JP2009108943A - Liquid-sealed vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid-sealed vibration control device capable of reducing the cost and weight of a material by thinning a component or changing its material to a low-strength material. <P>SOLUTION: In a liquid-sealed vibration control device, an upper side member is connected to an engine E side, a stopper member is connected to a vehicle body frame BF side, and a diaphragm member 9 is embedded in the vehicle body frame BF side, hereby the mounting total height (height from a mounting surface of the vehicle body frame BF to a mounting surface of the bracket BL) of an engine mount 100 can be reduced. Since the rigidity strength necessary to support the crosswise load can be reduced, the thickness of the component can be reduced and the material can be changed to the low-strength material by just that much. As a result, the engine mount 100 can be reduced in weight and material cost as a whole. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid-filled vibration isolator, and in particular, a liquid-filled vibration-proof device that can reduce the material cost and reduce the weight by making it possible to reduce the thickness of a component member or to change to a low-strength material. The present invention relates to a vibration device.

  2. Description of the Related Art A liquid-filled vibration isolator is known as a vibration isolator that prevents an engine vibration from being transmitted to a body frame while supporting and fixing an automobile engine.

  For example, in Japanese Patent Application Laid-Open No. 2007-211972, a first mounting bracket and a second mounting bracket are connected by a vibration-proof base made of a rubber-like elastic body, and a diaphragm attached to the second mounting bracket and a vibration-proofing are disclosed. A liquid sealing chamber is formed between the substrate and the liquid sealing chamber. The liquid sealing chamber is divided into a first liquid chamber and a second liquid chamber by a partition, and the first liquid chamber and the second liquid chamber communicate with each other by an orifice. An enclosed vibration isolator is disclosed.

The second mounting bracket of the liquid-filled vibration isolator comprises a cylindrical cylindrical bracket on which the vibration isolating base is vulcanized and a cup-shaped bottom bracket attached to the vehicle body frame side. A cylindrical metal fitting is stacked in series on the side (Patent Document 1).
JP 2007-211972

  However, in the above-described conventional liquid-filled vibration isolator, the cylindrical bracket and the bottom bracket are configured as members that support the weight of the engine, so the cylindrical bracket and the bottom bracket are made of a relatively thick and high-strength material. Therefore, there is a problem that the material cost and the product weight increase accordingly.

  Further, the above-described conventional liquid-filled vibration isolator has a configuration in which the cylindrical metal fittings are stacked in series on the bottom metal fitting attached to the vehicle body frame, so that the overall height of the liquid-filled vibration-proof device as a whole increases. As a result, a large load acts on the bottom metal fitting and the cylindrical metal fitting against the displacement in the lateral direction. From this point also, it is necessary to use a relatively thick and high-strength material for the cylindrical metal fitting and the bottom metal fitting. As a result, there is a problem that the material cost and the product weight increase accordingly.

  The present invention has been made to solve the above-described problems, and can reduce the material cost and reduce the weight by making it possible to reduce the thickness of the constituent members or to change to a low-strength material. It aims at providing a liquid enclosure type vibration isolator.

  In order to achieve this object, the liquid-filled vibration isolator according to claim 1 comprises an upper member, an intermediate member, the upper member and the intermediate member, and an anti-vibration base configured by a rubber-like elastic body. A diaphragm member that is attached to the intermediate member and forms a liquid sealing chamber between the vibration isolating substrate, a main liquid chamber on the vibration isolating substrate side, and a sub liquid chamber on the diaphragm member side And a stopper member that is attached to the intermediate member and exerts a stopper action between the upper member and the upper liquid member. The intermediate member includes a connecting portion to which the vibration-proof base is connected, and an intermediate projecting portion that protrudes radially outward from the connecting portion in a flange shape, and the stopper member is an intermediate member of the intermediate member. Above the overhang A stopper overhanging portion overlaid from the material side, a stopper restricting portion standing from the inner edge of the stopper overhanging portion to restrict the displacement of the upper member, and projecting radially outward from the outer edge of the stopper overhanging portion A pair of stopper fixing portions located between the stopper restricting portions, and the diaphragm member includes a bottom portion in which an opening is formed, a cylindrical tube portion erected from an outer edge of the bottom portion, and the cylindrical portion Projecting radially outward from the upper end in a flange-like manner, the intermediate projecting portion of the intermediate member is erected from a lower projecting portion that is overlapped from the opposite side of the stopper projecting portion and an outer edge of the lower projecting portion. A lower member having a pair of bent pieces located between the cylindrical portions; a flexible rubber portion that closes the opening of the bottom portion and is formed into a film shape from a rubber-like elastic body; and the flexible rubber The upper surface of the bottom and the inside of the tube An intermediate projecting portion of the intermediate member between the lower projecting portion of the lower member and the stopper projecting portion of the stopper member. The lower member and the stopper member are attached to the intermediate member, and the partition member is folded back by folding the bent piece of the lower member toward the stopper protruding portion side of the stopper member. The means is sandwiched between the vibration isolating base and the covering rubber portion covering the bottom of the lower member, the upper member is connected to the vibration generator side, and the stopper fixing portion of the stopper member is on the vehicle body frame side And at least the diaphragm member is embedded on the vehicle body frame side.

  The liquid-filled vibration isolator according to claim 2 is the liquid-filled vibration isolator according to claim 1, wherein the stopper member dents the inner surface side facing the vibration-proof base and bulges the outer surface side. The rib portion is formed continuously from the stopper restricting portion side to the stopper fixing portion side, and at least at the intermediate overhang portion of the intermediate member from the stopper restricting portion side. A space formed between the anti-vibration base and the stopper restricting portion is formed to a position exceeding the outer edge, and communicates with the outside through a space formed by a recess on the inner surface side of the rib portion.

  The liquid-filled vibration isolator according to claim 3 is the liquid-filled vibration isolator according to claim 1 or 2, wherein the bent piece is connected to the central bent piece and both sides of the central bent piece. A pair of end bent pieces provided, and the end bent pieces are configured in a circular arc shape in a front view having a radius larger than at least the plate thickness in the standing direction and convex at the leading end in the standing direction. As the distance from the central bent piece increases, the standing height from the lower projecting portion decreases.

  According to the liquid-filled vibration isolator of claim 1, the upper member and the intermediate member are connected by the vibration isolating base, and the diaphragm member is attached to the intermediate member, so that the space between the vibration isolating base and the diaphragm member is obtained. A liquid sealing chamber is formed in the upper member, and the liquid sealing chamber is partitioned into a main liquid chamber and a sub liquid chamber by a partitioning unit, and the main liquid chamber and the sub liquid chamber are communicated by an orifice. And the intermediate member are moved relative to each other in the direction of approaching or separating from each other, the vibration damping function and the vibration insulating function are exhibited by the fluid flow effect between the liquid sealing chambers by the orifice and the vibration damping effect of the vibration isolating substrate. .

  Here, according to the present invention, the intermediate member includes the connecting portion to which the anti-vibration base is connected, and the intermediate projecting portion protruding in a flange shape radially outward from the connecting portion. A stopper overhanging part that is superimposed on the protruding part from the upper member side, a stopper restricting part that is erected from the inner edge of the stopper overhanging part and restricts the displacement of the upper member, and protrudes radially outward from the outer edge of the stopper overhanging part And a stopper member attached to the intermediate member. The upper member is connected to the vibration generator, and the stopper fixing portion of the stopper member is connected to the vehicle body frame. The mounting height of the fluid-filled vibration isolator (from the mounting surface on the vehicle body frame side to the mounting surface on the engine side) There is an effect that it is possible to lower the Is).

  As a result, the rigidity of the engine support structure as a whole can be ensured and the stability can be improved compared to the conventional product, which has a higher mounting height (total height) of the liquid-filled vibration isolator. There is.

  In addition, the rigidity required to support the load in the lateral direction can be reduced compared to the conventional product, so that the component members (intermediate member, lower member, and stopper member) are thin. And the material change to a low strength material can be performed. As a result, there is an effect that it is possible to reduce the weight and material cost of the liquid-filled vibration isolator as a whole.

  Further, according to the present invention, the rigidity strength for supporting the weight of the engine can be mainly given to the upper member and the stopper member, and accordingly, the rigidity strength required for the intermediate member and the lower member is reduced. Therefore, also from this point, the thickness of the intermediate member and the lower member can be reduced and the material can be changed to a low-strength material. It is possible to reduce the weight and reduce the material cost.

  Since the stopper member is a member for exerting a stopper action with respect to the upper member, it is a member having a thick plate thickness as in the conventional product. That is, the stopper member is a member used in a portion where rigidity and strength are required, and originally the plate pressure is configured to be thick, so that the stopper member is connected to the vehicle body frame side as in the present invention. Even if it is set as the structure which carries out, it is not necessary to make the board | plate thickness of a stopper member thicker than the conventional product resulting from this. As a result, there is an effect that it is possible to efficiently reduce the weight of the liquid-filled vibration isolator as a whole and reduce the material cost.

  According to the present invention, the lower member includes the bent piece, and the intermediate projecting portion of the intermediate member is sandwiched between the lower projecting portion of the lower member and the stopper projecting portion of the stopper member. Since the lower member and the stopper member are attached to the intermediate member by folding the bent piece of the lower member back to the stopper overhanging portion side of the stopper member, the work efficiency at the time of manufacture is improved. There is an effect that it can be planned.

  That is, as described above, according to the liquid-filled type vibration isolator of the present invention, the thickness of the stopper member is thick, and compared with the thickness of the stopper member, the thickness of the lower member is Since it can be configured to be thin, by forming a bent piece on the lower member and bending the bent piece, the bending work is facilitated, and the work efficiency during manufacturing is improved accordingly. be able to.

  Here, according to the liquid-filled type vibration isolator of the present invention, the diaphragm member includes a bottom portion in which the opening is formed, a cylindrical tube portion erected from the outer edge of the bottom portion, and an upper end of the tube portion. The lower member has a lower projecting portion that projects in a radially outward manner in a flange shape, and has a lower projecting portion that overlaps the intermediate projecting portion of the intermediate member from the opposite side of the stopper projecting portion, and closes the bottom opening and rubber. The liquid rubber chamber is formed between the elastic rubber body and the anti-vibration base, and the fluid flow effect can be exerted by the deformation of the flexible rubber section. it can.

  In this case, the lower member includes an overlaid rubber portion that is connected to the flexible rubber portion and covers the upper surface of the bottom portion and the inner peripheral surface of the cylindrical portion, and is formed of a rubber-like elastic body, and includes a lower member (diaphragm member) and When the stopper member is attached to the intermediate member, the partition means is sandwiched between the vibration isolation base and the covering rubber portion that covers the bottom of the lower member, so that the diaphragm can exert a fluid flow effect. There is an effect that this function and the function for holding and fixing the partition means can be shared by the diaphragm member.

  That is, in the conventional liquid-filled vibration isolator, it is necessary to provide a fixing member for holding and fixing the partition means separately from the diaphragm member. However, in the present invention, the diaphragm member is configured to have both functions. Therefore, there is an effect that the fixing member can be omitted and the weight can be reduced and the component cost can be reduced accordingly.

  Further, according to the liquid-filled vibration isolator of the present invention, the vibration isolating base and the covering rubber part are made of a rubber-like elastic body, and the partition means is sandwiched between the vibration isolating base and the covering rubber part. Therefore, the elastic restoring force of the rubber-like elastic body can be used to firmly hold and fix the partition means, thereby suppressing the occurrence of chatter (vibration) when a large displacement is input or in a high frequency region. effective.

  According to the liquid-filled vibration isolator according to claim 2, in addition to the effect exerted by the liquid-filled vibration isolator according to claim 1, the stopper member dents the inner surface side facing the vibration-proof base and the outer surface side. Since the rib portion formed by bulging is provided, there is an effect that the rigidity strength of the stopper member can be increased by the rib portion. As a result, the stopper member can firmly receive the displacement of the upper member and reliably exert the stopper action. Moreover, since the thickness of the stopper member can be reduced and the material can be changed to a low-strength material, the weight of the liquid-filled vibration isolator as a whole can be reduced and the material cost can be reduced accordingly. .

  In addition, according to the liquid-filled type vibration isolator of the present invention, the rib portion is formed continuously from the stopper regulating portion side to the stopper fixing portion side. Thus, there is an effect that it can be improved synergistically.

  That is, according to the liquid-filled type vibration isolator of the present invention, the stopper fixing portion is fixed to the vehicle body frame side. Therefore, as the stopper member exerts a stopper action with the upper member, the stopper When the restricting portion is displaced in a direction approaching or separating from the stopper fixing portion, the displacement of the stopper restricting portion can be supported not only on the stopper fixing portion but also on the vehicle body frame via the rib portion.

  As a result, not only the rigidity of the stopper fixing part but also the rigidity of the body frame can be used to support the stopper restricting part, so that the thickness of the stopper member can be reduced and the material used for the low-strength wood material. Even if the change is made, the stopper member can firmly receive the displacement of the upper member and reliably exert the stopper action.

  Here, according to the liquid-filled vibration isolator of the present invention, since the rib portion is formed from the stopper regulating portion side to a position exceeding at least the outer edge of the intermediate overhang portion of the intermediate member, The space formed between the stopper restricting portion and the stopper can be communicated with the outside through the space formed by the depression on the inner surface side of the rib portion.

  Accordingly, there is an effect that the water accumulated in the space between the vibration isolating base and the stopper restricting portion can be discharged to the outside using such communication. As a result, it is possible to suppress the deterioration of the vibration-proof substrate, the stopper member, and the like due to the influence of accumulated water and the like.

  Further, according to the liquid-filled vibration isolator of the present invention, there is no need to make a drain hole in the stopper member for discharging water or the like to the outside. There is an effect that the cost can be reduced.

  Further, since the stopper member is a member that exerts a stopper action with respect to the upper member, if a water drain hole is drilled, the durability is reduced due to the occurrence of a crack starting from the water drain hole. However, according to the liquid-filled vibration isolator of the present invention, it is possible to eliminate the need for a water drain hole, so that the rigidity of the stopper member is ensured and the durability is improved accordingly. There is an effect that can be.

  According to the liquid-filled vibration isolator according to claim 3, in addition to the effect exerted by the liquid-filled vibration isolator according to claim 1 or 2, when folding the bent piece to the stopper overhanging portion side of the stopper member In addition, by suppressing the inner side R at the root portion of the end bent piece from being crushed, cracks from the root portion of the end bent piece (particularly, the portion at which the inner side R is crushed at the extreme end side) are reduced. There is an effect that the generation can be suppressed and the durability can be improved.

  That is, according to the liquid-filled type vibration isolator of the present invention, the end bent pieces connected to both sides of the central bent piece are erected from the lower projecting portion as they are separated from the central bent piece. Since the height is configured to be low, when the bending force of the caulking jig is applied to the tip of the bent piece in the standing direction, As the operation progresses, the contact area between the front end of the end bent portion and the caulking jig is changed from the inner side (side connected to the central bent piece) to the outer side (side away from the central bent piece). The wrapping operation can be performed while gradually increasing toward the.

  As a result, the entire folded end piece cannot be folded back uniformly, but the folded area can be gradually folded outwardly (side away from the central folded piece), so that the folded end piece The load on the root portion (especially, the root portion on the endmost side) can be suppressed, and thereby the end bent piece can be folded back without collapsing the inner side R at the root portion of the end bent piece. it can. As a result, it is possible to suppress the occurrence of cracks from the root portion of the end bent piece (particularly, the root portion on the endmost side), thereby improving durability.

  Here, the end bent piece is configured to have a front-view arc shape at the front end in the standing direction, and the arc shape is configured to have a front-view arc shape convex to the front end in the projecting direction. Since the tip of the direction can be smoothly slid on the caulking surface of the jig and the contact area can be increased smoothly, when the end bent piece is folded back, the base portion of the end bent piece There is an effect that the inner side R can be more reliably prevented from being crushed.

  In addition, since the arc shape at the tip of the standing direction is configured to be a front-view arc shape that is convex at the tip of the projecting direction, as the folding operation proceeds, the tip end direction of the above-described end bent portion is caulked and cured. The increasing speed of the contact area with the tool can be gradually reduced. That is, at the beginning of the folding operation, it is a deformation mode that mainly folds the front end side in the standing direction of the end bent portion, and since the influence on the root portion of the end bent portion is small, the increase speed of the contact area described above On the other hand, the second half of the folding operation is a deformation mode that greatly affects the deformation of the root portion of the end bent portion (particularly, the root portion on the endmost side). To slow down.

  As a result, the end bent portion can be securely folded back toward the stopper overhanging portion, and the stopper member and the intermediate member can be firmly held and held while the load on the base portion of the end bent portion is reduced. There is an effect that it is possible to suppress the collapse of the inner side R at the root portion of the end bent piece (particularly, the root portion on the endmost side).

  In addition, the arc shape at the tip of the standing direction is configured in a front view arc shape that is convex at the tip of the projecting direction, so that the end bent portion is folded back toward the stopper overhanging portion, and the stopper member and the intermediate member are There is an effect that the stopper area and the intermediate member can be firmly held by increasing the clamping area (contact area) when the clamping is held.

  In addition, since the front end of the standing direction is formed in an arc shape when viewed from the front, the contact angle between the front end of the end bending portion and the caulking surface of the caulking jig is gradually increased as the folding operation proceeds. Therefore, the folding force can be greatly applied in the latter half of the folding operation while suppressing the folding force at the beginning of the folding operation. As a result, the end bent portion is reliably folded back to the stopper overhanging portion while suppressing the collapse of the inner side R at the root portion of the end bent piece, and the stopper member and the intermediate member are firmly held with pressure. There is an effect that can be done.

  Furthermore, since the radius of the arcuate shape at the front end in the standing direction tip is at least larger than the plate thickness, the end bent piece is produced by configuring the tip in the standing direction arc shape at the front view. There is an effect that the effect obtained can be further exhibited.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of an engine E supported by a liquid-filled vibration isolator 100 according to the first embodiment of the present invention. First, with reference to FIG. 1, the attachment state of the liquid filled type vibration isolator 100 will be described.

  The liquid-filled vibration isolator 100 is a vibration isolator for supporting and fixing the engine E to the vehicle body frame BF and reducing vibration transmitted from the engine E to the vehicle body frame. The detailed configuration of the liquid-filled vibration isolator 100 will be described later with reference to FIGS.

  The vehicle body frame BF supports the liquid-filled vibration isolator 100 and includes a hole into which a part of the liquid-filled vibration isolator 100 is inserted. The liquid-filled vibration isolator 100 inserted into the hole is fastened to the vehicle body frame BF. The vehicle body frame BF is a member press-formed from a flat plate of iron material, and is a recess formed in a U-shaped cross section along the shape of the lower part of the engine E (lower part in FIG. 1) on the lower side of the engine E. It has. Therefore, the mounting position of the engine E can be lowered using the space formed by the recesses.

  The engine E is disposed between the pair of liquid-filled vibration isolator 100, and both sides of the engine E (left-right side in FIG. 1) in the direction connecting the pair of liquid-filled vibration-proof devices 100 (left-right direction in FIG. 1). A pair of brackets BL are respectively disposed on the top.

  The bracket BL is made of an aluminum alloy and has a tapered shape. The front end portion is formed in a U shape and is fastened to a liquid-filled vibration isolator 100 disposed on both sides of the engine E (both sides in the left-right direction in FIG. 1).

  Next, a detailed configuration of the liquid-filled vibration isolator 100 will be described with reference to FIGS. 2 is a top view of the liquid-filled vibration isolator 100, FIG. 3 is a side view of the liquid-filled vibration isolator 100 as viewed in the direction of arrow III in FIG. 2, and FIG. 4 is the direction of arrow IV in FIG. 1 is a side view of a liquid-filled vibration isolator 100 as viewed. 5 is a cross-sectional view of the liquid-filled vibration isolator 100 taken along line VV in FIG. 2, and FIG. 6 is a cross-sectional view of the liquid-filled vibration isolator 100 taken along line VI-VI in FIG. is there.

  As shown in FIGS. 5 and 6, the liquid-filled vibration isolator 100 includes an upper member 1 attached to the engine side, a cylindrical intermediate member 6, and a rubber-like elastic body that connects them. And a diaphragm member 2 which is attached to the intermediate member 6 and forms a liquid sealing chamber 12 therebetween.

  The upper member 1 is formed in a substantially column shape from an aluminum alloy or the like, and as shown in FIGS. 2 and 6, a mounting bolt 4 is projected on the upper surface (upper side surface in FIGS. 4 and 6). Further, a positioning projection 1b is provided on the side of the mounting bolt 4 (upward in FIGS. 4 and 6).

  As shown in FIGS. 5 and 6, the intermediate member 6 is formed in a cylindrical shape having an opening extending upward from the aluminum alloy, and the intermediate member fixing portion 32 (see FIG. 10) projects outward from the upper end opening in the radial direction. ing. The intermediate member fixing portion 32 of the intermediate member 6 is attached between a lower member 7 and a stopper member 8 described later.

  As shown in FIGS. 5 and 6, the vibration isolation base 3 is formed from a rubber-like elastic body in a substantially truncated cone shape, and radially outward from the lower surface side (lower side of FIGS. 5 and 6) of the upper member 1. Vulcanization bonding is performed between the overhanging portion 1 c and the inner opening of the intermediate member 6. In addition, a covering portion 3 a that covers the overhanging portion 1 c of the upper member 1 is formed at the upper end portion (upper side of FIGS. 5 and 6) of the vibration isolation base 3. The cover portion 3a is in contact with the stopper member 8 so that a stopper action at the time of large displacement can be obtained.

  As shown in FIGS. 3 to 6, the stopper member 8 is formed in a cylindrical shape having an opening that extends downward from the aluminum alloy. A stopper fixing portion 21 (see FIG. 8) projecting in the radial direction is formed, and the mounting bolt 5 is projected from the stopper fixing portion 21. The stopper member 8 is fastened to the upper surface (the upper surface in FIGS. 5 and 6) of the vehicle body frame BF via the mounting bolt 5. The stopper member 8 is caulked and fixed together with the intermediate member 6 by a diaphragm member 2 disposed on the lower side of the stopper member 8 (the lower side in FIGS. 5 and 6). The diaphragm member 2 is a body frame BF. Embedded in the hole.

  That is, since the diaphragm member 2 attached to the lower side of the stopper member 8 (lower side in FIGS. 5 and 6) is embedded on the vehicle body frame BF side, the total mounting height of the liquid filled type vibration damping device 100 (FIG. 1). The height from the attachment surface on the vehicle body frame BF side to the attachment surface on the engine E side shown in FIG.

  As a result, the rigidity of the engine support structure as a whole can be ensured and the safety can be improved as compared with the conventional product in which the mounting height (total height) of the liquid-filled vibration isolator is high.

  Further, compared to the conventional product, the rigidity and strength required to support the load in the left and right direction of the vehicle body frame BF (in the direction of the arrow LR) can be reduced, so that the constituent members (stopper member 8, intermediate member) 6 and lower member 7) are reduced in thickness and thickness of T1 (refer to FIG. 9), T2 (refer to FIG. 10), and T3 (refer to FIG. 12 (b)) and the material is changed to a low strength member. As a result, the liquid-filled vibration isolator 100 as a whole can be reduced in weight and material cost.

  Further, the rigidity strength for supporting the weight of the engine E can be mainly assigned to the upper member 1 and the stopper member 8, and accordingly, the plate thickness dimension T2 (see FIG. 10) and the lower side of the intermediate member 6 are reduced. The plate thickness dimension T3 (see FIG. 12) of the member 7 is reduced to reduce the thickness of the intermediate member 6 and the lower member 7, and to change the material of the intermediate member 6 and the lower member 7 to a low-strength material. As a result, the liquid-filled vibration isolator 100 as a whole can be reduced in weight and material cost.

  The stopper member 8 is a member having a plate thickness as in the conventional product because the upper member 1 is in contact with the stopper member 8 and restricts displacement of the engine E relative to the vehicle body frame BF. That is, the stopper member 8 is a member used in a portion where rigidity strength is required and originally has a thick plate thickness. Therefore, as in the first embodiment, the stopper member 8 is used. Even when it is configured to be connected to the body frame BF, it is not necessary to make the plate thickness of the stopper member 8 thicker than that of the conventional product. As a result, it is possible to efficiently reduce the weight of the liquid-filled vibration isolator 100 as a whole and reduce material costs.

  The diaphragm member 2 is a member for forming the liquid sealing chamber 12 between the diaphragm member 2 and the diaphragm member 2 and is configured in a cup shape having an axis O as shown in FIGS. 7, a flexible rubber portion 9, and a covering rubber portion 10.

  As shown in FIGS. 3 to 6, the lower member 7 is configured in a cylindrical shape having an opening extending upward from the aluminum alloy. As shown in FIGS. 5 and 6, a covering rubber portion 10 vulcanized and molded from a rubber-like elastic body is attached to the entire circumference of the inner peripheral surface of the lower member 7, and the covering rubber portion A flexible rubber portion 9 is coupled to the entire periphery of the lower end portion (the lower end portion of FIGS. 5 and 6) of FIG.

  The flexible rubber portion 9 is vulcanized and molded from a rubber-like elastic body into a bellows shape, and has an opening (lower opening of the lower member lower cylinder portion 40) on the lower side (lower side of FIGS. 5 and 6) of the lower member 7. Part). Further, since the vibration-proof base 3 is brought into contact with the entire circumference of the upper part of the covering rubber part 10 (upper part of FIGS. 5 and 6), the upper surface side of the flexible rubber part 9 (upper side of FIGS. 5 and 6). ) And the lower surface side (the lower surface side of FIGS. 5 and 6) of the vibration isolating substrate 3 is formed with a liquid enclosure chamber 12. The liquid enclosing chamber 12 is filled with an antifreeze liquid (not shown) such as ethylene glycol.

  As shown in FIGS. 5 and 6, the liquid sealing chamber 12 is divided into a main liquid chamber 12 </ b> A on the side of the vibration isolation base 3 (upper side of FIGS. 5 and 6) and a flexible rubber portion 9 side (FIG. 5) by a partition 14. And the lower liquid chamber 12B (lower side in FIG. 6).

  The partition body 14 changes the dynamic spring characteristic or damping characteristic of the liquid-filled vibration isolator 100 by controlling the flow of the liquid in the liquid-filled chamber 12, and as shown in FIGS. Elastic partition membrane 15 configured in the shape of a substantially disc-shaped rubber film from a cylindrical elastic body, an orifice fitting 16 that accommodates the elastic partition membrane 15, and one axial end side of the orifice fitting 16 (FIGS. 5 and 6) And a disc-shaped partition plate member 17 that covers the upper side opening.

  The partition plate member 17 and the orifice fitting 16 are configured in a disc shape having an axis O and a radius R0, and include a lattice-like wall portion. The elastic partition film 15 is accommodated between the opposing surfaces of the wall portion of the partition plate member 17 and the wall portion of the orifice fitting 16, and its displacement is restricted from both sides. An orifice passage 13 is formed between the outer peripheral surface of the orifice fitting 16 and the covering rubber portion 10 that covers the inner peripheral surface of the lower member 7.

  The orifice passage 13 is an orifice flow path that connects the main liquid chamber 12A and the sub liquid chamber 12B, and the main liquid chamber 12A and the sub liquid chamber 12B have openings. The inside of the orifice passage 13 is filled with a liquid that flows due to the relative displacement between the upper member 1 and the diaphragm member 2, and a fluid flow effect can be exhibited by the deformation of the flexible rubber portion 9.

  Here, in the first embodiment, the diaphragm member 2 includes the lower member 7 that holds the partition body 14, the orifice fitting 16, and the covering rubber portion 10 that forms the orifice passage 13. The diaphragm member 2 can be combined with a function as a diaphragm for exerting the effect and a function for holding and fixing the partition body 14.

  That is, in the conventional liquid-filled vibration isolator, it is necessary to provide a fixing member for holding and fixing the partition 14 separately from the diaphragm member 2, but in the first embodiment, the diaphragm member 2 has both functions. Therefore, the fixing member can be omitted, and the weight can be reduced and the part cost can be reduced accordingly.

  Here, as shown in FIGS. 5 and 6, the vibration isolator base 3 includes a partition body receiving step 3c formed as a step over the entire circumference on the lower surface side (lower side of FIGS. 5 and 6). The partition receiving step 3c locks the upper end surface of the partition 14 (upper end surface in FIGS. 5 and 6). Further, the lower end surface (the lower end surface in FIGS. 5 and 6) of the partition body 14 is in contact with the upper surface of the lower member 7 through the covering rubber portion 10.

  Further, the gap dimension value between the upper surface of the lower member 7 and the partition receiving step 3c of the vibration isolator base 3 is set to be smaller than the height dimension value (the vertical dimension values in FIGS. 5 and 6). Has been. Therefore, in the assembled state of the liquid-filled vibration isolator 100 in which the intermediate member 6 vulcanized and bonded to the vibration isolator base 3 is fixed by the lower member 7, the partition body receiving step 3 c is the partition body 14. The elastic restoring force of the partition receiving step 3c acts on the partition 14 as a holding force. As a result, it is possible to securely fix the partition body 14 and to suppress the occurrence of chatter (vibration) when a large displacement is input or in a high frequency region.

  7A is a top view of the upper member 1, FIG. 7B is a cross-sectional view of the upper member 1 taken along line VIIb-VIIb in FIG. 7A, and FIG. It is sectional drawing of the upper member 1 in the VIIc-VIIc line | wire of Fig.7 (a). In addition, in order to make an understanding easy, the attachment bolt 4 has shown the side surface instead of the cross section.

  The upper member 1 is a member fastened to the engine E side. As shown in FIGS. 7 (a), 7 (b), and 7 (c), the upper member 1 is an approximately elliptical cross section made of an aluminum alloy or the like. It is formed in a cylindrical shape. Further, as shown in FIG. 7A, the upper member upper surface 1f, which is an upper flat surface of the upper member 1, is formed in a substantially elliptical shape, and the dimension value of the major axis of the substantially elliptical shape is the major axis dimension. It is configured as W1.

  The major axis direction of the substantially elliptical shape (FIG. 7 (a) left-right direction) is arranged along the arrow FB direction (left-right direction in FIG. 13) which is the front-rear direction of the body frame BF (see FIG. 13). A mounting bolt 4 that is fastened to the bracket BL (see FIG. 1) protrudes from the center in the major axis direction of the upper surface 1f of the upper member that is the upper surface (upper side surface in FIG. 7A) of the upper member 1.

  Further, as shown in FIGS. 7A and 7C, a protruding portion 1 d that protrudes in the short-diameter direction (upward in FIG. 7A) is provided on the side surface of the upper member 1. It is extended in the direction (FIG. 7 (c) vertical direction). The upper surface of the protrusion 1d (the upper surface in FIG. 7C) is disposed at a position flush with the upper surface 1f of the upper member, and the positioning protrusion 1b is provided on the upper surface of the protrusion 1d. Projected along the longitudinal direction.

  The positioning convex portion 1b is a protruding portion that positions the upper member 1 with respect to the vehicle body frame BF in the rotational direction around the mounting bolt 4, and is fitted in a hole formed in the vehicle body frame BF. Note that the depth dimension value of the hole formed in the body frame BF is set to a dimension value larger than the projecting height dimension value of the positioning protrusion 1b, and the hole formed in the body frame BF The entire part 1b is accommodated. Therefore, the positioning convex portion 1b does not contact the bottom of the hole formed in the vehicle body frame BF.

  Therefore, when the upper member upper surface 1f is attached to the vehicle body frame BF, the upper member upper surface 1f is prevented from being inclined with respect to the attachment surface of the vehicle body frame BF, and the upper member upper surface 1f is brought into surface contact with the vehicle body frame BF. it can.

  As a result, the force generated by the relative displacement between the engine E and the vehicle body frame BF (hereinafter abbreviated as “displacement force”) can be received by the entire upper surface 1f of the upper member, and locally on the upper surface 1f of the upper member. It is possible to prevent the buckling of the upper surface 1f of the upper member by suppressing an increase in pressure.

  For example, when the positioning convex portion 1b is projected from the upper surface 1f of the upper member, a hole for accommodating the positioning convex portion 1b is recessed in the vehicle body frame BF, so that the area of the hole receives the displacement force. I can't. For this reason, the area for receiving the displacement force decreases by the area of the hole, and the pressure on the upper surface 1f of the upper member increases accordingly.

  Here, in the first embodiment, the positioning convex portion 1b is arranged not in the major axis direction of the upper member upper surface 1f where a large displacement force is input but in the minor axis direction where a small displacement force is input compared to the major axis direction. Since it is provided, positioning can be performed without reducing the area of the upper surface 1f of the upper member in the major axis direction. Therefore, it is possible to prevent buckling by suppressing an increase in pressure on the upper surface 1f of the upper member in the major axis direction and to perform positioning with respect to the vehicle body frame BF.

  Further, as shown in FIGS. 7B and 7C, an overhanging portion 1c is coupled to the lower surface side of the upper member 1 (the lower surface side of FIGS. 7B and 7C). As shown in FIG. 7A, the projecting portion 1c is formed in a flange shape in the outer diameter direction and has a circular shape with a top view diameter D1.

  An outer edge lower surface 1e, which is a ring-shaped bottom surface, is formed on the lower surface (the lower surface side in FIG. 7B) of the protruding portion 1c, and the outer edge lower surface 1e is formed radially outward. It is formed so that it goes to the upper side (FIG. 7 (b) and FIG. 7 (c) upper side) as it goes.

  The overhanging portion 1c is embedded in the vibration isolating base 3 (see FIGS. 5 and 6), and the upper member 1 and the vibration isolating base 3 are integrally formed (see FIGS. 5 and 6). ). Therefore, the impact force generated when the overhanging portion 1c abuts against the stopper member 8 can be reduced.

  8 is a top view of the stopper member 8, and FIG. 9 is a cross-sectional view of the stopper member 8 taken along line IX-IX in FIG.

  The stopper member 8 is a member for protecting the anti-vibration base 3 from dust scattered from the road surface while restricting the displacement of the upper member 1 with respect to the vehicle body frame BF. As shown in FIGS. 8 and 9, the stopper member 8 is press-molded from a flat plate of an aluminum alloy having a plate thickness dimension T1, and is configured in a cylindrical shape having an axis O and an upwardly opening.

  The stopper member 8 includes a stopper overhanging portion 20 that is superimposed on the intermediate member 6 (see FIG. 6) from above, a stopper restricting portion 22 that restricts the displacement of the upper member 1, and a pair of fasteners fastened to the vehicle body frame BF. And a stopper fixing portion 21.

  The stopper overhanging portion 20 is a portion that is caulked and fixed by the lower member 7 and improves the strength of the inclined cylindrical portion 22c described later. As shown in FIGS. 8 and 9, the outer diameter of the radius R1 is increased. It has a flat plate shape that has an annular shape when viewed from above.

  The opening lower end (lower end in FIG. 9) of the stopper restricting portion 22 is coupled over the entire inner circumference of the stopper overhanging portion 20, and a pair of the outer ends of the stopper overhanging portion 20 are opposed to each other by 180 °. The stopper fixing portions 21 project outward in the radial direction (outward in the left-right direction in FIG. 8).

  Further, since the stopper fixing portion 21 extends in the range of 80 ° in the radial direction of the stopper overhanging portion 20, the gap between one and the other of the pair of stopper fixing portions 21 extends over 100 °. Thus, an outer diameter portion of the stopper overhang portion 20 is formed.

  For this reason, the pair of outer diameter portions of the stopper overhang portion 20 are formed at positions facing each other by 180 °. Therefore, when the stopper overhanging portion 20 is caulked with the lower member 7 to be described later, the position facing 180 ° can be caulked. As a result, the stopper member 8 can be caulked and fixed in a balanced manner without biasing the caulking force.

  The stopper fixing portion 21 is a part for fixing the stopper member 8 to the vehicle body frame BF. As shown in FIG. 8, the stopper fixing portion 21 has a substantially trapezoidal flat plate shape when viewed from above, and a portion corresponding to the long side of the trapezoid is connected to the stopper overhanging portion 20. Further, as described above, the bolts 5 that are fastened to the vehicle body frame BF are fixed through through from the upper surface to the lower surface of the stopper fixing portion 21.

  Accordingly, the rigidity and strength of the stopper fixing portion 21 can be improved by integrating the body frame BF and the stopper fixing portion 21. Further, since the pair of stopper fixing portions 21 are respectively fastened to the vehicle body frame BF, the displacement of the stopper fixing portions 21 is regulated by using the rigidity strength of the vehicle body frame BF, and the rigidity strength of the stopper member 8 is thus determined. Can be improved.

  The stopper restricting portion 22 is a portion that restricts displacement of the upper member 1 in the vertical direction (the vertical direction in FIG. 8), the horizontal direction (the vertical direction in FIG. 8), and the front-back direction (the horizontal direction in FIG. 8) with respect to the body frame BF. As shown in FIGS. 8 and 9, a restricting portion 22a, a wall portion 22b, and an inclined cylindrical portion 22c are provided.

  The restricting portion 22a protrudes through the anti-vibration base 3 when the protruding portion 1c (see FIGS. 5 and 6) of the upper member 1 is largely displaced upward (the upward direction in FIGS. 5 and 6 and the bound direction). When the upper member 1 (see FIGS. 5 and 6) is greatly displaced downward (the downward direction in FIGS. 5 and 6 and the rebound direction), the cover member 18 (see FIGS. 5 and 6) is in contact with the portion 1c. This is a portion that comes into contact with the vehicle body frame BF via (see FIG. 6).

  As shown in FIGS. 8 and 9, the restricting portion 22 a has an axial center O and is configured in an annular flat plate shape with a top view (viewed in the vertical direction in FIG. 8) inner diameter D <b> 2. Is disposed in parallel with the lower surface of FIG.

  The inner diameter D2 of the restricting portion 22a of the stopper member 8 is configured to be larger than the above-described major dimension W1 of the upper member 1 (D2> W1) and smaller than the diameter D1 of the overhanging portion 1c (D2 <D1). 1 is inserted from below into the hole of the stopper member 8 with the overhanging portion 1c side down.

  Therefore, when the upper member 1 is displaced upward with respect to the stopper member 8, the protruding portion 1c is brought into contact with the restricting portion 22a via the partition receiving step 3c, so that the stopper member 8 of the upper member 1 is contacted. The displacement with respect to can be regulated.

  The wall portion 22b passes through the vibration isolating base 3 when the projecting portion 1c (see FIGS. 5 and 6) of the upper member 1 is displaced in the left-right direction (vertical direction in FIG. 8) and the front-back direction (left-right direction in FIG. 8). It is a site | part which contacts the overhang | projection site | part 1c.

  As shown in FIGS. 8 and 9, the wall portion 22b is formed in a cylindrical shape having an axis O, and stands vertically from the entire outer periphery of the restricting portion 22a to the lower surface of the restricting portion 22a (the lower surface in FIG. 9). It is installed. Therefore, when the protruding portion 1c of the upper member 1 contacts the restricting portion 22a, the wall portion 22b becomes a portion that improves the strength of the restricting portion 22a, and the protruding portion 1c of the upper member 1 contacts the wall portion 22b. In this case, the restricting portion 22a becomes a portion that improves the strength of the wall portion 22b.

  Therefore, the protruding portion 1c (see FIGS. 5 and 6) of the upper member 1 (see FIGS. 5 and 6) contacts the restricting portion 22a, and the restricting portion 22a is deformed upward (upward in FIG. 9). Thus, the displacement of the upper member 1 (see FIGS. 5 and 6) can be restricted.

  Further, the protruding portion 1c (see FIGS. 5 and 6) of the upper member 1 (see FIGS. 5 and 6) abuts against the wall portion 22b, whereby the wall portion 22b is deformed in the left-right direction (left-right direction in FIG. 8). Thus, the displacement of the upper member 1 (see FIGS. 5 and 6) can be restricted.

  An inclined cylindrical portion 22c is coupled to the entire periphery of the opening on the lower side (lower side in FIG. 9) of the wall portion 22b, and the inclined cylindrical portion 22c includes the stopper overhanging portion 20 and the stopper fixing portion 21. Is a part for connecting to the stopper restricting portion 22.

  As shown in FIGS. 8 and 9, the inclined cylindrical portion 22c is formed in a cylindrical shape having an axis O and an opening that extends downward (lower in FIG. 9), and a pair of rib portions 22d that bulge from the outer surface thereof. It has. One of the pair of rib portions 22d is formed at a position that is point-symmetric about the axis O with respect to the other.

  Therefore, the rigidity strength of the inclined cylindrical portion 22c can be increased. As a result, the rigidity strength of the stopper member 8 is increased, and the displacement of the upper member 1 can be firmly received by the stopper member 8 and the displacement of the upper member 1 can be reliably regulated.

  Moreover, since the rigidity of the stopper member 8 can be increased and the stopper member 8 can be thinned and the material can be changed to a low-strength material, the liquid-filled vibration isolator 100 as a whole can be reduced in weight. In addition, material costs can be reduced.

  The rib portion 22d is a portion for improving the strength of the stopper fixing portion 21 and the inclined cylindrical portion 22c, and as shown in FIG. 8, bulges from the outer peripheral surface of the inclined cylindrical portion 22c into a substantially triangular shape when viewed from above. . Since one apex (the tip arc portion 22d1) of the triangle and the side (the bottom arc portion 22d2) arranged to face the apex are arranged on the virtual straight line L, the remaining two sides are axial centers. The taper is disposed with a tapered positional relationship from O toward the mounting bolt 5.

  Therefore, even when the engine E is displaced relative to the body frame BF in the left-right direction of the body frame BF (arrow LR direction in FIG. 13) and the upper member 1 is brought into contact with the right side or the left side of the stopper restricting portion 22. The force due to the contact can be efficiently transmitted to the mounting bolt 5.

  Further, as shown in FIG. 8, the rib portion 22d is disposed on an imaginary straight line L connecting the mounting bolts 5 fixed to the vehicle body frame BF on both sides of the restricting portion 22a. In the displacement only in the direction (vertical direction in FIG. 13) and in the left-right direction of the body frame BF (arrow LR direction in FIG. 13), a rotational moment hardly occurs around the virtual straight line L, and the impact force of the restricting portion 22a is reduced. It can be received efficiently.

  The rib portion 22d has a tip arc portion 22d1 and a bottom arc portion 22d2. The tip arc portion 22d1 is a portion formed at a position corresponding to one of the above-mentioned triangular vertices, and has an arc shape when viewed from above (when viewed from the vertical direction in FIG. 8) with the axis O side recessed. It is configured.

  The bottom arc portion 22d2 is a portion formed at a position corresponding to the side facing the tip arc portion 22d1 among the three sides of the triangular shape described above, and is a top view in which the axis O side is recessed (perpendicular to FIG. 8). (Directional view) It has an arc shape. The bottom arc portion 22d2 is configured as an arc having a longer and gentler curvature than the tip arc portion 22d1.

  Further, since the rib portion 22d includes the tip arc portion 22d1, the durability of the stopper member 8 can be improved. That is, the tip arc portion 22d1 is configured to have a circular arc shape when viewed from above, with the axis O side being recessed, so that distortion caused by the force generated by the upper member 1 coming into contact with the restricting portion 22a can be dispersed. Therefore, the end arc portion 22d1 can be prevented from cracking due to distortion, and the durability of the stopper member 8 can be improved.

  Further, since the rib portion 22d includes the bottom arc portion 22d2, the durability of the stopper member 8 can be improved. In other words, the bottom arc portion 22d2 is configured to have a circular arc shape when viewed from above, with the axis O side recessed, so that the distortion caused by the force generated by the upper member 1 coming into contact with the restricting portion 22a can be dispersed. Therefore, the bottom arc portion 22d2 can be prevented from cracking due to distortion, and the durability of the stopper member 8 can be improved.

  Further, since the bottom arc portion 22d2 is formed in a gentle arc shape longer than the tip arc portion 22d1, the force generated by the upper member 1 coming into contact with the restricting portion 22a is efficiently transmitted to the stopper fixing portion 21. be able to.

  Further, as shown in FIG. 8, the tip arc portion 22d1 and the bottom arc portion 22d2 are located on an imaginary straight line L connecting the pair of bolts 5 on the stopper fixing portion 21, and as shown in FIG. The arc portion 22d1 is located on the stopper fixing portion 21, and the bottom arc portion 22d2 is located along the opening on the lower side (lower side in FIG. 9) of the wall portion 22b.

  That is, as shown in FIGS. 8 and 9, the rib portion 22d extends radially outward of the stopper overhanging portion 20 beyond the lower end of the opening of the inclined tube portion 22c (lower end of FIG. 9) and the stopper overhanging portion 20. It extends to the stopper fixing portion 21 disposed in the left-right direction in FIG. Further, the tip arc portion 22d1 of the rib portion 22d and the virtual straight line L intersect at a distance r from the axis O.

  In addition, since the inclined cylindrical portion 22c is formed by pressing from a flat plate, as shown in FIG. 9, the portion of the rib portion 22d bulging to the outside of the inclined cylindrical portion 22c corresponds to the inclined cylindrical portion 22c. The inner shape is recessed.

  For example, according to the conventional liquid-filled vibration isolator, a space is formed between the vibration isolator base 3 and the cover member that prevents dust and the like from adhering to the anti-vibration base 3 as in the first embodiment. In order to discharge rainwater that has entered the space to the outside, it is necessary to provide a drain hole. Therefore, there is a problem that the manufacturing cost of the liquid-filled vibration isolator increases due to the necessity of processing the drain hole, and there is a problem that the strength of the cover member is lowered because the hole is formed in the cover member.

  Here, according to the first embodiment, a space S (see FIGS. 5 and 6) is formed between the vibration isolating base 3 and the stopper member 8, and the rib portion 22 d of the stopper member 8 is formed. The tip arc portion 22d1 is located at a distance r from the axis O, the intermediate member 6 and the lower member 7 have the same axis O, the radius R3 of the intermediate member 6 and the radius of the lower member 7 R4 has a smaller dimension value than the distance r (R3 <r, R4 <r).

  Therefore, even when the intermediate member 6 is caulked and fixed between the stopper member 8 and the lower member 7, the distal end arc portion 22 d 1 of the rib portion 22 d is positioned radially outside the intermediate member 6 and the lower member 7. . That is, the rib portion 22 d extends to the radially outer side of the intermediate member 6 and the lower member 7. Therefore, since the dent (mainly the dent for the strength improvement of the stopper member 8) part formed in the inner surface of the rib part 22d is connected with the exterior, the rain water etc. which entered the space S can be discharged. it can.

  As a result, it is not necessary to provide a drain hole separately, and the rib portion 22d for improving the strength of the stopper member 8 is used. Therefore, the strength of the stopper member 8 is ensured while saving the trouble of processing the drain hole. The durability can be ensured while reducing the manufacturing cost of the liquid-filled vibration isolator 100. The manufacturing cost of the liquid filled type vibration damping device 100 can be reduced.

  FIG. 10A is a top view of the intermediate member 6, and FIG. 10B is a cross-sectional view of the intermediate member 6 taken along the line Xb-Xb of FIG.

  The intermediate member 6 is a member for improving the strength of the vibration isolation base 3 and connecting the vibration isolation base 3 (see FIGS. 5 and 6) to the stopper member 8. As shown in FIGS. 10 (a) and 10 (b), the intermediate member 6 has a cylindrical shape having an axis O and an opening (upper side in FIG. 10) extending from the flat plate of an aluminum alloy having a thickness T2. The intermediate member cylinder portion 30, the intermediate member inclined portion 31, and the intermediate member fixing portion 32 are provided.

  The intermediate member cylinder part 30 is a part for securing the strength of the vibration isolating base 3, and is configured in a cylindrical shape having an axis O as shown in FIGS. 10 (a) and 10 (b). , Has an inner diameter of radius R2. Further, an intermediate member inclined portion 31 is coupled to the opening on the upper side (the upper side in FIG. 10B) of the intermediate member cylindrical portion 30.

  The intermediate member inclined portion 31 is a portion to which the anti-vibration base 3 is vulcanized and bonded, and as shown in FIG. 10 (b), the intermediate member inclined portion 31 is configured in a cylindrical shape having an axis O and an upwardly opening. It has an inner diameter of radius R2. Further, an intermediate member fixing portion 32 is coupled to the opening on the upper side (the upper side in FIG. 10B) of the intermediate member inclined portion 31.

  The intermediate member fixing portion 32 is a portion that is sandwiched between the lower member 7 (see FIG. 6) and the stopper member 8 (see FIG. 6) (see FIG. 6). FIG. 10 (a) and FIG. As shown to (b), it protrudes in the shape of a flange from the opening part of the upper side of the intermediate member inclination part 31 to the radial direction outer side (FIG. 10 left-right direction outer side). The intermediate member fixing portion 32 is configured in an annular flat plate shape having an outer diameter of a radius R3 and an axis O as viewed from above (see FIG. 10A as viewed in the direction perpendicular to the paper surface).

  Further, the intermediate member 6 has the same axis O as the partition body 14 (see FIGS. 5 and 6), and the radius R2 of the inner diameter of the intermediate member cylinder portion 30 of the intermediate member 6 is the outer diameter of the partition body 14. Is set to a value smaller than the radius R0. Therefore, when the intermediate member 6 is caulked and fixed by the lower member 7, the intermediate member cylinder portion 30 of the intermediate member 6 covers the outer edge of the partition body 14 via the partition body receiving step portion 3 c (see FIGS. 5 and 6). The partition 14 is firmly pressed against the lower member 7 (see FIGS. 5 and 6).

  Therefore, as compared with the case where the partition body receiving step 3c is pressed only, the partition body 14 can be more securely fixed and the occurrence of chatter (vibration) at the time of large displacement input or in a high frequency region can be suppressed.

  FIG. 11 is a top view of the lower member 7 and shows a state in which the bent piece 45 is not bent. 12A is a cross-sectional view of the lower member 7 taken along line XIIa-XIIa in FIG. 11, and FIG. 12B is a cross-sectional view of the lower member 7 taken along line XIIb-XIIb in FIG. FIG. 12C is a cross-sectional view taken along line XIIb-XIIb in FIG. 11 in a state where the flexible rubber portion 9 and the covering rubber portion 10 are disposed inside the lower member 7.

  As shown in FIGS. 11 and 12 (b), the lower member 7 is press-molded into a cylindrical shape having an axis O and an opening extending upward from a flat plate of an aluminum alloy having a thickness T3. A side member lower tube portion 40, a lower member bottom portion 41, a lower member upper tube portion 42, a lower member inclined portion 43, a lower member fixing portion 44, and a bent piece 45 are provided.

  As shown in FIGS. 12 (a) and 12 (b), the lower member lower cylinder portion 40 is formed in a cylindrical shape having an axis O, and the lower member bottom portion 41 is coupled to the upper opening thereof. Has been. The lower member bottom portion 41 is a portion with which the partition member 14 (see FIGS. 5 and 6) is in contact with the covering rubber portion 10 (see FIGS. 5 and 6), and the lower member lower cylinder portion 40. Is formed in an annular flat plate shape having the same axis O as viewed from above (viewed in the direction perpendicular to the plane of FIG. 11). That is, the lower member bottom portion 41 has a lower rigidity of the lower member lower cylinder portion 40, and thus the rigidity of the lower member bottom portion 41 is increased. Therefore, the partition member 14 can be firmly fixed.

  Further, as shown in FIGS. 12A and 12B, a lower member upper tube portion 42 is erected from the outer edge of the lower member bottom portion 41 toward the side opposite to the lower member lower tube portion 40. ing. The lower member upper tube portion 42 is formed in a cylindrical shape having the same axis O as the lower member lower tube portion 40, and the inner peripheral surface thereof is covered by the outer diameter of the covering rubber portion 10. The inner diameter of the rubber part 10 is small.

  Therefore, the covering rubber portion 10 is compressed and deformed by fitting the partition body 14 (see FIGS. 5 and 6) into the covering rubber portion 10 (see FIGS. 5 and 6). The elastic restoring force of the rubber part 10 acts on the partition 14 as a holding force. As a result, it is possible to securely fix the partition body 14 and to suppress the occurrence of chatter (vibration) when a large displacement is input or in a high frequency region.

  Further, a lower member inclined portion 43 is coupled to the upper opening of the lower member upper cylinder portion 42. The lower member inclined portion 43 is formed in a cylindrical shape having the same axis O as the lower member lower cylindrical portion 40 and having an upwardly widened opening, and the inner side surface of the lower member inclined portion 43 is The upper member 1 is formed in parallel with the lower surface 1e (see FIGS. 5 and 6) of the outer edge (inclination angle within ± 10 ° in the cross section including the axis O).

  Therefore, when the upper member 1 (see FIGS. 5 and 6) is displaced in the vertical direction (the vertical direction in FIGS. 5 and 6), force is uniformly transmitted from the outer edge lower surface 1e to the lower member inclined portion 43. Therefore, the force applied to the vibration isolating substrate 3 (see FIGS. 5 and 6) becomes uniform, the occurrence of cracks in the vibration isolating substrate 3 can be prevented, and the durability of the vibration isolating substrate 3 can be improved.

  A lower member fixing portion 44 is coupled to the upper opening of the lower member inclined portion 43. The lower member fixing portion 44 is a portion attached to the stopper overhanging portion 20 (see FIG. 10) of the intermediate member 6.

  As shown in FIG. 11, the lower member fixing portion 44 has an outer diameter of a radius R4 and is configured in an annular flat plate shape as viewed from above having the same axis O as the lower member lower cylindrical portion 40. A pair of fixed portion overhangs 44a are provided that project from the outer periphery of the two locations facing each other 180 ° across the axis O toward the radially outer side.

  As shown in FIG. 11, the fixed portion overhang 44 a extends in a range of a central angle of 86 ° centered on the axis O, and is a top view (viewed in the vertical direction in FIG. 11) centered on the axis O. It is configured in shape. Moreover, as shown in FIG. 11, the bending piece 45 is coupled with the outer periphery of the fixing | fixed part overhang | projection 44a.

  The bent piece 45 is a member for caulking and fixing the intermediate member fixing portion 32 of the intermediate member 6 and the stopper overhanging portion 20 (see FIGS. 8 and 9) of the stopper member 8, and FIGS. As shown in a) and FIG. 12B, the shaft is erected from the fixed portion overhang 44a toward the side opposite to the lower member inclined portion 43 (upper side in FIGS. 12A and 12B). A top view (viewed in the vertical direction in FIG. 11) centering on O is formed in an arc shape.

  In addition, the coupled portion on the axis O side of the coupled portion of the fixed portion overhang 44a and the bent piece 45 is a cross-section arc section having a central angle of 90 ° in the section including the axis O. It is formed in the shape of. In addition, the circular arc is comprised by curvature R6 (refer Fig.14 (a)). The bent piece 45 includes a central bent piece 45a and end bent pieces 45b coupled to both sides of the central bent piece 45a.

  As shown in FIG. 12 (b), a line 45a1 connecting the leading ends of the central bent piece 45a in the standing direction (upward direction in FIG. 12 (b)) is a lower surface 44a1 (see FIG. b) It is constituted as a straight line parallel to the lower surface).

  Further, the height from the lower surface 44a1 (the lower surface in FIG. 12 (b)) of the fixed portion overhang 44a to the tip of the end bent piece 45b (FIG. 14 (b) vertical dimension value) is from the central bent piece 45a. It becomes lower as it gets away.

  Therefore, when the bent piece 45 is caulked with a caulking jig, the end bent pieces 45b, which are both ends of the bent piece 45, can be prevented from being bent as compared with the central bent piece 45a. Further, by pushing and bending (turning back) the coupled portion of the end bent piece 45b and the fixed portion overhang 44a without crushing, the strength reduction of the bent piece 45 is prevented, and the liquid-filled vibration isolator The durability of 100 can be improved. The process of pushing and bending (folding back) the bent piece 45 will be described later.

  A line 45b1 connecting the end portions of the end bent pieces 45b is formed in an arc shape having a radius R5 (see FIG. 14A) protruding in the protruding direction of the bent pieces 45, and the line 45b1 Is configured in the shape of an arc-shaped arc portion having a central angle of 90 °. That is, the center of the radius R5 is disposed at an equal distance from the tip of the bent piece 45 and the end of the bent piece 45.

  Therefore, the tip of the bent piece 45 and the end of the bent piece 45 become a tangent line in contact with the arc of radius R5, and the caulking jig can smoothly come into contact with the arc of radius R5 from the tip of the bent piece 45. it can. Similarly, the caulking jig can smoothly come into contact with the tip of the bent piece 45 from the arc having the radius R5.

  As a result, since the force from the caulking jig is smoothly transmitted to the bent piece 45, the bent piece 45 can be stably pushed and bent (turned back), and the continuous portion 44a and the bent piece 45 can be connected to each other. It is possible to prevent the coupled portion on the axis O side from being crushed at the formed portion, and to improve the durability of the liquid filled type vibration damping device 100.

  As described above, the entire circumference of the inner peripheral surface of the lower member 7 (the inner peripheral surface of the lower member upper cylindrical portion 42 and the lower member inclined portion 43 and the upper surface of the lower member bottom portion 41) is shown in FIG. As shown in c), the covering rubber portion 10 is vulcanized and bonded, and a flexible rubber portion is provided around the lower end of the covering rubber portion 10 (the lower end portion in FIG. 12 (c)). 9 are coupled.

  The covering rubber portion 10 includes a covering end portion 10a vulcanized and bonded to the inner peripheral surface of the lower member lower cylinder portion 40, and a covering bottom portion 10b vulcanized and bonded to the inner peripheral surface of the lower member bottom portion 41. And a covering cylinder portion 10c vulcanized and bonded to the inner peripheral surface of the lower member upper cylinder portion 42, and a covering inclined portion 10d vulcanized and bonded to the inner peripheral surface of the lower member inclined portion 43. ing.

  For example, when the covering rubber portion 10 is not extended to the lower member lower cylinder portion 40 side, and the flexible rubber portion 9 is coupled from a portion vulcanized and bonded to the lower member bottom portion 41. When the engine E is displaced with respect to the vehicle body frame BF and the flexible rubber portion 9 moves in the vertical direction (12 (c) vertical direction), the covering rubber portion 10 moves in the vertical direction of the flexible rubber portion 9. Therefore, the covering rubber portion 10 moves in a direction orthogonal to the vulcanization bonding surface, and the covering rubber portion 10 is easily peeled off from the lower member bottom portion 41.

  In contrast, in the first embodiment, the covering end portion 10a is vulcanized on the inner peripheral surface of the lower member lower tube portion 40 extending along the axis O direction (12 (c) vertical direction). Since it is bonded, the durability of the covering rubber part 10 can be improved.

  That is, even if the flexible rubber portion 9 moves in the vertical direction (12 (c) vertical direction), most of the force acting on the covered end portion 10a from the flexible rubber portion 9 is on the lower side of the covered end portion 10a. It does not act in the direction of peeling from the member lower cylinder part 40 (direction orthogonal to the bonding surface, 12 (c) left-right direction). Therefore, it is possible to improve the durability of the covering rubber portion 10 by suppressing the covering end portion 10a from peeling from the lower member lower tube portion 40.

  Further, the covering end portion 10a is wider than the thickness of the flexible rubber portion 9 (FIG. 12 (c) vertical dimension value) and is vulcanized and bonded to the inner peripheral surface of the lower member lower cylinder portion 40. By widening the bonding area, it is possible to make the covering end portion 10a difficult to peel off and improve the durability of the covering rubber portion 10.

  Moreover, the covering bottom part 10b is attached to the upper surface of the lower member bottom part 41 as shown in FIG.12 (c), and the partition body 14 (FIG.5 and FIG.5) from the upper direction (FIG.12 (c) upper direction). 6) is provided. Since the partition 14 is pressed downward (downward in FIG. 12C) by the vibration isolating base 3, the covering bottom 10b is located between the upper surface of the lower member bottom 41 and the lower surface of the partition 14. Pinched. Therefore, for example, even when the covering end portion 10a is peeled off, the covering bottom portion 10b coupled to the covering end portion 10a can be prevented from peeling off.

  Further, in the section including the axis O, the covering inclined portion 10d is thinner in the upper part (upper side in FIG. 12C) than in the lower part (lower part in FIG. 12C). And has a tapered cross section continuously connected to the upper surface of the lower member fixing portion 44 (the upper surface in FIG. 12C).

  Therefore, when the vibration isolating base 3 is fitted, the surface formed in a tapered shape on the lower side of the outer periphery of the vibration isolating base 3 (the lower side in FIGS. 5 and 6) is the covering inclined portion 10d. Be guided by. Therefore, the anti-vibration base 3 and the diaphragm member 2 can be centered by simply fitting the anti-vibration base 3 into the diaphragm member 2. As a result, the assembly work of the liquid filled type vibration damping device 100 is simplified, and the manufacturing cost of the liquid filled type vibration damping device 100 can be reduced.

  Next, with reference to FIG. 13, the mounting direction of the liquid-filled vibration isolator 100 will be described. FIG. 13 is a top view of the liquid-filled vibration isolator 100 as seen from the direction of arrow XIII in FIG. The arrow U is the upward direction of the body frame BF, the arrow D is the downward direction of the body frame BF, the arrow L is the left direction of the body frame BF, the arrow R is the right direction of the body frame BF, and the arrow F is The forward direction of the body frame BF and the arrow B indicate the backward direction of the body frame BF, respectively.

  As shown in FIG. 13, the liquid-filled vibration isolator 100 is fastened to the vehicle body frame BF via a pair of mounting bolts 5 with the lower portion inserted into the vehicle body frame BF (see FIG. 1). The bracket BL is fastened via the mounting bolt 4. The liquid-filled vibration isolator 100 is disposed in a direction in which a virtual straight line L connecting the pair of bolts 5 disposed on the stopper fixing portion 21 of the liquid-filled vibration isolator 100 is the left-right direction of the vehicle body frame BF. The pair of rib portions 22d are arranged on the virtual straight line L so as to face each other with the upper member 1 interposed therebetween, which is parallel to the arrow LR direction.

  Therefore, as shown in FIG. 13, in the first embodiment in which the virtual straight line L faces the left-right direction of the vehicle body frame BF (the direction of the arrow LR in FIG. 13), the stopper member is relative to the front-rear direction of the vehicle body frame BF. Thus, the rigidity of the stopper member 8 can be ensured efficiently, and the stopper action can be reliably exhibited, and the durability of the stopper member 8 can be improved.

  That is, even when the vehicle lateral direction (in the direction of the arrow LR, for example, when the stopper action at the time of roll input or sudden start is required) is required as the direction in which the stopper action is particularly necessary, As in the present embodiment shown in FIG. 13, the liquid-filled vibration isolator 100 is arranged with the virtual straight line L facing in the left-right direction of the body frame BF, so that the rigidity of the stopper member 8 in this direction can be increased. It can be secured efficiently.

  In addition, as described above, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from the top, and therefore, it is possible to efficiently secure rigidity and achieve both improvement in durability and weight reduction. Can do.

  That is, the upper member 1 is a member connected to the vibration isolating base 3 and is elastically supported by the vibration isolating base 3, so that the input region has a size that does not exhibit the stopper action. The rigidity required for the mounting surface 1f of the upper member 1 is relatively small. Therefore, the area of the attachment surface 1f can be made relatively small.

  On the other hand, when the stopper is actuated, the upper member 1 abuts against the stopper member 8, and the mounting surface 1f of the upper member 1 receives a load in the prying direction from the bracket BL, so that a relatively large rigidity is required. Therefore, it is necessary to make the area of the attachment surface 1f relatively large in the direction in which the stopper action needs to be exhibited.

  In this case, according to the liquid-filled vibration isolator 100 in the first embodiment, as shown in FIG. 13, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and the major axis direction of the elliptical shape Is matched with the direction of the imaginary straight line L, so that the area of the portion where the rigidity strength is required can be increased, the damage of the mounting surface can be suppressed, and the area of the portion where the rigidity strength is relatively not required. It is possible to reduce the weight of the upper member 1 by reducing the size. That is, it is possible to efficiently ensure the rigidity and strength of the upper member 1 and achieve both improvement in durability and weight reduction.

  Next, with reference to FIG. 14, the process of pushing (bending) the bent piece 45 with a caulking jig (not shown) will be described. 14A is a partially enlarged side view of the bent piece 45 in which the portion indicated by XIV in FIG. 12 is enlarged, and shows a state in which the intermediate member fixing portion 32 and the stopper overhanging portion 20 are disposed. ing. Note that forces F1 to F3 from the caulking jig are applied to the bent piece 45, and a state immediately before the bending piece 45 starts to be deformed is shown.

FIG. 14C is a partially enlarged side view of the bent piece 45 being deformed from the state shown in FIG. FIG. 14E is a partially enlarged side view of the bent piece 45 that has been deformed from the state shown in FIG.
14 (b), 14 (d), and 14 (f) are views in the direction of arrow XVIb, the direction of arrow XVId, and the direction of arrow XVIf in FIGS. 14 (a), 14 (c), and 14 (e). It is a side view of each bending piece 45 in vision. Also, black spots P1 to P5 shown in FIGS. 14 (a) to 14 (f) indicate portions where forces F1 to F5 from the caulking jig are applied, and P1 to P5 correspond to F1 to F5. is doing. Further, in order to facilitate understanding, the force is the force F1 to the force F5 and the black point is the five points of the black points P1 to P5.

  The forces F1 to F5 from the caulking jig indicate the direction of the force, not the magnitude of the force. In FIGS. 14 (a) to 14 (f), the drawings are simplified. Therefore, the description of the reaction forces F1 to F5 applied to the lower member fixing portion 44 is omitted.

  As shown in FIG. 14 (a), the force F1 of the caulking jig is formed at the tip of the bent piece 45 in the standing direction (upward direction in FIG. 14 (a)) and above the bent piece 45 (see FIG. 12 (b)). ) From the upper right side to the lower inner side (lower side in FIG. 12B). As shown in FIG. 14B, the caulking jig force F1 acts on the portion indicated by the black point P1 at the tip portion of the central bent piece 45a.

  Then, the force F1 of the caulking jig is increased, and as shown in FIG. 14C, the central bent piece 45a on which the caulking jig force F1 is applied starts to bend gradually, and the central bent piece 45a is gradually bent. Is bent, the end bent piece 45b is bent. At the same time, the tip of the central bent piece 45a is also bent, so that the caulking jig comes into contact with the black spots P2, P3, P4 of the end bent piece 45b in order, and FIGS. 14 (c) and 14 (d). As shown in FIG. 4, the force F2, F3, F4 of the caulking jig acts on the black spots P2, P3, P4 of the end bent piece 45b in order. That is, the force from the caulking jig moves toward the end of the bent piece 45.

  If the bending piece 45 is continuously bent while maintaining the crimping jig forces F1, F2, F3, and F4, the crimping jig force is further applied to the end bending piece 45b side (left side in FIG. 14 (d)). The position where the action acts continues to move.

  14 (e), the bent piece 45 is brought into contact with the stopper overhanging portion 20, and the stopper overhanging portion 20 and the intermediate member fixing portion 32 are connected to the bent piece 45 and the lower member fixing portion. When it is caulked and fixed to 44, as shown in FIG. 14 (f), the force F5 of the caulking jig acts on the black spot P5 which is the end portion side of the end bent piece 45b.

  That is, the height from the lower surface 44a1 (the lower surface in FIG. 14B) of the fixed portion overhang 44a to the tip of the end bent piece 45b (the dimension value in the vertical direction in FIG. 14B) is from the central bent piece 45a. A radius R5 of the line 45b1 connecting the tips of the end bent pieces 45b is convex in the protruding direction of the end bent pieces 45b, and becomes lower as the distance is increased (leftward in FIG. 14B). The arc shape is configured as shown in FIG.

  Therefore, the position where the force of the caulking jig is applied gradually approaches the end of the bent piece 45, so that the end bent piece 45b is gradually bent and fixed to the end bent piece 45b. It is possible to prevent the coupling portion with the overhang 44a from being crushed (the arc shape is not maintained) and to reduce the deformation amount of the coupling portion. Therefore, it is possible to improve the durability of the bent piece 45 while preventing a decrease in strength due to deformation.

  For example, when the line 45b1 connecting the tip portions of the end bent pieces 45b is formed in a concave arc shape in the projecting direction of the end bent pieces 45b, the tip portions of the end bent pieces 45b are Since the wire 45b1 is close to the fixed portion overhang 44a, the end bent piece 45b and the fixed portion overhang 44a are compared with the case where the line 45b1 is formed in a convex arc shape in the protruding direction of the end bent portion 45b. There is a problem that a large force is applied to the coupled portion and the coupled portion is crushed (the arc shape is not maintained).

  On the other hand, in the first embodiment, the wire 45b1 is formed in an arc shape that is convex in the projecting direction of the end bent piece 45b, so that the distal end of the end bent piece 45b is fixed to the fixed portion. The end bent piece 45b can be pushed and bent (turned back) with respect to the lower member fixing portion 44 in a state where the distance from 44a is maintained. Therefore, a large force is prevented from being applied to the coupled portion of the end bent piece 45b and the fixed portion overhang 44a, and the coupled portion is prevented from being crushed (the arc shape is not maintained). The amount of deformation of the portion can be reduced. Therefore, it is possible to improve the durability of the bent piece 45 while preventing a decrease in strength due to deformation.

  Further, the height from the upper surface of the fixed portion overhang 44a of the black spot P6, which is a portion where the arc shape of the tip of the end bent piece 45b and the end of the end bent piece 45b are connected, is determined by the stopper. The protruding portion 20 and the intermediate member fixing portion 32 are configured to be lower than the overlapped height, and the caulking jig is not brought into contact therewith. Therefore, since the force of the caulking jig does not act from above the end of the end bent piece 45b, the coupled portion between the end bent piece 45b and the fixed portion overhang 44a is crushed (the arc shape is maintained). The amount of deformation of the coupled portion can be reduced. Therefore, the durability of the bent piece 45 can be improved by preventing the strength from being lowered due to deformation.

  Further, the coupled portion of the end bent piece 45b and the fixed portion overhang 44a is formed in an arc shape having a curvature R6 in a cross section including the axis O before being crimped.

  Further, the end bent piece 45b, which is the end of the bent piece 45, is a portion where the force tends to concentrate, and is a portion from which the bent piece 45 is damaged. Here, in 1st Embodiment, since the edge part bending piece 45b is located in the both ends of the bending piece 45, the durability of the edge part bending piece 45b is improved, and a center bending is carried out. The breakage of the piece 45a can be prevented, and the durability of the bent piece 45 can be improved.

  In the first embodiment, the plate thickness dimension T1 is set to 2 mm, and the radius R5 of the arc 45b1 formed by the line connecting the end portions of the end bent pieces 45b is four times the plate thickness dimension T1. It is preferably set to 8 mm, and the radius R5 is preferably set to be not less than 1 and less than 5 times the plate thickness dimension T1.

  For example, when the radius R5 is set to be 5 times or more of the plate thickness dimension T1, the bent piece 45 is more than the plate thickness dimension T1. The area in contact with the contact becomes smaller.

  As a result, the range for supporting the impact force acting on the stopper member 8 is reduced, and it is difficult not only to securely fix the stopper member 8 by caulking, but also the bent piece 45 is damaged.

  On the other hand, when the radius R5 is set to be less than 5 times the plate thickness dimension T1, the above-described problems are solved and the durability of the bent piece 45 can be ensured.

  Further, for example, when the radius R5 is set to be less than 1 time of the plate thickness dimension T1, the bent piece 45 is more likely to protrude from the stopper member 8 than when the radius R5 is set to 1 time or more of the plate thickness dimension T1. The area in contact with the portion 20 is reduced.

  That is, since the position where the force of the caulking jig is applied is close to the end of the bent piece 45, the end bent piece 45b is bent smaller, so that the end bent piece 45b and the fixed portion overhang are bent. The curvature of the coupled portion with 44a is reduced. Therefore, there is a problem in that the strength of the coupled portion between the end bent piece 45b and the fixed portion overhang 44a is lowered due to the decrease in curvature, and the durability of the bent piece 45 is lowered.

  On the other hand, when the radius R5 is set to 1 or more times the plate thickness dimension T1, the above-described problems are solved, and the durability of the bent piece 45 can be ensured.

  Here, in 1st Embodiment, plate | board thickness dimension T1 is set to 2 mm, and the line which connects the front-end | tip part of the edge part bending piece 45b is set to 8 mm which is a value 4 times the plate | board thickness dimension T1. Therefore, it is possible to secure the caulking and fixing of the stopper member 8 and to improve the durability of the bent piece 45 by improving the strength of the end bent piece 45b.

  Further, the curvature R6 in the cross section including the axis O of the coupling portion on the axis O side at the coupling portion of the fixed portion overhang 44a and the bent piece 45 is set to 0.6 times or more of the plate thickness dimension T1. It is preferable to do this.

  For example, when the curvature R6 is set to be less than 0.6 times the plate thickness T1, the impact force transmitted from the stopper member 8 when the bent piece 45 is bent and the stopper member 8 is fixed. However, there is a problem that the bent piece 45 is damaged due to concentrated action on the coupled portion of the fixed portion overhang 44a and the bent piece 45.

  On the other hand, in the first embodiment, since the curvature R6 is set to 1 mm which is 0.6 times or more of the plate thickness dimension T1, the above-described problem is solved and the breakage of the bent piece 45 is prevented. can do.

  In addition, since the line 45a1 connecting the distal end portion of the central bent piece 45a is configured in parallel to the lower surface of the lower member fixing portion 44, the distal end portion of the central bent piece 45a can exert the force of the caulking jig. Can be received evenly. Therefore, the curvature of the coupled portion between the central bent piece 45a and the lower member fixing portion 44 can be made uniform. As a result, the durability of the central bent piece 45a can be improved by preventing a partial strength reduction of the central bent piece 45a.

  Further, according to the first embodiment, the lower member 7 includes the bent piece 45, and an intermediate portion is provided between the lower member fixing portion 44 of the lower member 7 and the stopper overhanging portion 20 of the stopper member 8. By holding the intermediate member fixing portion 32 of the member 6 and folding it back toward the stopper overhanging portion 20 side of the bent piece 45 stopper member 8 of the lower member 7, the lower member 7 and the stopper member 8 are connected to the intermediate member. Since it is the structure attached to 6, the work efficiency at the time of manufacture can be improved.

  That is, as described above, according to the liquid-filled vibration isolator 100 of the present embodiment, the thickness T1 of the stopper member 8 is large and the stopper member 8 is thick. T1 can be made smaller than the plate thickness dimension T2 of the lower member 7, and the plate | board thickness of the lower member 7 can be comprised thinly.

  That is, the lower member 7 is not required to be stronger than the stopper member 8 because the upper member 1 and the vehicle body frame BF are not in contact with each other when the engine E is largely displaced. Therefore, it can be made thinner than the stopper member 8. Therefore, by forming the bent piece 45 on the lower member 7 and bending the bent piece 45, the bending work can be facilitated as compared with the case where the bent piece is formed on the stopper member 8. Therefore, the work efficiency at the time of manufacture can be improved.

  Next, a second embodiment will be described with reference to FIGS. 15 and 16. FIG. 15 is a side view of the liquid-filled vibration isolator 100 according to the second embodiment, and FIG. 16 is a top view of the liquid-filled vibration isolator 100 viewed from the direction of the arrow XVI in FIG. As in the case described above, arrows UD, LR, and FB in FIG. 16 indicate the vertical direction, the left-right direction, and the front-rear direction of the vehicle frame BF, respectively. The same applies to FIG. 21, FIG. 24 and FIG.

  In the first embodiment, a case has been described in which the liquid-filled vibration isolator 100 supports the engine E on the vehicle body frame BF in a state where the virtual straight line L faces the left-right direction of the vehicle body frame BF (the left-right direction in FIG. 1). However, in the second embodiment, the liquid-filled vibration isolator 100 supports the engine E on the vehicle body frame BF in a state where the virtual straight line L faces the intermediate direction between the front-rear direction and the left-right direction of the vehicle body frame BF. It is configured as follows. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment, and the description is abbreviate | omitted.

  Here, the liquid filled vibration isolator 100 according to the second embodiment has an attachment position (rotational position) with respect to the vehicle body frame BF with respect to the liquid filled vibration isolator 100 described in the first embodiment. The only difference is the configuration of the liquid-filled vibration isolator 100 itself, and the description thereof will be omitted.

  As described above, in the liquid-filled vibration isolator 100, the pair of stopper fixing portions 21 are disposed at positions facing each other with the stopper regulating portion 22 interposed therebetween, and the pair of rib portions 22d sandwich the upper member 1. 16, the virtual straight line L is arranged at a position on the virtual straight line L while facing each other. Therefore, as shown in FIG. 16, the virtual straight line L extends in the longitudinal direction of the vehicle body frame BF (arrow FB direction in FIG. 16). In the second embodiment, which is in the middle of the direction (arrow LR direction in FIG. 16), the rigidity of the stopper member 8 is increased in both the front-rear direction and the left-right direction of the body frame BF. While ensuring efficiently, a stopper effect | action can be exhibited reliably, and the improvement of durability of the stopper member 8 can be aimed at.

  That is, the direction in which the stopper action is particularly required includes the vehicle front-rear direction (in the direction of arrow FB, for example, when a stopper action is required at the time of collision or vehicle connection), and the vehicle left-right direction (in the direction of arrow LR, For example, even when both directions are required, such as when a roll is input or when a stopper action is required at the time of sudden start, the vehicle body frame BF is used as in the present embodiment shown in FIGS. By arranging the liquid-filled vibration isolator 100 in a state where the virtual straight line L faces in the middle direction between the front and rear directions and the left and right directions, it is possible to efficiently ensure the rigidity and strength of the stopper member 8 in both directions. it can.

  In addition, as described above, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from the top, and therefore, it is possible to efficiently secure rigidity and achieve both improvement in durability and weight reduction. Can do.

  That is, the upper member 1 is a member connected to the vibration isolating base 3 and is elastically supported by the vibration isolating base 3, so that the input region has a size that does not exhibit the stopper action. The rigidity required for the mounting surface 1f of the upper member 1 is relatively small. Therefore, the area of the attachment surface 1f can be made relatively small.

  On the other hand, when the stopper is actuated, the upper member 1 abuts against the stopper member 8, and the mounting surface 1f of the upper member 1 receives a load in the prying direction from the bracket BL, so that a relatively large rigidity is required. Therefore, it is necessary to make the area of the attachment surface 1f relatively large in the direction in which the stopper action needs to be exhibited.

  In this case, according to the liquid-filled vibration isolator 100 in the second embodiment, as shown in FIG. 16, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and the major axis direction of the elliptical shape Is matched with the direction of the imaginary straight line L, so that the area of the portion where the rigidity strength is required can be increased, the damage of the mounting surface can be suppressed, and the area of the portion where the rigidity strength is relatively not required. It is possible to reduce the weight of the upper member 1 by reducing the size. That is, it is possible to efficiently ensure the rigidity and strength of the upper member 1 and achieve both improvement in durability and weight reduction.

  Next, a third embodiment will be described with reference to FIGS. 17 and 18. FIG. 17 is a side view of the liquid-filled vibration isolator 100 according to the third embodiment, and FIG. 18 is a top view of the liquid-filled vibration isolator 100 as viewed from the direction of the arrow XVIII in FIG.

  In the first embodiment, a case has been described in which the liquid-filled vibration isolator 100 supports the engine E on the vehicle body frame BF in a state where the virtual straight line L faces the left-right direction of the vehicle body frame BF (the left-right direction in FIG. 1). However, in the third embodiment, the liquid-filled vibration isolator 100 is configured to support the engine E on the vehicle body frame BF with the virtual straight line L facing the front-rear direction of the vehicle body frame BF. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  Here, the liquid-filled vibration isolator 100 according to the third embodiment has a mounting position (rotational position) with respect to the vehicle body frame BF with respect to the liquid-filled vibration isolator 100 described in the first embodiment. The only difference is the configuration of the liquid-filled vibration isolator 100 itself, and the description thereof will be omitted.

  As described above, in the liquid-filled vibration isolator 100, the pair of stopper fixing portions 21 are disposed at positions facing each other with the stopper regulating portion 22 interposed therebetween, and the pair of rib portions 22d sandwich the upper member 1. , The virtual straight line L faces the front-rear direction of the vehicle body frame BF (arrow F-B direction in FIG. 18) as shown in FIG. In the third embodiment, the rigidity of the stopper member 8 can be efficiently ensured with respect to the front-rear direction of the vehicle body frame BF, and the stopper function can be reliably exhibited, and the durability of the stopper member 8 can be ensured. Can be improved.

  That is, when the direction in which the stopper action is particularly required is the vehicle longitudinal direction (in the direction of arrow FB, for example, when the stopper action is required at the time of collision or vehicle connection), FIG. As in the present embodiment shown in FIG. 18, the liquid-filled vibration isolator 100 is arranged with the virtual straight line L facing in the front-rear direction of the body frame BF, so that the rigidity strength of the stopper member 8 in this direction is increased. It can be secured efficiently.

  Further, according to the liquid-filled vibration isolator 100 in the present embodiment, as shown in FIG. 18, the attachment surface 1f of the upper member 1 is configured in an elliptical shape when viewed from above, and the major axis direction of the elliptical shape is a virtual straight line. Since it is made to correspond to the direction of L, the area of the part where rigidity strength is required can be increased, the damage of the mounting surface can be suppressed, and the area of the part where rigidity strength is relatively not required can be reduced. And the weight reduction of the upper member 1 can be achieved. That is, as in the case of each of the above embodiments, it is possible to efficiently ensure the rigidity strength of the upper member 1 and achieve both improvement in durability and weight reduction.

  Next, a fourth embodiment will be described with reference to FIGS. FIG. 19 is a side view of the liquid filled type vibration damping device 100 according to the fourth embodiment, and shows a state in which the engine E is supported on the vehicle body frame 4BF. 20 is a top view of the liquid-filled vibration isolator 100, and FIG. 21 is a top view of the liquid-filled vibration isolator 100 as viewed from the direction of the arrow XXI in FIG.

  In the first embodiment, the case where the mounting surface of the vehicle body frame BF is parallel to the horizontal plane has been described. However, in the fourth embodiment, the mounting surface of the vehicle body frame 4BF is configured to be inclined downward toward the engine E. Has been. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  Here, the liquid-filled vibration isolator 100 of the fourth embodiment is inclined with respect to the body-filled frame BF, 4BF attached to the liquid-filled vibration isolator 100 described in the first embodiment ( The only difference is the mounting angle), and the configuration of the liquid-filled vibration isolator 100 itself is the same. In the present embodiment, the inclination angle of the body frame 4BF is 45 degrees.

  As described above, in the liquid-filled vibration isolator 100, the pair of stopper fixing portions 21 are disposed at positions facing each other with the stopper regulating portion 22 interposed therebetween, and the pair of rib portions 22d sandwich the upper member 1. In FIG. 21, the virtual straight line L faces the left and right direction of the vehicle body frame BF (arrow L-R direction in FIG. 21). In the fourth embodiment, the rigidity and strength of the stopper member 8 can be efficiently ensured with respect to the left and right direction of the vehicle body frame BF, so that the stopper action can be reliably exerted, and the durability of the stopper member 8 can be ensured. Can be improved.

  That is, when the direction in which the stopper action is particularly required is the vehicle left-right direction (in the direction of the arrow LR, for example, when the stopper action is required at the time of roll input or sudden start), FIG. As shown in the present embodiment shown in FIG. 21, the liquid-filled vibration isolator 100 is arranged with the virtual straight line L facing in the left-right direction of the body frame BF, so that the rigidity strength of the stopper member 8 in this direction is set. Can be secured efficiently.

  Further, in the present embodiment, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and the major axis direction of the elliptical shape is the inclination direction of the vehicle body frame 4BF as shown in FIG. Therefore, the rigidity and strength can be efficiently secured to achieve both improvement in durability and weight reduction.

  That is, the liquid-filled vibration isolator 100 according to the present embodiment is interposed between the engine E and the vehicle body frame 4BF inclined downward toward the engine E as shown in FIG. Due to the inclination of the vehicle body frame 4BF, a load in the twisting direction from the bracket 4BL is always applied to the attachment surface 1f. For this reason, the mounting surface 1f of the upper member 1 requires a relatively large rigidity and strength at portions where the load in the twisting direction acts (that is, both sides in the inclination direction of the vehicle body frame 4BF). There is a need to.

  Therefore, like the liquid-filled vibration isolator 100 according to the present embodiment, the mounting surface 1f of the upper member 1 is configured to be elliptical when viewed from above, and the major axis direction of the elliptical shape coincides with the inclination direction of the vehicle body frame 4BF. By doing so, it is possible to increase the area of the portion where the rigidity strength is required and suppress the breakage of the attachment surface 1f, and to reduce the area of the portion where the rigidity strength is not relatively required, thereby reducing the upper member 1. Can be reduced in weight. That is, it is possible to efficiently ensure the rigidity and strength of the upper member 1 and achieve both improvement in durability and weight reduction.

  Next, a fifth embodiment will be described with reference to FIGS. FIG. 22 is a side view of the liquid filled type vibration damping device 500 according to the fifth embodiment, and shows a state in which the engine E is supported on the vehicle body frame 4BF. FIG. 23 is a top view of the liquid-filled vibration isolator 500, and FIG. 24 is a top view of the liquid-filled vibration-proof device 500 viewed from the direction of arrow XXIV in FIG.

  In the first embodiment, the liquid-filled vibration isolator is installed in a state where the mounting surface of the body frame BF is parallel to the horizontal plane and the virtual straight line L faces the left-right direction (left-right direction in FIG. 1) of the body frame BF. The case where the engine 100 supports the engine E on the vehicle body frame BF has been described, but in the fifth embodiment, the mounting surface of the vehicle body frame 4BF is configured to be inclined downward toward the engine E, and the virtual straight line L is the vehicle body frame. The engine 500 is configured to support the engine E on the vehicle body frame 4BF in a state in which the frame 4BF faces an intermediate direction between the front-rear direction and the left-right direction. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  Here, the liquid-filled vibration isolator 500 according to the fifth embodiment is provided with respect to the liquid-filled vibration isolator 100 described in the first embodiment, as described above. The mounting angle is different, and the relative position of the upper member 1 with respect to the stopper member 8 (in the fifth embodiment, the upper member 1 is 45 degrees in the circumferential direction around the mounting bolt 4 as compared with the first embodiment). The other configurations of the liquid-filled vibration isolator 100 are the same, and the description thereof is omitted.

  As described above, in the liquid-filled vibration isolator 500, the pair of stopper fixing portions 21 are disposed at positions facing each other with the stopper restricting portion 22 interposed therebetween, and the pair of rib portions 22d sandwich the upper member 1. 24, the virtual straight line L is arranged at a position on the virtual straight line L while facing each other. Therefore, as shown in FIG. In the fifth embodiment directed in the middle of the direction (arrow LR direction in FIG. 24), the rigidity of the stopper member 8 is increased in both the front-rear direction and the left-right direction of the vehicle body frame 4BF. While ensuring efficiently, a stopper effect | action can be exhibited reliably, and the improvement of durability of the stopper member 8 can be aimed at.

  That is, the direction in which the stopper action is particularly required includes the vehicle front-rear direction (in the direction of arrow FB, for example, when a stopper action is required at the time of collision or vehicle connection), and the vehicle left-right direction (in the direction of arrow LR, For example, the vehicle body frame 4BF is used as in the present embodiment shown in FIGS. 22 to 24 even when both directions are required, such as when a stopper is required at the time of roll input or sudden start. By arranging the liquid-filled vibration isolator 500 in a state where the virtual straight line L faces in the middle direction between the front-rear direction and the left-right direction, it is possible to efficiently ensure the rigidity and strength of the stopper member 8 in both directions. it can.

  Further, in the present embodiment, the mounting surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and as shown in FIG. 24, the major axis direction of the elliptical shape is the inclination direction of the vehicle body frame 4BF. Therefore, the rigidity and strength can be efficiently secured to achieve both improvement in durability and weight reduction.

  That is, as in the case of the fourth embodiment described above, the liquid-filled vibration isolator 500 according to the present embodiment includes an engine E and a vehicle body frame that is inclined downward toward the engine E as shown in FIG. Since it is interposed between the bracket 4BL and the mounting surface 1f of the upper member 1, a load is always applied in a twisting direction from the bracket 4BL due to the inclination of the vehicle body frame 4BF. For this reason, the mounting surface 1f of the upper member 1 requires a relatively large rigidity and strength at portions where the load in the twisting direction acts (that is, both sides in the inclination direction of the vehicle body frame 4BF). There is a need to.

  Therefore, like the liquid-filled vibration isolator 500 in the present embodiment, the mounting surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and as shown in FIG. By matching with the inclination direction of the frame 4BF, the area of the portion where the rigidity strength is required can be increased, the damage of the mounting surface 1f can be suppressed, and the area of the portion where the rigidity strength is relatively not required. It is possible to reduce the weight of the upper member 1 by reducing the size. That is, it is possible to efficiently ensure the rigidity and strength of the upper member 1 and achieve both improvement in durability and weight reduction.

  Next, a sixth embodiment will be described with reference to FIGS. 25 to 27. FIG. 25 is a side view of the liquid filled type vibration damping device 600 according to the sixth embodiment, and shows a state in which the engine E is supported on the vehicle body frame 4BF. FIG. 26 is a top view of the liquid-filled vibration isolator 600, and FIG. 27 is a top view of the liquid-filled vibration isolator 600 viewed from the direction of arrow XXVII in FIG.

  In the first embodiment, the liquid-filled vibration isolator is installed in a state where the mounting surface of the body frame BF is parallel to the horizontal plane and the virtual straight line L faces the left-right direction (left-right direction in FIG. 1) of the body frame BF. The case where the engine 100 supports the engine E on the vehicle body frame BF has been described, but in the sixth embodiment, the mounting surface of the vehicle body frame 4BF is configured to be inclined downward toward the engine E, and the virtual straight line L is the vehicle body frame. The engine 600 is configured to support the engine E on the vehicle body frame 4BF with the frame 4BF facing in the front-rear direction. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  Here, the liquid-filled vibration isolator 600 of the sixth embodiment is inclined with respect to the body-frame frames BF and 4BF attached to the liquid-filled vibration isolator 100 described in the first embodiment ( (The mounting angle) is different, and the relative position of the upper member 1 with respect to the stopper member 8 (in the sixth embodiment, the upper member 1 is 90 degrees in the circumferential direction around the mounting bolt 4 as compared with the first embodiment). The other configurations of the liquid-filled vibration isolator 100 are the same, and the description thereof is omitted.

  As described above, in the liquid-filled vibration isolator 600, the pair of stopper fixing portions 21 are disposed at positions facing each other with the stopper regulating portion 22 interposed therebetween, and the pair of rib portions 22d sandwich the upper member 1. Therefore, as shown in FIG. 27, the virtual straight line L is directed in the front-rear direction of the vehicle body frame 4BF (in the direction of arrow FB in FIG. 27). In the sixth embodiment, the rigidity and strength of the stopper member 8 can be efficiently ensured with respect to the front-rear direction of the vehicle body frame 4BF, so that the stopper action can be reliably exerted, and the durability of the stopper member 8 can be ensured. Can be improved.

  That is, FIG. 25 to FIG. 25 show a case where a vehicle front-rear direction (in the direction of arrow FB, for example, when a stopper operation is required at the time of collision or vehicle connection) is required as a direction in which the stopper operation is particularly necessary. 27, the liquid-filled vibration isolator 500 is arranged with the virtual straight line L facing in the front-rear direction of the vehicle body frame 4BF, so that the rigidity of the stopper member 8 in both directions can be efficiently increased. Can be secured.

  Further, in the present embodiment, the attachment surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and the major axis direction of the elliptical shape is the inclination direction of the vehicle body frame 4BF as shown in FIG. Therefore, the rigidity and strength can be efficiently secured to achieve both improvement in durability and weight reduction.

  That is, the liquid-filled vibration isolator 600 according to the present embodiment is similar to the fourth and fifth embodiments described above, as shown in FIG. Since the vehicle body frame 4BF is interposed between the bracket 4BL and the mounting surface 1f of the upper member 1 due to the inclination of the vehicle body frame 4BF, a load is always applied from the bracket 4BL. Become. For this reason, the mounting surface 1f of the upper member 1 requires a relatively large rigidity and strength at portions where the load in the twisting direction acts (that is, both sides in the inclination direction of the vehicle body frame 4BF). There is a need to.

  Therefore, like the liquid-filled vibration isolator 600 in the present embodiment, the mounting surface 1f of the upper member 1 is configured to have an elliptical shape when viewed from above, and the major axis direction of the elliptical shape is shown in FIG. By matching with the inclination direction of the frame 4BF, the area of the portion where the rigidity strength is required can be increased, the damage of the mounting surface 1f can be suppressed, and the area of the portion where the rigidity strength is relatively not required. It is possible to reduce the weight of the upper member 1 by reducing the size. That is, it is possible to efficiently ensure the rigidity and strength of the upper member 1 and achieve both improvement in durability and weight reduction.

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

  For example, the numerical values (for example, the number, size, angle, etc. of each component) given in the above embodiments are merely examples, and other numerical values can naturally be adopted.

  In each of the above embodiments, the case where the upper member 1 is fastened to the engine E and the stopper member 8 is fastened to the vehicle body frame BF has been described. However, the present invention is not necessarily limited to this, and the upper member 1 is attached to the vehicle body frame BF. The stopper member 8 may be fastened to the engine E. In this case, the same effect as the case where the upper member 1 is fastened to the engine E and the stopper member 8 is fastened to the vehicle body frame BF can be obtained. Therefore, the degree of freedom of layout of the liquid filled type vibration isolator 100 can be improved.

  In each of the above-described embodiments, the case where the liquid-filled vibration isolator 100 is fastened to the vehicle body frame BF via the mounting bolt 5 that is fixed to the stopper fixing portion 21 is described. However, the present invention is not necessarily limited thereto. Alternatively, a through hole may be formed in the stopper fixing portion 21, and a bolt may be inserted into the through hole to fasten the liquid-filled vibration isolator 100 to the vehicle body frame BF. In this case, it is possible to achieve the same effect as when the liquid-filled vibration isolator 100 is fastened to the vehicle body frame BF via the mounting bolt 5 that is fixed to the stopper fixing portion 21. Therefore, the degree of freedom of layout of the liquid filled type vibration isolator 100 can be improved.

  In each of the above-described embodiments, the case where the restricting portion 22a is configured to have an annular flat plate shape with an inner diameter D2 when viewed from the top (viewed in the vertical direction in FIG. 8) is not necessarily limited thereto. The inner diameter D2 of the upper member upper surface 1f in the major axis direction may be smaller than the inner diameter D2 of the upper member upper surface 1f in the minor axis direction. In this case, since it becomes an elliptical shape corresponding to the shape of the upper surface 1f of the upper member 1, the gap between the hole of the restricting portion 22a and the outer peripheral surface of the upper member 1 is constant over the entire circumference of the hole of the restricting portion 22a. It can be.

  Therefore, even if the engine E and the body frame BF are displaced in any direction in the circumferential direction of the restricting portion 22a, a uniform gap can be maintained in any direction in the circumferential direction of the restricting portion 22a as long as the displacement amount is constant. it can. Therefore, the liquid-filled vibration isolator 100 can absorb the relative displacement between the engine E and the vehicle body frame BF uniformly in any circumferential direction of the restricting portion 22a.

  In each of the above embodiments, the line 45b1 connecting the end portions of the end bent pieces 45b is formed in an arc shape having a radius R5 (see FIG. 14A) protruding in the protruding direction of the end bent pieces 45b. However, the present invention is not necessarily limited to this, and it is configured by a straight line such that the tip of the end bent piece 45b is lowered toward the end in the extending direction of the bent piece 45. May be. In this case, the end bent piece 45b is gradually bent from the center bent piece 45a side, and the coupled portion of the end bent piece 45b and the fixed portion overhang 44a is crushed (the arc shape is not maintained). ) And the amount of deformation of the coupled portion can be reduced. Therefore, the durability of the bent piece 45 can be improved while preventing the strength from being lowered due to deformation.

  In the first embodiment (fourth embodiment), the second embodiment (fifth embodiment) and the third embodiment (sixth embodiment), the virtual straight line L is the left-right direction of the vehicle body frame BF (left-right direction in FIG. 1). The case where the liquid-filled vibration isolator 100 supports the engine E on the vehicle body frame BF in the intermediate direction between the front-rear direction and the left-right direction and in the front-rear direction has been described. The liquid-filled vibration isolator 100 may support the engine E on the vehicle body frame BF with the virtual straight line L oriented at an arbitrary angle with respect to the vehicle body frame BF.

  In this case, the virtual straight line L is directed to maintain a balance between the direction of the virtual straight line L for improving the strength and the direction of the virtual straight line L due to the layout restriction of the liquid-filled vibration isolator 100 on the body frame BF. Therefore, the strength required for the liquid-filled vibration isolator 100 and the arrangement on the vehicle body frame BF can be achieved.

  In the fourth embodiment, the fifth embodiment, and the sixth embodiment, the major axis direction of the upper member upper surface 1f of the upper member 1 is along the inclination angle of the vehicle body frame 4BF, and is equal to both sides of the mounting bolt 4. Although the case where the upper member upper surface 1f is formed in the length has been described, the present invention is not necessarily limited to this. At least the upper member upper surface 1f on the lower side of the mounting bolt 4 (lower side of the vehicle body frame BF) is attached to the mounting bolt 4. It may extend longer than the upper member upper surface 1f on the upper side (the upper side of the body frame BF).

  In this case, the upper member upper surface 1f on the lower side of the mounting bolt 4 (lower side of the vehicle body frame BF) extends longer than the upper surface of the upper member 1f on the upper side of the mounting bolt 4 (upper side of the vehicle body frame BF). It can be ensured efficiently, and both improvement in durability and weight reduction can be achieved.

  That is, the liquid-filled vibration isolator 100, 500, 600 in the fourth embodiment, the fifth embodiment, and the sixth embodiment includes the engine E and the vehicle body frame 4BF inclined downward toward the engine E. Due to the interposition, a load in the twisting direction from the bracket 4BL is always applied to the mounting surface 1f of the upper member 1 due to the inclination of the vehicle body frame 4BF.

  For this reason, the mounting surface 1f of the upper member 1 requires a relatively large rigidity and strength at portions where the load in the twisting direction acts (that is, both sides in the inclination direction of the vehicle body frame 4BF). Further, since the load due to the weight of the engine E is added to the surface of the upper member upper surface 1f below the mounting bolt 4, the upper side below the mounting bolt 4 (below the vehicle body frame BF). The member upper surface 1f is subjected to a larger load than the upper member upper surface 1f on the upper side of the mounting bolt 4 (upper side of the vehicle body frame BF).

  Accordingly, the upper member upper surface 1f on the lower side of the mounting bolt 4 (lower side of the vehicle body frame BF) is extended longer than the upper surface of the upper member 1f on the upper side of the mounting bolt 4 (upper side of the vehicle body frame BF). It is possible to improve the durability of the upper member 1 by dispersing the load applied to the upper surface 1f of the upper member (the lower side of the body frame BF).

1 is a side view of an engine supported by a liquid filled type vibration damping device attached to a vehicle body frame in a first embodiment of the present invention. It is a top view of a liquid enclosure type vibration isolator. 2 is a side view of the liquid-filled vibration isolator as viewed in the direction of arrow III. FIG. 2 is a side view of the liquid-filled vibration isolator as viewed in the direction of arrow IV. FIG. 5 is a cross-sectional view of the liquid filled type vibration isolator taken along line VV in FIG. 2. FIG. 3 is a cross-sectional view of the liquid filled type vibration isolator taken along line VI-VI in FIG. 2. (A) is a top view of the first mounting bracket, (b) is a cross-sectional view of the first mounting bracket along line VIIb-VIIb in FIG. 7 (a), and (c) is FIG. It is sectional drawing of the 1st attachment bracket in the VIIc-VIIc line | wire of (). It is a top view of a stabilizer metal fitting. It is sectional drawing of the stabilizer metal fitting in the IX-IX line of FIG. (A) is a top view of a flange-shaped metal fitting, (b) is sectional drawing of the flange-shaped metal fitting in the Xb-Xb line | wire of Fig.10 (a). It is a top view of a lower member. (A) is sectional drawing of the lower member in the XIIa-XIIa line of FIG. 11, (b) is sectional drawing of the lower member in the XIIb-XIIb line of FIG. 11, (c) is lower part. It is sectional drawing in the XIIb-XIIb line | wire of FIG. 11 in the state by which the flexible rubber part and the covering rubber part were arrange | positioned inside the side member 7. FIG. FIG. 3 is a top view of the liquid-filled vibration isolator as viewed from the direction of arrow XIII in FIG. 1. (A) is the partial expanded side view of the bending piece which expanded the part shown by XIV of FIG. 13, (b) is a side view of the bending piece in the arrow XVIb direction view of FIG. 14 (a). is there. 14 (c) is a partially enlarged side view of the bent piece in the middle of deformation from the state shown in FIG. 14 (a), and FIG. 14 (d) is a view of the bent piece as viewed in the direction of the arrow XVId in FIG. 14 (c). It is a side view. (E) is a partially enlarged side view of the bent piece that has been deformed from the state shown in FIG. 14 (c), and (f) is a bent piece as viewed in the direction of arrow XVIf in FIG. 14 (e). FIG. It is a side view of the liquid filling type vibration isolator in 2nd Embodiment. FIG. 16 is a top view of the liquid-filled vibration isolator as viewed from the direction of the arrow XVI in FIG. 15. It is a side view of the liquid filling type vibration isolator in 3rd Embodiment. FIG. 18 is a top view of the liquid-filled vibration isolator as viewed from the direction of arrow XVIII in FIG. 17. It is a side view of the liquid filling type vibration isolator in 4th Embodiment. It is a top view of a liquid enclosure type vibration isolator. FIG. 21 is a top view of the liquid-filled vibration isolator as viewed from the direction of the arrow XXI in FIG. 20. It is a side view of the liquid filling type vibration isolator in 5th Embodiment. It is a top view of the liquid filling type vibration isolator in 5th Embodiment. FIG. 23 is a top view of the liquid-filled vibration isolator as viewed from the direction of arrow XXIV in FIG. 22. It is a side view of the liquid filling type vibration isolator in 6th Embodiment. It is a top view of the liquid filling type vibration isolator in 6th Embodiment. FIG. 26 is a top view of the liquid-filled vibration isolator as viewed from the direction of arrow XXVI in FIG. 25.

Explanation of symbols

100, 500, 600 Liquid-sealed vibration isolator 1 Upper member 1a Fastening hole (part of upper member)
1b Positioning convex part (a part of the upper member)
1c Overhang site (part of upper member)
1d Protrusion (a part of the upper member)
1e Outer edge bottom surface (a part of the upper member)
1f Upper member upper surface (part of upper member)
2 Diaphragm member 3 Anti-vibration base 3a Covering part (part of the anti-vibration base)
3c Partition receiving step (part of vibration isolator base)
6 Intermediate member 7 Lower member 8 Stopper member 9 Flexible rubber portion 10 Covered rubber portion 10a Covered end portion (part of the covered rubber portion)
10b Covered bottom (part of the cover rubber)
10c Covering cylinder part (part of the covering rubber part)
10d Covering inclined part (part of the covering rubber part)
12 Liquid enclosure 12A Main liquid compartment (part of liquid enclosure)
12B Secondary liquid chamber (part of liquid enclosure)
13 Orifice passage (orifice)
14 Partition (partitioning means)
15 Elastic partition membrane (part of partitioning means)
16 Orifice bracket (part of partitioning means)
17 Partition member (part of partition means)
20 Stopper overhanging portion 21 Stopper fixing portion 22 Stopper restricting portion 22a Restricting portion (part of the stopper restricting portion)
22b Wall part (part of stopper regulating part)
22c Inclined cylinder part (part of stopper restricting part)
22d rib portion 22d1 tip arc portion (part of bent piece)
22d2 Bottom arc part (part of bent piece)
30 Intermediate member cylinder (part of intermediate member, part of intermediate connecting part)
31 Intermediate member inclined part (part of intermediate member, part of intermediate connecting part)
32 Intermediate member fixing part (part of intermediate member, intermediate overhang part)
40 Lower member lower tube (part of lower member)
41 Bottom of bottom member (bottom)
42 Lower member upper tube (part of tube)
43 Lower member inclined part (part of cylinder part)
44 Lower member fixing part (lower projecting part)
44a Fixed part overhang (part of lower overhang part)
44a1 bottom surface (part of the lower overhang)
45 folded piece 45a center folded piece (part of folded piece, middle folded piece)
45a1 line (part of bent piece)
45b End bent piece (part of bent piece, end bent piece)
45b1 arc (part of bent piece)
S space L virtual straight line (part of virtual line)
T1, T2, T3 thickness

Claims (3)

A liquid sealing chamber is provided between the upper member, the intermediate member, the vibration isolating base that connects the upper member and the intermediate member and is formed of a rubber-like elastic body, and the vibration isolating base that is attached to the intermediate member. A diaphragm member to be formed; partitioning means for partitioning the liquid sealing chamber into a main liquid chamber on the vibration isolating base side and a sub liquid chamber on the diaphragm member side; an orifice for communicating the main liquid chamber and the sub liquid chamber with each other; In a liquid-filled vibration isolator equipped with
A stopper member attached to the intermediate member and exerting a stopper action with the upper member;
The intermediate member includes a connecting portion to which the vibration-proof base is connected, and an intermediate projecting portion that protrudes radially outward from the connecting portion in a flange shape,
The stopper member includes a stopper overhanging portion that is superimposed on the intermediate overhanging portion of the intermediate member from the upper member side, and a stopper restricting portion that is erected from an inner edge of the stopper overhanging portion and restricts the displacement of the upper member. A pair of stopper fixing portions that project radially outward from the outer edge of the stopper overhanging portion and sandwich the stopper restricting portion.
The diaphragm member includes a bottom portion in which an opening portion is formed, a cylindrical tube portion standing from an outer edge of the bottom portion, and a flange shape projecting radially outward from an upper end of the cylinder portion. A lower part having a lower projecting part that is stacked on the projecting part from the opposite side of the stopper projecting part and a pair of bent pieces that are erected from the outer edge of the lower projecting part and sandwiched between the cylindrical parts A side member, a flexible rubber portion that closes the opening of the bottom portion and is formed into a film shape from a rubber-like elastic body; A covering rubber part composed of a rubber-like elastic body,
An intermediate projecting portion of the intermediate member is sandwiched between a lower projecting portion of the lower member and a stopper projecting portion of the stopper member, and the bent piece of the lower member is used as a stopper of the stopper member. By folding back to the overhanging portion side, the lower member and the stopper member are attached to the intermediate member, and the partition means includes a covering rubber portion that covers the vibration-proof base and the bottom portion of the lower member. Sandwiched between
The upper member is connected to the vibration generator side, the stopper fixing portion of the stopper member is connected to the vehicle body frame side, and at least the diaphragm member is embedded in the vehicle body frame side. Type vibration isolator. The stopper member includes a rib portion formed by recessing the inner surface side facing the vibration-proof base and bulging the outer surface side,
The rib portion is formed continuously from the stopper restricting portion side to the stopper fixing portion side, and is formed from the stopper restricting portion side to a position exceeding at least the outer edge of the intermediate projecting portion of the intermediate member,
The space formed between the vibration-proof base and the stopper restricting portion is communicated with the outside through a space formed by a recess on the inner surface side of the rib portion. Liquid-filled vibration isolator. The bent piece includes a central bent piece and a pair of end bent pieces connected to both sides of the central bent piece,
The end bent piece is configured in a front view arc shape having a radius larger than at least the plate thickness in the standing direction and convex to the leading end in the standing direction, and the lower side as the distance from the central bent piece increases. The liquid-filled vibration isolator according to claim 1 or 2, wherein a standing height from the projecting portion is low.

Images