIG. As shown in FIG. 1, the clamping member 14 is pressed against the outer peripheral side flat plate portion 28, the first cylindrical portion 29 fitted into the lower end portion of the rubber film 7, and the other end portion of the cylindrical member 16 of the cylindrical member 16. The intermediate part side flat plate part 30 which acts, and the 2nd cylinder part 31 which fits in the opening part of the other end part side (FIG. 1 lower side) of the cylinder member 16 are comprised. The outer peripheral side flat plate portion 28 is caulked and fixed together with the mounting plate 10 of the diaphragm 9 and the bottom metal fitting 5 by folding back the lower end portion of the cylindrical metal fitting 4.

  Next, the partition film displacement regulating member 17 will be described with reference to FIGS. 5 and 6. As shown in FIGS. 5 and 6, the partition film displacement regulating member 17 includes a cylindrical portion 20 on the outer peripheral side thereof, and the cylindrical portion 20 is externally fitted to one end portion of the cylindrical member 16 (see FIG. 1). . Then, the upper end portion of the partition film displacement regulating member 17 is received by the stepped portion 57 of the vibration isolating base 3 in the axial direction of the cylindrical member 16 (see FIG. 1).

  As shown in FIGS. 5 and 6, the lattice holes 54 of the partition membrane displacement regulating member 17 include a center-side lattice hole 54 </ b> C and lattice holes 54 </ b> A and 54 </ b> B arranged in two rows in the circumferential direction of the partition membrane displacement regulating member 17. It is configured with.

  The number of lattice holes 54A in the inner row is four, and the number of lattice holes 54B in the outer row is eight. As shown in FIG. 5, it arrange | positions for every equal angle (90 degree | times or 45 degree | times). Then, the lattice holes 54A in the inner row are aligned with the lattice holes 54B in every 45 degrees in the outer row in the circumferential direction.

  As shown in FIG. 5, the shape of the lattice hole array is a shape formed by radially dividing annular holes along the circumferential direction. As described above, the opening 19 is an opening that allows the first liquid chamber 11A and the orifice 25 to communicate with each other.

  The lattice hole 54 of the lattice wall 18 is also configured to include a lattice hole 54C on the center side and lattice holes 54A and 54B arranged in two rows in the circumferential direction of the lattice wall 18 (see FIGS. 2 to 4). ). The pattern (number, shape, position of the lattice wall 18 around the axis O, etc.) is the same as the pattern on the partition film displacement regulating member 17 side.

  However, the cylindrical portion 20 of the partition film displacement restricting member 17 is formed on the cylindrical member 16 so that the lattice holes 54A and 54B of the lattice wall 18 and the lattice holes 54A and 54B of the partition film displacement restricting member 17 are displaced in the circumferential direction. It is fitted externally (see FIG. 10). The positions of the lattice holes 54C on the center side are the same.

  Next, the elastic partition film 15 will be described with reference to FIGS. As shown in FIGS. 7 to 9, rib groups 50 are respectively provided on both surfaces of the elastic partition film 15. The pattern of the rib group 50 on one side is the same as the pattern of the rib group 50 on the other side.

  The rib group 50 includes a plurality of first ribs 51 and a plurality of second ribs 52.

  As shown in FIG. 7, the plurality of first ribs 51 are formed in an annular shape with respect to the axis P of the elastic partition film 15, and the top portion thereof is separated from the lattice wall 18 (or the partition film displacement regulating member 17). The height dimension is set so as to be positioned (see FIG. 11). That is, in a steady state where no hydraulic pressure acts, a gap of a predetermined dimension is formed between the top of the first rib 51 and the lattice wall 18 (or the partition film displacement regulating member 17).

  In addition, “the top portion of the first rib is located away from the lattice member” described in claim 1 or 6 means that the height dimension of the first rib has the gap in the steady state. That is, it is set. Therefore, even when the elastic partition membrane is displaced due to the action of hydraulic pressure, it does not require that “the top portion of the first rib is located apart from the lattice member”.

  When the elastic partition film 15 is displaced due to the action of hydraulic pressure, the plurality of first ribs 51 are arranged on both sides of each lattice hole array in the radial direction of the lattice wall 18 (or the partition film displacement regulating member 17). It is configured to be able to abut against the lattice member portion 53 (see FIGS. 2 and 5). Accordingly, the plurality of first ribs 51 surround the lattice holes 54 for each of the rows (inner row, outer row).

  Note that “the first rib is arranged so as to be able to surround the lattice hole” described in claim 2 or 5 means that the first rib 51 abuts on the lattice member portion 53 as described above. In this case, the first rib 51 surrounds the lattice hole 54. Therefore, it does not require that “the lattice holes are surrounded by the first ribs” even in a steady state where no hydraulic pressure is applied.

  The second ribs 52 are distributed over the entire surface of the elastic partition film 15. Specifically, as shown in FIG. 7, the elastic partition films 15 are arranged radially with respect to the axis P.

  The height of the second rib 52 is set so that the top of the second rib 52 abuts against the lattice wall 18 (or the partition film displacement regulating member 17), and the second rib 52 has a smaller rib width than the first rib 51. Is set.

  That is, as shown in the enlarged view of FIG. 9, in the assembled state, the second rib 52 on one surface of the elastic partition membrane 15 makes its top abut against the partition membrane displacement regulating member 17, and The second rib 52 abuts the top of the second rib 52 against the lattice wall 18.

  As described above, the plurality of first ribs 51 and the plurality of second ribs 52 are mixed with each other.

  The present invention has been described based on the first embodiment. However, the present invention is not limited to the first embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention. This can be easily guessed.

  [1] In the first embodiment, the plurality of first ribs 51 are configured to be able to surround them for each of the plurality of lattice holes 54, but are configured to be able to surround them for each of the lattice holes 54. May be.

  That is, the rib group 50 includes a plurality of first ribs 51 that can surround each lattice hole 54 and a plurality of second ribs 52 that are distributed on the surface of the elastic partition film 15. It may be configured. In this case, as described in [4] below, the pattern of the second rib 52 may be a pattern other than a radial pattern.

  [2] In the first embodiment, only the first ribs 51 of the elastic partition film 15 surround the predetermined number of lattice holes 54. Instead of this, for example, the first ribs 51 and the second ribs are used. The predetermined number (one or a plurality) of lattice holes 54 may be surrounded by a rectangular frame-shaped rib formed from 52. In this case, the two horizontal sides of the square frame can be set as the first rib 51, and the two vertical sides can be set as the second rib 52.

  [3] The present invention can be applied even when the first rib 51 and the second rib 52 do not surround the lattice hole 54.

  [4] The pattern of the lattice holes 54 and the pattern of the first ribs 51 and the second ribs 52 are not limited to the patterns of the first embodiment, and other patterns can naturally be applied to the present invention. is there.

  Next, a second embodiment will be described with reference to FIGS. In the first embodiment, the rib groups 50 are arranged symmetrically on both surfaces of the elastic partition film 15, whereas in the second embodiment, the first and second displacement regulating protrusions 151 a and 151 b are formed of the elastic partition film 115. They are arranged asymmetrically with respect to a virtual plane F passing through the center in the thickness direction. In addition, the same code | symbol is attached | subjected to the part same as the above-mentioned 1st Example, and the description is abbreviate | omitted.

  FIG. 12 is a longitudinal sectional view of a liquid filled type vibration damping device 200 according to the second embodiment of the present invention. As in the first embodiment, the liquid-filled vibration isolator 200 includes a first mounting bracket 101 that is mounted on the engine side of the automobile, a cylindrical second mounting bracket 102 that is mounted on the body frame below the engine, The first and second mounting brackets 101 and 102 are connected to each other and a vibration-proof base 103 made of a rubber-like elastic body is provided.

  The first mounting bracket 101 is formed in a cylindrical shape, and as shown in FIG. 12, a female thread portion 101a is recessed in the upper end surface. Similar to the first embodiment, the second mounting bracket 102 includes a cylindrical bracket 104 on which the vibration-proof base 103 is vulcanized and a cup-shaped bottom bracket 105. Note that the bottom of the bottom metal fitting 105 is inclined.

  The anti-vibration base 103 is formed in a truncated cone shape as in the first embodiment, and is vulcanized and bonded between the first mounting fitting 101 and the cylindrical fitting 104. Further, a rubber film 107 covering the inner peripheral surface of the cylindrical metal fitting 104 is connected to the lower end portion of the vibration isolating base 103.

  As in the first embodiment, a diaphragm 9 is attached to the second mounting bracket 102, and a liquid sealing chamber 8 is formed between the diaphragm 9 and the lower surface of the vibration-proof base 103. The liquid sealing chamber 8 is partitioned by a partition 112 into a first liquid chamber 11A on the vibration isolation base 103 side and a second liquid chamber 11B on the diaphragm 9 side.

  The diaphragm 9 has its mounting plate 10 fixed by caulking to the second mounting bracket 102, and the partition 112 is clamped and fixed between the diaphragm 9 and the stepped portion 57 of the vibration isolation base 103.

  The partition body 112 includes an elastic partition film 115 configured in a disc shape from a rubber film, a cylindrical member 116 that accommodates the elastic partition film 115 and receives it by a lattice wall 118 on the inner peripheral surface side, and a bottom of the cylindrical member 116. And a lattice disc-shaped partition film displacement regulating member 117 fitted in the opening on the side (the lower side in FIG. 1).

  As described above, the lattice wall 118 and the partition membrane displacement regulating member 117 are arranged to face each other with a predetermined interval therebetween, so that the displacement amount of the elastic partition membrane 15 is increased from both the upper and lower sides as in the first embodiment. It is regulated.

  Between the outer peripheral surface of the cylindrical member 116 and the rubber film 107 covering the inner peripheral surface of the second mounting bracket 102, an orifice 125 for communicating the first liquid chamber 11 </ b> A and the second liquid chamber 11 </ b> B is an axis of the cylindrical member 116. It is formed so as to make one round around the core Q.

  In the second embodiment, the outer peripheral portion of the elastic partition film 115 is sandwiched between the lattice wall 118 and the partition film displacement regulating member 117 without any gap, and the first liquid chamber 11A through the lattice hole 154 to be described later. And the communication between the second liquid chamber 11B are completely blocked. Therefore, the liquid in the liquid sealing chamber 8 flows between the first liquid chamber 11A and the second liquid chamber 11B only through the orifice 125.

  Next, with reference to FIGS. 13 and 14, the cylindrical member 116 constituting the partition 112 will be described.

  As shown in FIGS. 13 and 14, the cylindrical member 116 is formed in a cylindrical shape having an axis Q. At the upper and lower ends in the axial direction of the cylindrical member 116, a substantially flange-shaped orifice forming wall 122 is projected, and an orifice channel R <b> 1 is formed between opposing surfaces of the orifice forming wall 122.

  Notches 155 and 158 are formed in the upper and lower orifice forming walls 122, respectively, and the orifice channel R1 communicates with the first liquid chamber 11A via the notch 155, while via the notch 158. To communicate with the second liquid chamber 11B.

  As shown in FIGS. 13 and 14, a lattice wall 118 is formed on the inner peripheral side of the cylindrical member 116, and lattice holes 154 are formed in the lattice wall 118. The lattice hole 154 includes three rows of lattice holes 154 </ b> A to 154 </ b> C arranged in the circumferential direction of the lattice wall 118.

  As shown in FIG. 13, the number of each of the lattice holes 154A to 154C is six in the inner row (lattice hole 154A), eight in the middle row (lattice hole 154B), and in the outer row (lattice hole 154C). Four of them are arranged at equal intervals in the circumferential direction (60 degrees, 45 degrees, and 90 degrees in order from the inner row).

  As shown in FIG. 13, the shape of each lattice hole row is such that the inner row is a shape in which arc-shaped lattice holes 154A are arranged in the circumferential direction, and the middle and outer rows are annular holes along the circumferential direction. It is the shape which divides | segments radially. The width of the lattice hole 154B is substantially the same as the diameter of the lattice hole 154A and is configured to be wider than the width of the lattice hole 154C.

  Next, the partition film displacement regulating member 117 constituting the partition body 112 will be described with reference to FIG.

  The partition film displacement regulating member 117 is formed in a disk shape having an axis S as shown in FIGS. The partition body 112 is assembled by fitting the partition film displacement regulating member 117 on the inner peripheral side of the cylindrical member 116 (see FIG. 12). In this case, the partition membrane displacement regulating member 117 is positioned by engaging the upper end of the partition membrane displacement regulating member 117 with a step (see FIG. 14) formed on the inner peripheral side of the cylindrical member 116. Is called.

  As shown in FIG. 15, the partition film displacement regulating member 117 includes three rows of lattice holes 154 </ b> A to 154 </ b> C arranged in the circumferential direction. Since the pattern (number, shape, position around the axis S, etc.) of each of the lattice holes 154A to 154C is the same as the pattern on the lattice wall 118 side, description thereof is omitted.

  In the assembled state of the partition 112 (see FIG. 12), the positional relationship in the circumferential direction of the partition film displacement regulating member 117 with respect to the lattice wall 118 is not particularly limited. That is, the circumferential positions of the lattice holes 154A to 154C on the partition film displacement regulating member 117 side may be displaced in the circumferential direction with respect to the lattice holes 154A to 154C on the lattice wall 118 side, or It may coincide with the circumferential direction.

  Next, the elastic partition film 115 will be described with reference to FIGS. 16 and 17.

  As shown in FIGS. 16 and 17, the elastic partition film 115 includes a first displacement restricting protrusion 151a and a first auxiliary protrusion 152a protruding from one surface side, and a second displacement restricting protrusion protruding from the other surface side. 151b and a second auxiliary projection 152b.

  The first and second displacement restricting protrusions 151a and 151b are rib-shaped protrusions having the same protrusion height and protrusion width, and as shown in FIG. 16, the axis T of the elastic partition film 115 is formed. Four pieces are extended in a radial straight line from the outside to the outside.

  As shown in FIG. 16, the first and second displacement restricting protrusions 151a and 151b are arranged at equal intervals (90 degree intervals) in the circumferential direction, and the first displacement restricting protrusion 151a on one surface side is arranged on the other surface side. The second displacement restricting protrusion 151b is arranged so as to be shifted in the circumferential direction by a predetermined rotation angle. Therefore, the first displacement restricting protrusion 151a is disposed at a position that is asymmetric with respect to the second displacement restricting protrusion 151b with respect to the virtual plane F.

  The virtual plane F, as shown in FIG. 17, passes through the center in the thickness direction of the elastic partition film 115 (film portions on which the displacement restriction and auxiliary protrusions 151a, 151b, 152a, and 152b project), and In other words, it refers to a virtual plane orthogonal to the axis T of the elastic partition film 115.

  For example, in the present embodiment, the projection heights of the first and second displacement regulating projections 151a and 151b are configured to be the same, so that the virtual plane F is the first in the cross-sectional shape including the axis T (FIG. 17). It is parallel to both surfaces of the plane connecting the tops of the displacement restricting protrusions 151a and the plane connecting the tops of the second displacement restricting protrusions 151b.

  Here, the rotation angle at which the first displacement restricting protrusion 151a on the one surface side is shifted in the circumferential direction with respect to the second displacement restricting protrusion 151b on the other surface side is set to 45 degrees. Therefore, the first displacement restricting protrusions 151a (or the second displacement restricting protrusions 151b) have a pair of second displacement restricting protrusions 151b (or in the plan view of the elastic partition film 115 shown in FIG. 16A or 16C). The first displacement regulating protrusion 151a) is disposed at an intermediate position between adjacent ones.

  Further, the projection heights of the first and second displacement regulating projections 151a and 151b are substantially the same as the height of the outer peripheral portion of the elastic partition film 115 as shown in FIG. Therefore, the tops of the first and second displacement restricting protrusions 151a and 151b are in contact with the partition film displacement restricting member 117 or the lattice wall 118 in the assembled state of the partition 112 (see FIG. 12).

  On the other hand, the first and second auxiliary protrusions 152a and 152b are rib-shaped protrusions having the same protrusion height and protrusion width, and as shown in FIG. 16, the axis of the elastic partition film 115 is formed. A radial portion and an annular portion are formed in combination with T.

  Further, as shown in FIG. 16, the first and second auxiliary protrusions 152a and 152b have a protrusion width smaller than that of the first and second displacement restricting protrusions 151a and 151b, and as shown in FIG. The projection height is set lower than that of the first and second displacement regulating projections 151a and 151b.

  Next, the results of the abnormal noise evaluation test will be described with reference to FIGS.

  The abnormal noise evaluation test is a test for measuring an abnormal noise generated when a vibration having a relatively large amplitude such as cranking vibration is input. The liquid filled vibration isolator 200 in the second embodiment is used. Abnormal noise was measured while changing the shape of the elastic partition film 115 in various ways.

  Specifically, the three types of elastic partition membranes shown in FIG. 18 (hereinafter referred to as “Comparative Examples 1 to 3”) and the three types of elastic partition membranes shown in FIG. The noise was measured for a total of six types of elastic partition membranes.

  In FIG. 18 and FIG. 19, the first and second displacement restricting protrusions are illustrated with hatching and the first and second auxiliary protrusions are not illustrated for easy understanding.

  Here, the difference between Comparative Examples 1 to 3 and Inventions 1 to 3 is only that the shapes of the first and second displacement regulating projections are different, and other shapes and characteristics (thickness dimension of elastic partition film and rubber). Hardness etc.) are all the same.

  As shown in FIGS. 18 and 19, in Comparative Examples 1 to 3, the displacement restriction projection on one surface is displaced against the virtual plane F passing through the center of the elastic partition film in the thickness direction. It arrange | positions symmetrically with protrusion and this invention 1-3 is arrange | positioned asymmetrically. The present invention 2 corresponds to the elastic partition film 115 described in the second embodiment.

  FIG. 20 is a diagram showing the results of abnormal noise evaluation tests of Comparative Examples 1 to 3 and Inventions 1 to 3, and the vertical axis represents a predetermined vibration (frequency: 15 Hz) from the engine side (first mounting bracket 101 side). , Amplitude: ± 1 mm) is input, the acceleration value output from the body frame side (second mounting bracket 102 side) is shown as an abnormal sound index. The horizontal axis represents the dynamic spring value at idling (frequency: 30 Hz, amplitude: ± 0.05 mm).

  Here, the liquid filled type vibration isolator 200 includes a low dynamic spring at the time of small amplitude input at idling (generally, frequency: 20 Hz to 40 Hz, amplitude: ± 0.05 mm to ± 0.1 mm), It is required to satisfy both of two characteristics of noise reduction when inputting a large amplitude such as cranking vibration (generally, frequency: 10 Hz to 20 Hz, amplitude: ± 1 mm to ± 2 mm). Therefore, as an abnormal noise evaluation test, it can be said that the lower left region where the abnormal noise index is good and the idling dynamic spring value is low in FIG.

  When the measured values in FIG. 20 are compared, the first to third embodiments of the present invention increase the restraint area of the elastic partition film by the first and second displacement regulating projections as in the first to third comparative examples (FIGS. 18 and 19). Since the rigidity of the elastic partition membrane is increased, the abnormal sound index is good, but the elastic partition membrane is difficult to move, and thus the idling dynamic spring value tends to deteriorate.

  However, as shown in FIG. 20, the first to third aspects of the present invention can improve the abnormal noise index as long as the idling dynamic spring values are equivalent as compared with the first to third comparative examples. It was confirmed that the idling dynamic spring value can be lowered if the sound index values are the same. As described later, this is due to the fact that the displacement regulating projections on one side are asymmetrically arranged with respect to the displacement regulating projections on the other side.

  For example, according to the second aspect of the present invention, the first and second displacement restricting protrusions 151a and 151b are displaced from each other in the circumferential direction with respect to the comparative example 1 (that is, a virtual plane that passes through the center in the thickness direction of the elastic partition film 115). Compared to these, the present invention 2 has an approximately 60% abnormal noise index while ensuring the idling dynamic spring value equivalent to that of the first comparative example. It can be confirmed that this reduction can be achieved.

  Next, with reference to FIG. 21 to FIG. 23, a description will be given of a comparison of the manner in which the elastic partition membranes of Comparative Example 1 and Invention 2 described above are displaced when a large amplitude is input. In FIGS. 21 to 23, the auxiliary protrusions 152a and 152b are not shown.

  As shown in FIG. 22A, the elastic partition membrane of Comparative Example 1 has first and second displacement restricting projections 151a and 151b arranged symmetrically on one surface and the other surface. When the hydraulic pressure fluctuation is transmitted to the elastic partition membrane through the lattice holes 154 (not shown) by the large amplitude input, as shown in FIG. 22 (b) or FIG. 22 (c), the hydraulic pressure direction The elastic partition membrane is displaced in the direction of the arrow X or the arrow Y, that is, in the direction from the large hydraulic pressure side to the small side.

  In this case, the elastic partition film of Comparative Example 1 is displaced in its non-displacement restricting portion (part where displacement in the hydraulic pressure direction is not restrained by the first and second displacement restricting protrusions 151a and 151b), and particularly the most rigid. A small amount of displacement at a substantially intermediate position is maximized. As a result, as shown in FIG. 22 (b) or FIG. 22 (c), a substantially intermediate position portion of the non-displacement restricting portion collides with the partition film displacement restricting member 17 or the lattice wall 18, and noise is generated.

  On the other hand, in the elastic partition membrane of the second aspect of the present invention, as shown in FIG. 23A, the first displacement restricting protrusion 151a on one surface is asymmetric with respect to the second displacement restricting protrusion 151b on the other surface. It is arranged at the position. More specifically, the first displacement regulating projection 151a (or the second displacement regulating projection 151b) is an intermediate position between the second displacement regulating projections 151b (or the first displacement regulating projections 151a), that is, the displacement of the elastic partition film. The protrusion is provided on the opposite surface side of the portion where the amount becomes the largest and is most easily contacted with the lattice member.

  Therefore, in the elastic partition membrane of the second aspect of the present invention, even if the elastic partition membrane is displaced toward the hydraulic pressure direction (arrow X or arrow Y direction) by large amplitude input, FIG. As shown in c), the rigidity of the intermediate position portion of the non-displacement restricting portion, that is, the portion having the largest contribution rate to the occurrence of abnormal noise is reinforced intensively by the first or second displacement restricting protrusions 151a and 151b. Therefore, while suppressing an increase in the rigidity of the elastic partition membrane as a whole, it is difficult to displace the intermediate position portion of the non-displacement restricting portion, thereby effectively reducing abnormal noise during large amplitude input.

  As a result, according to the elastic partition membrane of the second aspect of the present invention, the elastic partition membrane is reinforced while intensively reinforcing only the rigidity of the portion necessary for noise reduction and maintaining the low dynamic spring characteristics at the time of small amplitude input. It is possible to make the two conflicting demands of reducing the abnormal noise at the time of inputting a large amplitude effectively higher order.

  The present invention has been described based on the second embodiment. However, the present invention is not limited to the second embodiment, and various modifications can be made without departing from the spirit of the present invention. This can be easily guessed.

  For example, in the second embodiment, for example, the case where the four first displacement restricting protrusions 151a are formed in a radial straight line shape outward from the axis T is described. However, the number is not necessarily limited to this number. Of course, it is possible to set the number to 3 or less, or 5 or more. The same applies to the number of second displacement restricting protrusions 151b.

  In the second embodiment, the case where the first and second displacement restricting protrusions 151a and 151b are arranged radially with respect to the axis T of the elastic partition film 115 has been described. However, the present invention is not necessarily limited to this pattern. It is naturally possible to apply other patterns.

  Examples of the other patterns include a pattern arranged in an annular shape with respect to the axis T, and a pattern arranged in a combination of radial and annular shapes. Further, the radial shape does not necessarily need to be a straight line, and may be, for example, a spiral curve. On the other hand, the term “annular” does not necessarily need to be a perfect circle and includes an elliptical shape and a polygonal shape.

  In the second embodiment, the first and second displacement restricting projections 151a and 151b are both protruded from the elastic partition film 115. However, both the displacement restricting protrusions 151a and 151b are not necessarily provided as the elastic partition film 115. It is not necessary to project from at least one, if at least one displacement regulating projection 151a, 151b is provided on one surface of the elastic partition film 115 and the both displacement regulating projections 151a, 151b are arranged asymmetrically with each other, Naturally, the displacement restricting protrusions 151b and 151a can be provided so as to protrude from the partition film displacement restricting member 117 or the lattice wall 118.

  In the second embodiment, the case where the first and second auxiliary protrusions 152a and 152b are protruded from the elastic partition film 115 has been described. However, it is not always necessary to protrude the first and second auxiliary protrusions 152a and 152b. Of course, it is possible to omit one or both of the auxiliary protrusions 152a and 152b.

  When the protrusion of the first and second auxiliary protrusions 152a and 152b is omitted, the elastic partition film 115 has a non-displacement restricting portion (a portion where the first and second displacement restricting protrusions 151a and 151b are not provided) on the surface. You may give a texture. Needless to say, the surface of the first and second auxiliary protrusions 152a and 152b can be subjected to a texture. Thereby, the elastic partition film 115 can be caused to gently collide with the partition film displacement regulating member 117 or the lattice wall 118 to reduce noise.

  In the second embodiment, when the partition body 112 is assembled, the heights of the first and second displacement restricting protrusions 151a and 151b are such that the tops of the partition film displacement restricting member 117 and the lattice wall 118 come into contact with each other. However, the present invention is not necessarily limited to this, and the height of the protrusion may be set so that a gap is formed between the top portion thereof and the partition film displacement regulating member 117 or the lattice wall 118. Such a gap is preferably approximately 0.3 mm or less in the assembled state of the partition body 112.

  In the second embodiment, the elastic partition film 115 is used in the so-called single orifice type liquid-filled vibration isolator 200 in which the first liquid chamber 11A and the second liquid chamber 11B communicate with each other through one orifice 125. Although the case has been described, the present invention is not necessarily limited thereto, and it is naturally possible to apply the present invention to a so-called double orifice type liquid-filled vibration isolator.

  The double orifice type liquid-filled vibration isolator includes a main liquid chamber, two first and second sub liquid chambers, and the first and second sub liquid chambers and the main liquid chamber, respectively. It is configured to include two first and second orifices that communicate with each other.

It is a longitudinal cross-sectional view of the liquid filled type vibration isolator in 1st Example of this invention. It is a top view of a cylinder member. It is a vertical front view of a cylinder member. It is a side view of a cylinder member. It is a top view of a partition film displacement control member. It is a front view of a partition film displacement control member. It is a top view of an elastic partition film. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view of a partition body. It is COC sectional drawing of FIG. It is a longitudinal cross-sectional view of the liquid filled type vibration isolator in 2nd Example of this invention. (A) is a top view of a cylinder member, (b) is a side view of a cylinder member. It is DD sectional drawing of FIG. (A) is a top view of a partition film displacement control member, (b) is EE sectional drawing of Fig.15 (a). (A) is a top view of the elastic partition membrane, (b) is a side view of the elastic partition membrane, and (c) is a bottom view of the elastic partition membrane. It is FF sectional drawing of Fig.16 (a). It is a figure which shows the upper surface and lower surface of Comparative Examples 1-3. It is a figure which shows the upper surface and lower surface of this invention 1-3. It is a figure which shows the result of an abnormal noise evaluation test. (A) is a top view of the comparative example 1, (b) is a top view of this invention 2. FIG. (A)-(c) is the schematic diagram which expanded and showed the GG cross section of Fig.21 (a) on the plane, and represents the deformation | transformation state of an elastic partition film. (A) to (c) is a schematic diagram showing the HH cross section of FIG. 21 (b) developed in a plane, and shows a deformed state of the elastic partition membrane.

Explanation of symbols

100,200 Liquid-filled vibration isolator 1,101 First mounting bracket (first mounting bracket)
2,102 Second mounting bracket (second mounting bracket)
3,103 Anti-vibration base 8 Liquid enclosure 9 Diaphragm 11A First liquid chamber 11B Second liquid chamber 12, 112 Partitions 16, 116 Tube member (tube portion)
25, 125 Orifice 15, 115 Elastic partition membrane 17, 117 Partition membrane displacement regulating member (lattice member)
18, 118 lattice wall (lattice member)
50 rib group 51 first rib (rib)
52 2nd rib (auxiliary rib)
151a First displacement restricting protrusion 151b Second displacement restricting protrusion 152a First auxiliary protrusion (auxiliary protrusion)
152b Second auxiliary protrusion (auxiliary protrusion)
54,154 Lattice holes 54A to 54C, 154A to 154C Lattice holes P, T Axial core of elastic partition membrane

Claims (13)

A first fixture, a cylindrical second fixture, a vibration isolating base that connects the second fixture and the first fixture, and is made of a rubber-like elastic material; and the second fixture. A diaphragm which is attached and forms a liquid enclosure chamber with the vibration isolation substrate; and a partition which partitions the liquid enclosure chamber into a first liquid chamber on the vibration isolation substrate side and a second liquid chamber on the diaphragm side And an orifice for communicating the first liquid chamber and the second liquid chamber,
The partition body is a liquid-filled vibration isolator configured to include an elastic partition membrane and a pair of lattice members that regulate the amount of displacement of the elastic partition membrane from both sides,
Rib groups project from both surfaces of the elastic partition film, each rib group comprising a plurality of first ribs and a plurality of second ribs mixed together,
The height of the first rib is set so that the top of the first rib is located away from the lattice member,
The second rib has a height dimension so that a top portion thereof is in contact with the lattice member, and has a rib width smaller than that of the first rib. Shaker.   The first rib is disposed on the surface of the elastic partition film so as to surround the lattice holes for each predetermined number of lattice holes, and the second rib is distributed on the surface of the elastic partition film. The liquid-filled vibration isolator according to claim 1. The lattice holes are arranged in a plurality of rows in the circumferential direction of the lattice member,
The plurality of first ribs are formed in an annular shape, and are configured to be able to abut on the lattice member portions on both sides of each lattice hole row in the radial direction of the lattice member,
The liquid-filled vibration isolator according to claim 2, wherein the plurality of second ribs are arranged radially with respect to the axis of the elastic partition membrane.   2. The liquid-filled vibration isolating apparatus according to claim 1, wherein the first rib and the second rib are arranged on a surface of the elastic partition film so as to surround the lattice holes every predetermined number of lattice holes. apparatus. A first fixture, a cylindrical second fixture, a vibration isolating base that connects the second fixture and the first fixture, and is made of a rubber-like elastic material; and the second fixture. A diaphragm which is attached and forms a liquid enclosure chamber with the vibration isolation substrate; and a partition which partitions the liquid enclosure chamber into a first liquid chamber on the vibration isolation substrate side and a second liquid chamber on the diaphragm side And an orifice for communicating the first liquid chamber and the second liquid chamber,
The partition body is configured to include an elastic partition membrane, a cylindrical portion that accommodates the elastic partition membrane, and a pair of lattice members that regulate the displacement amount of the elastic partition membrane in the cylindrical portion from both sides. Type vibration isolator,
One lattice member of the pair of lattice members is integrally connected to the cylindrical portion between the inner peripheral surfaces of the cylindrical portions,
A plurality of ribs that can surround the lattice holes for each of a predetermined number of lattice holes are formed on both surfaces of the elastic partition membrane, respectively, and a plurality of auxiliary ribs are respectively arranged in a distributed manner.
The height of the rib is set so that the top of the rib is located away from the lattice member,
The liquid-filled vibration isolator, wherein the auxiliary rib has a height dimension set so that a top portion thereof abuts on the lattice member, and has a smaller rib width than the rib. The lattice holes are arranged in a plurality of rows in the circumferential direction of the lattice member,
The plurality of ribs are formed in an annular shape, and are configured to be able to abut on the lattice member portions on both sides of each lattice hole row in the radial direction of the lattice member,
6. The liquid filled type vibration damping device according to claim 5, wherein the auxiliary ribs are arranged radially with respect to the axis of the elastic partition membrane. A first fixture, a cylindrical second fixture, a vibration isolating base that connects the second fixture and the first fixture, and is made of a rubber-like elastic material; and the second fixture. A diaphragm which is attached and forms a liquid enclosure chamber with the vibration isolation substrate; and a partition which partitions the liquid enclosure chamber into a first liquid chamber on the vibration isolation substrate side and a second liquid chamber on the diaphragm side And an orifice for communicating the first liquid chamber and the second liquid chamber,
The partition body is a liquid-filled vibration isolator configured to include an elastic partition membrane and a pair of lattice members that regulate the amount of displacement of the elastic partition membrane from both sides,
A first displacement restricting protrusion protruding from one surface of the elastic partition film; and a second displacement restricting protrusion protruding from the lattice member facing the other surface side or the other surface side of the elastic partition film. ,
The first displacement regulating projection is disposed at a position asymmetric with the second displacement regulating projection with respect to a virtual plane passing through the center in the thickness direction of the elastic partition film. Shaker.   The liquid-filled vibration isolator according to claim 7, wherein the second displacement restricting protrusion is provided so as to protrude from the other surface side of the elastic partition film. At least a part of the second displacement restricting protrusion is radially arranged with respect to the axis of the elastic partition film,
At least a part of the first displacement restricting protrusion is radially disposed with respect to the axis of the elastic partition film at a substantially intermediate position between the pair of second displacement restricting protrusions that are radially arranged and adjacent to each other. The liquid-filled type vibration damping device according to claim 7 or 8, wherein: Each of the first displacement restricting protrusions and the second displacement restricting protrusions is arranged radially at substantially equal intervals in the circumferential direction with respect to the axis of the elastic partition film,
The first displacement restricting protrusion is disposed with a rotational angle of approximately π / n with respect to the second displacement restricting protrusion in the circumferential direction, and the first displacement restricting protrusion and the second displacement restricting protrusion are substantially the same. The liquid filled type vibration damping device according to claim 8, wherein the liquid filled type vibration damping device is configured to have a height and a width of the protrusion.   The top of each of the first displacement restricting protrusion and the second displacement restricting protrusion is configured to have a height capable of contacting the lattice member or the elastic partition film. A liquid-filled vibration isolator according to claim 1.   Auxiliary protrusions are provided to protrude from one side and the other side of the elastic partition film, respectively, and the auxiliary protrusions have a protrusion height lower than that of the first displacement restricting protrusion and a protrusion width is reduced. The liquid-filled type vibration damping device according to claim 7, wherein the liquid-filled type vibration damping device is configured as described above.   An elastic partition membrane used in the liquid-filled vibration isolator according to any one of claims 1 to 12.

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