JP2009210077A - Liquid-sealed vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid-sealed vibration control device capable of increasing the ratio of a spring constant in the lateral direction and the vertical direction, and capable of reducing the ratio of a dynamic spring constant and a static spring constant. <P>SOLUTION: Since an inside ring 509a of a bottom metal fitting 509 is constituted to be connected to a first fixture 501, for example, when a vibration control base body 3 tries to compress liquid in a liquid-sealed chamber 510 when the first fixture 501 is displaced in the direction for approaching a second fixture 502, the inside ring 509a of the bottom metal fitting 509 and a rubber film 509c are displaced by interlocking in the same phase direction as the vibration control base body 3, and an increase in liquid pressure in the liquid-sealed chamber 510 can be relieved thereby. Thus, an increase in the spring constant in the vertical direction by influence of the liquid pressure is restrained, and the ratio of the spring constant in the lateral direction and the vertical direction can be increased by that extent. Since the liquid pressure can be effectively released, the ratio of the dynamic spring constant and the static spring constant can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid-filled vibration isolator, and in particular, a liquid-filled liquid that can increase the ratio of the spring constant in the left-right direction and the up-down direction and reduce the ratio of the dynamic spring constant to the static spring constant. The present invention relates to a type vibration isolator.

  A liquid-filled vibration isolator is known as an anti-vibration device that prevents engine vibration and the like from being transmitted to the cab while supporting and fixing the cab of the truck to the vehicle body frame (Patent Documents 1 to 3). Some liquid-filled vibration isolator is provided with a stirring member. This type of liquid-filled vibration isolator is shown as an example in FIG.

  As shown in FIG. 25, the liquid-filled vibration isolator 800 has a first anti-vibration device 801 attached to the cab side and a second anti-vibration device 802 attached to the vehicle body frame side made of a rubber-like elastic body. A liquid sealing chamber 810 is formed between a sealing member 809 connected to the vibration base 803 and attached to the second fixture 802 and the vibration isolation base 803.

The liquid sealing chamber 810 is filled with a high-viscosity liquid such as silicon oil, and a disc-shaped stirring member 805 configured as a part of the first fixture 801 is disposed. According to the liquid-filled vibration isolator 800, when vibration is input, the vibration damping function and the vibration insulation function are achieved by the liquid flow effect due to the reciprocating displacement of the stirring member 805 in the liquid fill chamber 810 and the vibration damping effect of the vibration-proof substrate. Can be fulfilled.
JP 2002-155984 A JP 2002-145115 A Japanese Utility Model Publication No. 05-052396

  By the way, in the vibration isolator that supports and fixes the cab in this way, the horizontal direction (for example, the left and right direction in FIG. 25) is intended to suppress the transmission of vibration to the cab while preventing the cab from rolling. The spring constant is increased and the spring constant in the vertical direction (for example, the vertical direction in FIG. 25) is decreased (that is, the ratio of the spring constant between the horizontal direction and the vertical direction is increased).

  In this case, normally, a plate-shaped intermediate plate extending in the vertical direction is embedded in the vibration-proof base, and the pressure receiving area in the horizontal direction is made sufficiently larger than that in the vertical direction, so that the spring constant in the horizontal direction is set. Increasing the ratio of the spring constant in the left-right direction and the up-down direction is performed.

  However, in the above-described conventional liquid-filled vibration isolator 800, the liquid-filled chamber 810 is sealed by the sealing member 809, and there is no fluid escape space. In this case, since the volume change of the liquid sealing chamber 810 is small with respect to the displacement in the horizontal direction, the increase in the hydraulic pressure is relatively small, whereas the increase in the hydraulic pressure is significant with respect to the displacement in the vertical direction. This increases the spring constant.

  Therefore, even if the spring constant in the left-right direction increases due to the embedded intermediate plate, the spring constant in the vertical direction also increases at the same time due to the influence of the hydraulic pressure, so the ratio of the spring constant in the left-right direction and the vertical direction can be increased. There was a problem that it was not possible. Moreover, since there is no escape point for the hydraulic pressure as described above, there is a problem that the ratio (static ratio) between the dynamic spring constant and the static spring constant increases.

  The present invention has been made to solve the above-described problems, and increases the ratio of the spring constant in the horizontal direction and the vertical direction and decreases the ratio of the dynamic spring constant and the static spring constant. An object of the present invention is to provide a liquid-filled vibration isolator that can perform the above.

  In order to achieve this object, the liquid-filled vibration isolator according to claim 1 connects the first fixture, the cylindrical second fixture, the second fixture, and the first fixture. And an anti-vibration base composed of a rubber-like elastic body, a diaphragm which is attached to the second fixture and forms a liquid enclosure between the anti-vibration base and the liquid enclosure. A stirring member connected to the first fixture, and the diaphragm includes an annular outer member attached to the second fixture and a circular inner side located on the inner peripheral side of the outer member. A member, and a film-like member configured to form a film from a rubber-like elastic body and connect the outer peripheral side of the inner member and the inner peripheral side of the outer member, and the inner member is connected to the first fixture And the first fixture changes according to the vibration input. Then, the inner member in the first fitting and the same phase are configured to be displaced.

  The liquid-filled vibration isolator according to claim 2 is the liquid-filled vibration isolator according to claim 1, wherein the second fixture is attached to a vibration generating body side or a vehicle body side, and to the attachment member A cylindrical member to which the sealing member is attached, and the attachment member and the cylindrical member are connected by folding back one end of the attachment member or the cylindrical member to the other end. The connecting part, which is performed by sandwiching the part, and is connected to the mounting member and the cylindrical member is located on the liquid sealing chamber side, and the inner diameter of the connecting part is smaller than the outer diameter of the stirring member It is comprised so that a stopper effect | action can be acquired when the said stirring member contact | abuts to the said connection part, The said attachment member or a cylindrical member is a mating surface of said one edge part and the other edge part A compound that is recessed in at least one of the surfaces. Includes a groove, said groove is formed at a position communicating with the outside while interspersed in said one surface.

  The liquid-filled vibration isolator according to claim 3 is the liquid-filled vibration isolator according to claim 2, wherein the other end extends toward the liquid-filled chamber, and the one end Is extended toward the liquid sealing chamber and is in contact with the other end, connected to the contact, and connected to the connection. A pinching portion that comes into contact with the other end portion from the side opposite to the contact portion when sandwiched from the connection portion and sandwiches the other end portion with the contact portion; The mating surfaces of the end portion and the clamping portion are both flat surfaces, and the groove is recessed in at least one of the mating surfaces of the other end portion and the abutting portion. And the groove extends radially outwardly from the liquid sealing chamber side and extends to the other end. It is formed at a position to communicate with the outside of the space between the connecting portion and.

The liquid-filled vibration isolator according to claim 4 is the liquid-filled vibration isolator according to claim 3, wherein the other end is configured by an end of the mounting member, and the one end is The connection between the attachment member and the tubular member is performed by folding back the end of the tubular member and sandwiching the end of the attachment member. , Composed of a material having a plate thickness thinner than that of the mounting member,
The stirring member is located closer to the sealing member than the connecting portion, and the stirring member is in contact with the contact portion.

  According to the liquid-filled vibration isolator according to claim 1, the diaphragm forming the liquid-filled chamber between the vibration-proof base and the annular outer member attached to the second fixture, and the inner periphery of the outer member Since it is a configuration comprising a circular inner member positioned on the side, and a film-like member configured to form a film from a rubber-like elastic body while connecting the outer peripheral side of the inner member and the inner peripheral side of the outer member. When vibrations in the vertical direction are input, the membrane member of the diaphragm is elastically deformed, so that the liquid pressure can be absorbed and an increase in the liquid pressure in the liquid sealing chamber can be suppressed.

  As a result, it is possible to suppress an increase in the spring constant in the vertical direction due to the influence of the hydraulic pressure, so that the ratio of the spring constant in the horizontal direction and the vertical direction can be increased accordingly. In addition, since the dynamic spring constant can be reduced by absorbing the hydraulic pressure by elastic deformation of the diaphragm (membrane member) as described above, the dynamic spring constant and the static spring constant can be reduced accordingly. There is an effect that the ratio can be reduced.

  Further, according to the present invention, when the inner member of the diaphragm is connected to the first fixture, and the first fixture is displaced in accordance with the vibration input, the inner member of the diaphragm is displaced in the same phase as the first fixture. As a result, the increase in the hydraulic pressure in the liquid enclosure is more reliably suppressed, the ratio of the spring constant in the left-right direction and the spring constant in the vertical direction is increased, and the dynamic spring constant and the static spring constant are increased. The ratio can be reduced.

  That is, when the vibration is input in the vertical direction, the first fixture is displaced in the direction approaching the second fixture (the direction in which the anti-vibration base is close to the diaphragm, downward), and the anti-vibration base is liquid in the liquid enclosure chamber. When the diaphragm is to be compressed, the diaphragm (inner member and membrane member) is displaced in the same phase direction (downward) as the anti-vibration substrate, so that the positive pressure side of the fluid pressure in the fluid filled chamber The increase to can be mitigated.

  Similarly, when the vibration input in the vertical direction is input, the first fixture is displaced in a direction away from the second fixture (a direction in which the vibration isolator is separated from the diaphragm, upward), and the vibration isolator is moved in the liquid enclosure. When the liquid is to be expanded, the diaphragm (inner member and film-like member) is displaced in conjunction with the anti-vibration base in the same phase direction (upward), so that the negative pressure of the liquid in the liquid enclosure is reduced. The increase to the compression side can be mitigated.

  As described above, according to the present invention, not only the hydraulic pressure is absorbed by the elastic deformation of the diaphragm (membrane member) itself, but also the diaphragm (inner member and membrane member) follows the displacement of the vibration-proof substrate (anti-proof). By displacing in the same phase direction as the vibration base, the hydraulic pressure can be released more effectively.

  As a result, the increase in the spring constant in the vertical direction due to the influence of the hydraulic pressure can be more effectively suppressed, so that the ratio of the spring constant in the horizontal direction and the vertical direction can be increased accordingly. There is an effect. Further, in addition to elastic deformation of the diaphragm (membrane member) itself, the displacement of the diaphragm (inner member and membrane member) allows the hydraulic pressure to escape more effectively, thereby reducing the dynamic spring constant. As a result, the ratio of the dynamic spring constant and the static spring constant can be further reduced.

  According to the liquid-filled vibration isolator according to claim 2, in addition to the effect exhibited by the liquid-filled vibration isolator according to claim 1, the second fixture comprises two members (an attachment member and a cylindrical member). Since the two members (the attachment member and the cylindrical member) are connected by folding one end and sandwiching the other end (caulking), the two members are connected by welding. As compared with the product, there is an effect that the manufacturing cost of the second fixture can be reduced. As a result, the product cost of the liquid-filled vibration isolator as a whole can be reduced.

  Moreover, according to this invention, as above-mentioned, it is the structure which connects two members (an attachment member and a cylindrical member) by caulking, and since it does not receive to the influence of the heat at the time of welding, it was manufactured from two members There is an effect that the dimensional accuracy of the second fixture can be improved. As a result, it is possible to reduce the dimensional management cost at the time of manufacturing the second fixture, and it is possible to suppress the variation in spring characteristics and the decrease in durability caused by the dimensional variation of the second fixture.

  According to the present invention, the connecting portion where the two members (the attachment member and the cylindrical member) are connected is positioned on the liquid sealing chamber side, and the inner diameter of the connecting portion is smaller than the outer diameter of the stirring member. Therefore, the agitating member is brought into contact with the connecting portion to obtain a stopper action, that is, the caulking portion (folded portion) has a stopper function in addition to the connection of the two members. It can be made unnecessary. As a result, there is an effect that the manufacturing cost can be reduced and the size and weight can be reduced as the entire liquid-filled vibration isolator.

  Here, according to the present invention, a plurality of grooves are provided in at least one surface of the mating surfaces of one end and the other end, and the grooves are scattered on one surface. However, since the structure is formed at a position communicating with the outside, even if the press oil remains in the caulking portion (folded portion), the press oil can be discharged to the outside through the groove. effective. As a result, it is possible to suppress the press oil remaining in the caulking portion from flowing out onto the adhesive during vulcanization and causing poor adhesion between the second fixture and the vibration-proof base.

  Also, if the press oil remaining in the caulking portion can be discharged to the outside during vulcanization in this way, surface treatment by shot blasting is performed in advance after the press working and before the caulking step, and the caulking portion (folding portion) There is no need to keep the press oil inside, so it is possible to avoid an unnecessary increase in the number of surface treatments by shot blasting and to reduce the manufacturing cost accordingly. is there.

  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 2, one end portion is composed of a contact portion, a connection portion, and a clamping portion, With the other end abutted against the abutting portion of one end, the clamping portion is folded back from the connecting portion of the one end, and the other between the abutting portion of the one end and the clamping portion By sandwiching the end portion of this, the attachment member and the cylindrical member can be connected by caulking.

  Here, according to the present invention, a groove is provided in at least one of the mating surfaces of the other end and the contact portion, and the groove is provided between the other end and the connecting portion. Since the structure is formed at a position where the space communicates with the outside, not only the press oil remaining between the mating surfaces of the other, the end and the abutting part, but also between the other end and the connecting part The press oil remaining in the space can also be reliably discharged to the outside through the groove. Therefore, it is possible to suppress the occurrence of poor adhesion due to the press oil that has flowed out onto the adhesive.

  Further, according to the present invention, since the groove is configured to extend radially outward from the liquid sealing chamber side toward the radially outer side, the space between the other end and the connection portion is externally provided. Can be connected to each other at the shortest distance, and the flow resistance can be reduced by the linear flow path, and the discharge efficiency of the press oil to the outside can be improved accordingly. Therefore, it is possible to suppress the occurrence of poor adhesion due to the press oil that has flowed out onto the adhesive.

  Furthermore, according to the present invention, since any of the mating surfaces of the other end and the clamping portion is a flat surface, these mating surfaces can be brought into close contact with each other, and as a result, press oil It is possible to block the path when the liquid flows out to the cavity side. This makes it difficult for the press oil remaining in the space formed between the other end and the connecting portion to flow out to the cavity side, and is accordingly discharged to the outside through the groove. There is an effect that it can be made easy. Therefore, it is possible to suppress the occurrence of poor adhesion due to the press oil that has flowed out onto the adhesive.

  Thus, according to the present invention, with the above-described configuration, the press oil remaining in the caulking portion (folded portion) is discharged to the outside, and the effect of suppressing adhesion failure and the press oil remaining in the caulking portion are reduced. It is possible to synergistically achieve both the effect of suppressing inflow (flowing out) into the cavity and suppressing adhesion failure.

  According to the liquid-filled vibration isolator according to claim 4, in addition to the effect exhibited by the liquid-filled vibration isolator according to claim 3, the cylindrical member is made of a material having a plate thickness thinner than that of the mounting member, The connection between the member and the cylindrical member is a configuration in which the end portion of the cylindrical member is folded and the end portion of the mounting member is sandwiched, that is, the caulking process is performed on the thin plate member. There are effects that the processing cost can be reduced and the processing accuracy can be improved.

  In this case, since the stirring member is positioned closer to the closing member than the connecting portion, and this stirring member is configured to come into contact with the contact portion, there is an effect that durability can be improved. . That is, in the configuration in which the stirring member is in contact with the holding portion, the tip of the holding portion is a free end. Therefore, when the stirring member is in contact, the tip of the holding portion is crushed and the stirring member is separated. As a result, the front end of the clamping portion is lifted by the reaction, and the caulking portion (folded portion) is loosened.

  On the other hand, when the stirring member is configured to contact the contact portion as in the present invention, the contact portion is connected to the cylindrical portion (tubular portion) of the cylindrical member. Therefore, even if the stirring member is repeatedly contacted, loosening of the caulking portion (folded portion) can be suppressed. As a result, it is possible to maintain the connected state of the connecting portion and improve durability.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a liquid-filled vibration isolator 100 according to the first embodiment of the present invention.

  In addition, while the arrow X shown in FIG. 1 shows the horizontal direction of the liquid filled type vibration isolator 500, the arrow Y shows the vertical direction of the liquid filled type vibration isolator 500, and these arrow X and arrow Y are These correspond to the left-right direction and the up-down direction of the automobile (vehicle), respectively. In order to facilitate understanding, the nut N and the male screw 6a shown in FIG.

  This liquid-filled vibration isolator 100 is a vibration isolator for reducing engine vibration transmitted to a cab while supporting and fixing a cab of an automobile (truck) to a vehicle body frame, as shown in FIG. A first mounting bracket 1 mounted on the cab side, a cylindrical second mounting bracket 2 mounted on the vehicle body frame side below the cab, and a vibration isolating base 3 configured by connecting these components and made of a rubber-like elastic body , And a bottom fitting 9 attached to the second attachment fitting 2.

  The first mounting bracket 1 includes an upper stopper bracket 4 that restricts displacement in the bound direction, which is a direction in which the first mounting bracket 1 is close to the second mounting bracket 2, and the first mounting bracket 1 is separated from the second mounting bracket 2. The lower stopper metal fitting 5 which restricts the displacement in the rebound direction, which is the direction to be connected, and the connecting member 6 for connecting these and projecting the mounting bolt B on the cab side are mainly provided.

  As shown in FIG. 1, the second mounting bracket 2 includes a mounting bracket 7 on which the vibration-proof base 3 is vulcanized and mounted on the vehicle body frame side, and an upper side (upper side in FIG. 1) attached to the mounting bracket 7. In addition, a vibration-proof base 3 is provided with a cylindrical fitting 8 on which vulcanization molding is performed.

  A bottom fitting 9 is attached below the cylindrical fitting 8 (downward in FIG. 1), and a liquid sealing chamber 10 is formed between the bottom fitting 9 and the vibration isolating base 3. Note that silicon oil is sealed in the liquid sealing chamber 10.

  The liquid-filled vibration isolator 100 configured as described above absorbs the displacement of the first mounting bracket 1 relative to the second mounting bracket 2 by elastic deformation of the vibration isolation base 3. When the first mounting bracket 1 is displaced with respect to the second mounting bracket 2, the lower stopper bracket 5 is displaced within the liquid sealing chamber 10. As a result, the silicon oil sealed in the liquid sealing chamber 10 becomes a resistance, and the liquid-sealed vibration isolator 100 generates a damping force. As a result, vibration from the engine or the like can be prevented from being transmitted to the cab side.

  2 is a view showing the upper stopper fitting 4 and the connecting member 6, FIG. 2 (a) is a top view of the upper stopper fitting 4, and FIG. 2 (b) is a view taken along IIb- in FIG. 2 (a). It is sectional drawing of the upper stopper metal fitting 4 and the connection member 6 in the IIb line.

  The upper stopper fitting 4 is press-molded from a flat plate made of steel material to a plate thickness T1, and as shown in FIGS. 2 (a) and 2 (b), an upper stopper base 4a and a pair of An upper stopper connecting portion 4b and a pair of upper stopper contact portions 4c are provided.

  The upper stopper base 4a is formed in a rectangular flat plate shape as viewed from above (viewed in the vertical direction in FIG. 2 (a)), and has a bolt B projecting from the center thereof. The pair of upper stopper connection portions 4b extend downward (downward in FIG. 2 (b)) from both side ends (FIG. 2 (b) in the left-right direction both ends) of the upper stopper base 4a.

  The pair of upper stopper contact portions 4c are in contact with the second mounting bracket 2 (see FIG. 1) and bound in the direction in which the first mounting bracket 1 (see FIG. 1) approaches the second mounting bracket 2 (see FIG. 2 (b) is a part that regulates the downward displacement), and as shown in FIGS. 2 (a) and 2 (b), the lower ends of the pair of upper stopper connecting portions 4b (lower ends of FIG. 2 (b)) The upper stopper notch portion 4c-1 that extends in the outer direction (left and right direction in FIG. 2 (b)) and is cut out in an arc shape when viewed from the top (viewed in the vertical direction in FIG. 2 (a)). I have.

  Using the space cut out by the upper stopper cutout portion 4c-1, the second mounting bracket 2 (see FIG. 1) is placed in the mounting hole 7c-1 (see FIG. 4) of the mounting bracket 7 to be described later. Bolts (not shown) for fixing to are inserted.

  Further, since the upper stopper contact portion 4c is in contact with the second mounting bracket 2 (see FIG. 1), the force acting on the upper stopper contact portion 4c is dispersed as the contact area increases. The durability of the upper stopper fitting 4 can be improved.

  Therefore, when the pair of upper stopper contact portions 4c are extended outward (outward in the left-right direction in FIG. 2 (a)) with respect to the axis O, the mounting flange of the second mounting bracket 2 to be described later is provided in that direction. The portion 7c is extended, and the area where the upper stopper contact portion 4c and the mounting flange portion 7c overlap in the direction of the axis O direction (viewed in the direction perpendicular to the plane of FIG. 2A) increases. Therefore, it is possible to secure an area where the upper stopper contact portion 4 c is in contact with the second mounting bracket 2.

  However, in a direction connecting a pair of mounting holes 7c-1 (see FIG. 4), which will be described later (the left-right direction in FIG. 4 and the left-right direction in FIG. 2A), a bolt (not shown) inserted through the mounting hole 7c-1. When the upper stopper contact portion 4c extends in that direction, the upper stopper contact portion 4c is disposed in the opening direction of the mounting hole 7c-1 (perpendicular to FIG. 2). . Therefore, it is difficult to insert a bolt into the mounting hole 7c-1 (see FIG. 4), and it is difficult to mount the liquid-filled vibration isolator 100 on the vehicle body frame side.

  Here, in the first embodiment, since the upper stopper contact portion 4c includes the upper stopper notch portion 4c-1, it affects the insertion of a bolt (not shown) into the mounting hole 7c-1 described later. There is nothing to do. Therefore, it is possible to extend the portions on both sides (upper and lower sides in FIG. 2A) of the upper stopper notch 4c-1 from the axis O toward the outside (outward in the left and right direction in FIG. 2). Therefore, it is possible to secure a wide area of the upper stopper abutting portion 4c to improve the durability of the upper stopper fitting 4 and to secure the assembly property of the liquid-filled vibration isolator 100 to the vehicle body frame side.

  Further, as shown in FIG. 2B, the connecting member 6 is formed of a steel material in a substantially cylindrical shape having an outer diameter D1, and is downward (downward in FIG. 2B) from the rectangular center of the upper stopper base 4a. A male screw 6a having an outer diameter D2 is provided so as to protrude from the lower surface 6b of the connecting member 6.

  The lower stopper fitting 5 (see FIG. 1) is inserted into the male screw 6a, and the nut N (see FIG. 1) is screwed into the male screw 6a, whereby the lower stopper fitting 5 is held between the lower surface 6b and the nut N. The lower stopper fitting 5 is fastened to the connecting member 6.

  3 is a view showing the lower stopper fitting 5, FIG. 3 (a) is a top view of the lower stopper fitting 5, and FIG. 3 (b) is a lower view taken along the line IIIb-IIIb in FIG. 3 (a). It is sectional drawing of the stopper metal fitting 5. FIG.

  The lower stopper metal fitting 5 is a member that generates a damping force by moving inside a liquid sealing chamber 10 (see FIG. 1), which will be described later. As shown in FIGS. 3 (a) and 3 (b), It is press-molded from a flat plate made of steel material to a plate thickness dimension T2, and includes a lower stopper base 5a, a lower stopper connecting portion 5b, and a lower stopper abutting portion 5c.

  As shown in FIG. 3 (a), the lower stopper base 5a is formed in a circular shape when viewed from above (FIG. 3 (a) as viewed in the direction perpendicular to the paper surface), and a screw 6a (see FIG. 2 (b)) is inserted through the center thereof. A through hole having an inner diameter D3 is provided. As shown in FIG. 3 (b), the lower stopper connecting portion 5b is formed in a cylindrical shape that is erected from the outer edge of the lower stopper base 5a toward the lower outer side (lower outer side in FIG. 3 (b)). Yes.

  The lower stopper abutting portion 5c exerts a stopper action by abutting against a cylindrical abutting portion 8b (see FIG. 1) of a cylindrical fitting 8 described later via a vibration isolating base 3 (see FIG. 1). 3B, as shown in FIG. 3B, radially outward from the lower end of the lower stopper connecting portion 5b (lower end of FIG. 3B) around the axis O (FIG. 3B outer side in the left-right direction). It is extended toward. Further, the outer shape of the lower stopper abutting portion 5c is formed in a ring shape having an outer diameter D4 when viewed from above (FIG. 3A, viewed from the direction perpendicular to the paper surface).

  FIG. 4 is a top view of the mounting bracket 7. 5 is a cross-sectional view of the mounting bracket 7, FIG. 5 (a) is a cross-sectional view of the mounting bracket 7 along the line Va-Va in FIG. 4, and FIG. 5 (b) is a cross-sectional view of FIG. It is sectional drawing of the attachment metal fitting 7 in the Vb-Vb line | wire.

  As shown in FIGS. 5 (a) and 5 (b), the mounting bracket 7 is press-molded from a flat plate made of a steel material to a thickness T3, and includes a mounting caulking portion 7a and a mounting connecting portion. 7b and a mounting flange portion 7c.

  As shown in FIG. 4, the attachment caulking portion 7a is formed in a ring shape having an inner diameter D5 when viewed from the top (viewed in the direction perpendicular to the plane of FIG. 4). The lower surface 7a-1 as the lower surface and the upper surface 7a-2 as the upper surface of the mounting caulking portion 7a are formed flat as shown in FIGS. 5 (a) and 5 (b). The inner side surface 7a-3, which is the inner surface of the mounting caulking portion 7a, is formed into a curved surface that is a straight line in the cross section including the axis O.

  As shown in FIGS. 5 (a) and 5 (b), the attachment connecting portion 7b is a cylinder which is erected from the outer edge of the attachment caulking portion 7a toward the upper outer side (the upper outer side in FIG. 5 (a)). It is configured in shape.

  Further, the mounting bracket 7 is formed by being punched from above (FIG. 5 (a) and FIG. 5 (b)) by a press machine (not shown), so that the upper portion of the inner edge of the mounting caulking portion 7a (see FIG. 5 (a) and FIG. 5 (b) upper part) are formed in a rounded shape (see FIG. 11).

  The mounting flange portion 7c is located radially outward from the upper end (FIG. 5 (a) and FIG. 5 (b) upper end) of the mounting connection portion 7b and centered on the axis O (FIG. 5 (a) and FIG. 5 (b)) The mounting holes 7c-1 are provided at both ends (both ends in FIGS. 5A and 5B).

  As shown in FIG. 4, the pair of mounting holes 7 c-1 are formed through the mounting flange portion 7 c at positions facing each other by 180 degrees. A bolt (not shown) is inserted into the mounting hole 7c-1 and fastened, whereby the liquid filled type vibration damping device 100 is attached to the vehicle body frame side.

  FIG. 6 is a top view of the cylindrical metal fitting 8. 7 is a diagram showing a cross section of the cylindrical metal fitting 8, FIG. 7 (a) is a cross sectional view of the cylindrical metal fitting 8 along the line VIIa-VIIa in FIG. 6, and FIG. It is sectional drawing of the cylindrical metal fitting 8 in the VIIb-VIIb line | wire. FIG. 8 is a cross-sectional view of the cylindrical fitting 8 taken along line VIII-VIII in FIG.

  As shown in FIGS. 7 (a) and 7 (b), the cylindrical metal fitting 8 is press-formed from a flat plate made of a steel material to a plate thickness T4, and includes a cylindrical caulking portion 8a, A cylindrical contact portion 8b, a cylindrical portion 8c, a cylindrical lower caulking portion 8d, and a cylindrical enlarged diameter portion 8e.

  The cylindrical caulking portion 8a is a portion for caulking the mounting caulking portion 7a (see FIGS. 5A and 5B) of the mounting bracket 7, and FIG. 6, FIG. 7A and FIG. As shown in b), it is configured in a cylindrical shape having an inner diameter D6 and an outer diameter D7 and a height H1 when viewed from above (viewed in the vertical direction in FIG. 6). The upper outer surface 8a-1 and the lower outer surface 8a-2, which are the outer surfaces of the cylindrical caulking portion 8a, are formed into curved surfaces that are straight in the cross section including the axis O.

  The lower outer surface 8a-2 has a plate thickness dimension T3 of the mounting bracket 7 from the upper surface 8b-1 to be described later in the protruding direction of the cylindrical caulking portion 8a (upward direction in FIGS. 7 (a) and 7 (b)). The upper outer surface 8a-1 is a surface of a region having a height H4 having the same height dimension value as that of the cylindrical caulking portion 8a from the lower outer surface 8a-2 (see FIGS. 7A and 7). (B) The remaining surfaces coupled in the upward direction).

  The outer diameter D7 of the cylindrical caulking portion 8a is set to a dimension value larger than the inner diameter D5 of the mounting caulking portion 7a (see FIGS. 5A and 5B) (D7> D5), and the cylindrical caulking portion 8a. The height H1 of the portion 8a is obtained by adding the plate thickness dimension T3 (see FIGS. 5A and 5B) of the mounting bracket 7 and the inner diameter D5 of the mounting caulking portion 7a to the cylindrical caulking portion 8a. Is set to a larger dimension value than the value obtained by subtracting the outer diameter D7 (H1> T3 + D5-D7). The plate thickness dimension T4 of the cylindrical caulking portion 8a is set to a smaller dimension value than the plate thickness dimension T3 of the mounting bracket 7 described above (see FIGS. 5A and 5B) (T4 < T3).

  The cylindrical abutting portion 8b is a portion for caulking the mounting caulking portion 7a (see FIGS. 5A and 5B) of the mounting bracket 7. As shown in FIG. 6 in the vertical direction of the paper, the ring is formed with an inner diameter D6 and an outer diameter D8, and the inner edge thereof is connected to the lower end of the cylindrical caulking portion 8a (the lower ends of FIGS. 7A and 7B). Further, the inner diameter D6 of the cylindrical contact portion 8b is set to a dimensional value smaller than the outer diameter D4 (see FIGS. 3A and 3B) of the lower stopper contact portion 5c (D6 <D4). ).

  As described above, the outer diameter D7 of the cylindrical caulking portion 8a is set to a larger dimensional value than the inner diameter D5 (see FIGS. 5A and 5B) of the mounting caulking portion 7a of the mounting bracket 7. Therefore (D7> D5), the cylindrical caulking portion 8a can be fitted into the mounting caulking portion 7a (see FIGS. 5A and 5B).

  Further, since the inner edge of the cylindrical abutting portion 8b is connected to the lower end of the cylindrical caulking portion 8a (the lower end of FIGS. 7A and 7B), the cylindrical caulking portion 8a is connected to the mounting caulking portion 7a. When fitted, the lower surface 7a-1 (the lower surface in FIGS. 5 (a) and 5 (b)) of the mounting caulking portion 7a (see FIGS. 5 (a) and 5 (b)) is the cylindrical contact portion 8b. It abuts on the upper surface 8b-1 (the upper surface of FIGS. 7A and 7B) (see FIG. 11).

  The height H1 of the cylindrical caulking portion 8a is obtained by adding the plate thickness dimension T3 (see FIGS. 5A and 5B) of the mounting bracket 7 and the inner diameter D5 of the mounting caulking portion 7a. Since the dimension value is set to be larger than the value obtained by subtracting the outer diameter D7 of the cylindrical caulking portion 8a (H1> T3 + D5-D7), the cylindrical caulking portion 8a is fitted into the mounting caulking portion 7a and the caulking portion thereof is attached. In the state where the lower surface 7a-1 (see FIGS. 5A and 5B) of 7a is in contact with the upper surface 8b-1 of the cylindrical contact portion 8b, the cylindrical caulking portion 8a is attached to the caulking portion 7a. By folding back to the side (outside of FIG. 7), the outer circumferential surface of the cylindrical caulking portion 8a can be brought into contact with the upper surface 7a-2 (see FIGS. 5A and 5B) of the mounting caulking portion 7a. (See FIG. 11).

  Therefore, the upper outer surface 8a-1 of the cylindrical caulking portion 8a can press down the upper surface 7a-2 (see FIGS. 5A and 5B) of the mounting caulking portion 7a. Therefore, the upper outer surface 8a-1 of the cylindrical caulking portion 8a contacts the upper surface 7a-2 of the mounting caulking portion 7a, and the upper surface 8b-1 of the cylindrical abutting portion 8b contacts the lower surface 7a-1 of the mounting caulking portion 7a. The attachment caulking portion 7a can be caulked and fixed in contact. As a result, the cylindrical fitting 8 and the attachment fitting 7 can be integrated (see FIG. 11).

  Further, since the plate thickness dimension T4 of the cylindrical metal fitting 8 is set to be smaller than the plate thickness dimension T3 of the attachment metal fitting 7 (T4 <T3), the strength of the cylindrical caulking portion 8a is made lower than the strength of the attachment caulking portion 7a. be able to. Therefore, when the attachment caulking portion 7a (see FIGS. 5A and 5B) is caulked by the cylindrical caulking portion 8a, the cylindrical caulking portion 8a is easily deformed with respect to the attachment caulking portion 7a. be able to.

  Therefore, the cylindrical caulking portion 8a can be deformed according to the shape of the mounting caulking portion 7a (see FIGS. 5A and 5B), so that the shape of the mounting caulking portion 7a is maintained and the liquid-filled type. It can be set as the shape which aimed at the product shape of the vibration isolator 100 (refer FIG. 11).

  Further, since the plate thickness dimension T4 of the cylindrical fitting 8 is set to a smaller dimension value than the plate thickness dimension T3 of the mounting fitting 7, the pressing force required to caulk the fitting fitting 7 with the cylindrical fitting 8 is increased. Without doing so, it is possible to improve the strength of the overhanging parts (mounting caulking portion 7a, cylindrical caulking portion 8a, and cylindrical abutting portion 8b).

  That is, by increasing only the plate thickness dimension T3 of the mounting bracket 7, it is possible to improve the strength of the overhanging portions (the mounting caulking portion 7a, the cylindrical caulking portion 8a, and the cylindrical abutting portion 8b). Therefore, since it is not necessary to increase the plate thickness dimension T4 of the cylindrical metal fitting 8, without changing the press machine for caulking the attachment metal fitting 7 with the cylindrical metal fitting 8 to a large one that can generate a large pressing force, It is possible to easily secure the strength necessary for obtaining a stopper action at the time of large displacement.

  Further, the plate thickness dimension T4 of the cylindrical metal fitting 8 is set to a smaller dimension value than the plate thickness dimension T3 (see FIGS. 5A and 5B) of the mounting bracket 7 described above (T4 <T3). ) Since the upper part (see FIG. 11) of the inner edge of the attachment caulking portion 7a is formed in a rounded shape, when the attachment caulking portion 7a is caulked by the cylindrical caulking portion 8a, the cylindrical caulking portion 8a is It can be formed into a rounded shape according to the shape of the upper part (upper part of FIG. 5) of the inner edge of the attachment caulking part 7a.

  Therefore, the cylindrical caulking portion 8a is prevented from being formed into a sharp shape, and high stress is prevented from being generated in the cylindrical caulking portion 8a, thereby improving the durability of the cylindrical caulking portion 8a. be able to. As a result, the durability of the liquid filled type vibration damping device 100 can be improved.

  Further, the inner diameter D6 of the cylindrical abutting portion 8b is set to be smaller than the outer diameter D4 of the lower stopper abutting portion 5c (see FIGS. 3A and 3B) (D6 < D4) The lower stopper contact portion 5c described above is in contact with the lower surface of the cylindrical contact portion 8b (the lower surfaces of FIGS. 7A and 7B) through the vibration-proof substrate 3 (FIG. 7). 1). Therefore, the stopper action at the time of large displacement can be obtained.

  Further, the inner diameter D61 (see FIG. 11) of the cylindrical caulking portion 8a in the state where the mounting caulking portion 7a is caulked is the outer diameter D4 of the lower stopper abutting portion 5c (see FIGS. 3 (a) and 3 (b)). Since the smaller dimension value is set (D61 <D4), the lower stopper contact portion 5c is locked by the cylindrical caulking portion 8a that caulks the attachment caulking portion 7a. Therefore, the stopper action at the time of large displacement can be obtained.

  As described above, the cylindrical caulking portion 8a is fitted into the mounting caulking portion 7a so that the caulking portion 8a is caulked, so that an overhanging portion projecting inwardly for caulking (attachment) A caulking portion 7a, a cylindrical caulking portion 8a, and a cylindrical abutting portion 8b) are formed. Therefore, the lower stopper abutting portion 5c of the lower stopper metal fitting 5 is brought into contact with the overhanging portion via the vibration isolation base 3, so that the stopper action can be exerted (see FIG. 1).

  As described above, the overhang portion (mounting caulking portion 7a, cylindrical caulking portion 8a, and cylindrical abutting portion 8b) formed by caulking the mounting bracket 7 with the cylindrical fitting 8 exhibits a stopper action. Separately, it is possible to omit forming a portion that exhibits a stopper action. Therefore, the trouble of assembling the liquid-filled vibration isolator 100 can be saved, and the product cost of the liquid-filled vibration isolator 100 can be reduced.

  Further, as shown in FIG. 8, the upper surface of the cylindrical abutting portion 8b is uneven for discharging press oil (lubricating oil interposed between the press die and the pressed part for smooth press forming). It is formed in a shape and includes a plurality (36 in the present embodiment) of groove portions 8f.

  The groove portion 8f is a groove having a rectangular cross section with a depth H2 that is recessed at equal intervals along the circumferential direction of the cylindrical contact portion 8b on the upper surface 8b-1 of the cylindrical contact portion 8b. At the same time as the press molding of 8, press molding is formed. Therefore, since the labor of processing the groove 8f can be saved, the product cost of the liquid filled type vibration damping device 100 can be reduced.

  Further, when the mounting caulking portion 7a is caulked to the cylindrical caulking portion 8a, the lower surface 7a-1 of the mounting caulking portion 7a is brought into contact with the upper surface 8b-1 of the cylindrical abutting portion 8b (FIG. 11). reference). Therefore, a gap having a depth H2 is formed between the lower surface 7a-1 of the attachment caulking portion 7a and the bottom surface 8f-1 of the groove portion 8f (see FIG. 11). This gap is for discharging press oil, and details will be described later with reference to FIG.

  Further, as shown in FIG. 8, the width W2 in the circumferential direction (left-right direction in FIG. 8) of the groove 8f is a dimension value larger than the interval W1 in the circumferential direction (left-right direction in FIG. 8) with the adjacent groove 8f. (W2> W1). Therefore, the press oil can be discharged efficiently. The groove portion 8f is configured to have a shape whose width increases toward the outer side in the radial direction (the outer side in the radial direction of the circle centering on the axis O in FIG. 6), but within the range in which the groove portion 8f is recessed. Thus, the width W2 and the interval W1 are formed so as to ensure a magnitude relationship at all radial positions.

  As shown in FIG. 6, the groove 8 f has a shape that becomes wider toward the outer side in the radial direction with the axis O as the center. As will be described later, in assembling the liquid-filled vibration isolator 100, there is a degreasing process by sandblasting after the mounting caulking portion 7a is caulked with the cylindrical caulking portion 8a. In the process, sand used for sandblasting enters the groove portion 8f, but sand can be reliably discharged by making the groove portion 8f wider toward the outside in the radial direction. Therefore, it is possible to prevent the sand from remaining in the groove 8f and reliably discharge the press oil.

  Moreover, one edge in the adjacent groove part 8f is formed in parallel with the other edge, and the groove part 8f is press-molded simultaneously with the press-molding of the cylindrical fitting 8. Here, since the press die transfers the shape of the groove 8f, the portion for forming the groove 8f is formed so as to protrude.

  In order to form the protruding portion, it is necessary to scrape between the portions that become the protruding portion. Here, if the edges of the adjacent groove portions 8f are formed in parallel, the protruding portion can be formed by processing a groove having a constant width.

  For example, if an end mill having the same diameter as the width of the ridge is used, both sides of the groove can be processed at a time. Therefore, the labor for manufacturing the press mold can be saved, and the product cost of the liquid filled type vibration damping device 100 can be reduced.

  Further, as described above, when the width W2 in the circumferential direction (left and right direction in FIG. 8) of the groove 8f is set to a dimension value larger than the interval W1 in the circumferential direction (left and right direction in FIG. 8) with the adjacent groove 8f, the cylinder The problem that the intensity | strength of the shape contact part 8b falls arises.

  On the other hand, in the first embodiment, the depth H2 of the groove 8f is set to 1/3 times the plate thickness dimension T4 of the cylindrical contact portion 8b. For this reason, it is possible to prevent the strength of the cylindrical abutting portion 8b from being lowered and to ensure press oil discharge efficiency. The depth H2 of the groove 8f is preferably set to 1/2 to 1/4 times the plate thickness dimension T4 of the cylindrical abutting portion 8b.

  As shown in FIGS. 7A and 7B, the cylindrical portion 8c stands downward (downward in FIGS. 7A and 7B) from the outer edge of the cylindrical contact portion 8b. It has a cylindrical shape with an inner diameter D9. The inner diameter D9 of the cylindrical portion 8c is prevented from being vulcanized and molded on the inner peripheral surface of the cylindrical portion 8c to the outer diameter D4 (see FIGS. 3A and 3B) of the lower stopper contact portion 5c. The dimension value is set larger than the dimension value obtained by adding twice the thickness of the vibration base 3. Therefore, a gap is formed between the outer diameter D4 (see FIG. 3) of the lower stopper fitting 5 and the vibration-proof base 3 vulcanized and formed on the inner peripheral surface of the cylindrical portion 8c (see FIG. 1).

  As shown in FIGS. 6, 7A and 7B, the cylindrical lower caulking portion 8d is formed in a ring shape when viewed from the top (viewed in the vertical direction in FIG. 6), and the inner edge thereof is the cylindrical portion 8c. Is connected to the lower end (the lower ends of FIGS. 7A and 7B). The cylindrical enlarged diameter portion 8e is formed in a cylindrical shape standing from the outer edge of the cylindrical lower caulking portion 8d downward (downward in FIGS. 7A and 7B). The caulking is fixed.

  FIG. 9 is a view showing the bottom metal fitting 9, FIG. 9 (a) is a top view of the bottom metal fitting 9, and FIG. 9 (b) is a diagram of the bottom metal fitting 9 along the line IXb-IXb in FIG. 9 (a). It is sectional drawing.

  As shown in FIGS. 9 (a) and 9 (b), the bottom metal fitting 9 is press-formed from a flat plate made of a steel material and is circular in a top view (FIG. 9 (a) a view perpendicular to the paper surface). It is formed in a flat plate shape. Moreover, the bottom metal fitting 9 is attached to the cylindrical enlarged diameter portion 8e on the lower end side of the cylindrical metal fitting 8 in which the vibration-proof base 3 is vulcanized (see FIG. 1). Therefore, a liquid sealing chamber 10 is formed between the upper surface side of the bottom metal fitting 9 and the lower surface side of the vibration isolation base 3. Silicon oil is sealed in the liquid sealing chamber 10.

  Here, since the lower stopper fitting 5 (refer to FIG. 1) moves in a liquid sealing chamber 10 to be described later, silicon oil that fills the inside of the liquid sealing chamber 10 flows through the gaps described above, and the liquid sealing type vibration isolation The device 100 can exert a damping effect.

  Next, an assembly method of the liquid-filled vibration isolator 100 configured as described above will be described with reference to FIGS. 4 to 7, 10, and 11. FIG. 10A shows a liquid-filled vibration isolator before vulcanization disposed in a vulcanization mold for vulcanizing the vibration-proof substrate 3 (assembled into a liquid-filled vibration-proof device 100 after vulcanization). FIG. 10B is a cross-sectional view of the liquid-filled vibration isolator after vulcanization (assembled in the liquid-filled vibration isolator 100). FIG. 11 is a partial enlarged cross-sectional view of the mounting bracket 7 in which the portion indicated by XI in FIG. 10 is enlarged. In addition, the arrow of the broken line shown in FIG. 11 has shown the outline of the flow of press oil.

  The assembly of the liquid-filled vibration isolator 100 is first performed by attaching the crimped portion 7a of the mounting bracket 7 shown in FIGS. 4 and 5 to the cylindrical crimped portion 8a of the cylindrical bracket 8 before crimping shown in FIGS. Are fitted, the cylindrical caulking portion 8a is bent toward the mounting caulking portion 7a, and the mounting bracket 7 is caulked and fixed by the cylindrical metal fitting 8.

  Next, in order to prepare a base for vulcanizing and bonding the rubber-like elastic body to the mounting bracket 7 and the cylindrical bracket 8, sandblasting is performed in which sand particles collide with the inner surfaces of the crimped mounting bracket 7 and the cylindrical bracket 8. Apply. The inner peripheral surfaces of the mounting fitting 7 and the cylindrical fitting 8 are thinly cut by the sandblasting. Therefore, the press oil attached to the surface of the inner peripheral surface is removed and the surface is shaved with sand particles, so that the surface area of the inner peripheral surface is increased and the adhesive force of the adhesive in vulcanization bonding can be improved.

  For example, when degreasing is performed in the sandblasting process in a state where the press-molded mounting bracket 7 and the cylindrical bracket 8 are separated, there is a problem that the number of processes increases in order to degrease two parts, and degreasing is performed. There is a problem in that oil adhering to the caulking mold for subsequent caulking adheres to the inner peripheral surface of the cylindrical metal fitting 8.

  Here, in the first embodiment, since the mounting bracket 7 and the cylindrical bracket 8 are degreased after the mounting bracket 7 and the cylindrical bracket 8 are caulked, oil is applied to the inner peripheral surface of the cylindrical bracket 8. Adhesion of the adhesive in vulcanization adhesion can be improved by preventing adhesion. And the adhesive agent of the internal peripheral surface of the attachment metal fitting 7 and the cylindrical metal fitting 8 which were sandblasted is apply | coated.

  Here, the mounting bracket 7 and the cylindrical bracket 8 coated with the adhesive, the lower stopper bracket 5 and the first mounting bracket 1 are placed in a vulcanization mold (not shown) and heated, A rubber-like elastic body is injected into the vulcanization mold, and a part of the lower surface (lower surface in FIG. 10) of the upper stopper metal 4 and the outer peripheral surface of the connecting member 6, the inner peripheral surface of the mounting metal 7, and the cylindrical metal 8 The anti-vibration base 3 is vulcanized and bonded to the inner peripheral surface.

  As a result, a vulcanized molded body (liquid-filled vibration isolator 100) before the bottom metal fitting 9 shown in FIG. 10B is attached is obtained. And these are taken out from a vulcanization mold (not shown), the lower stopper metal fitting 5 is inserted into the external thread 6a and fastened with a nut N, and then the bottom metal fitting 9 is attached to the inner periphery of the cylindrical enlarged diameter portion 8e. Deploy. And after arrange | positioning the bottom metal fitting 9, the assembly of the liquid filling type vibration isolator 100 is completed by crimping the cylindrical enlarged diameter part 8e of the cylindrical metal fitting 8. FIG.

  Here, in vulcanization molding, heat is applied in order to vulcanize the rubber-like elastic body, so that heat is used to press oil (the lubrication interposed between the press die and the pressed part in order to perform the press molding smoothly. Oil) is heated to lower the viscosity. Therefore, the press oil that has adhered to the surface of the mounting bracket 7 and the surface of the cylindrical bracket 8 flows out.

  In this case, when the flowing press oil flows into the inner peripheral surface of the mounting bracket 7 and the inner peripheral surface of the cylindrical bracket 8, it flows into the surface of the applied adhesive, so that the adhesive strength of the adhesive deteriorates. There is.

  Here, in the first embodiment, as shown in FIG. 11, the groove portion 8f is provided to form a gap of depth H2, and the gap communicates with the outside. The press oil that has flowed out from the inner peripheral surface of the mounting bracket 7 and the inner peripheral surface of the cylindrical bracket 8 can be discharged to the outside using the gap. Therefore, it can prevent that the press oil which flowed out adheres to the internal peripheral surface of the attachment metal fitting 7, and the internal peripheral surface of the cylindrical metal fitting 8, and can improve the adhesive force of the adhesive in vulcanization adhesion.

  Further, as shown in FIG. 11, the mounting caulking portion 7a is caulked by the cylindrical caulking portion 8a, so that the upper outer surface 8a-1 of the cylindrical caulking portion 8a is pressed against the upper surface 7a-2 of the mounting caulking portion 7a. The The upper surface 7a-2 of the mounting caulking portion 7a is formed flat by press molding, and the upper outer surface 8a-1 of the cylindrical caulking portion 8a is applied to the upper surface 7a-2 of the mounting caulking portion 7a by a caulking force. It is pressed and deformed according to the surface shape of the upper surface 7a-2 of the mounting caulking portion 7a. Therefore, the gap between the upper outer surface 8a-1 of the cylindrical caulking portion 8a and the upper surface 7a-2 of the mounting caulking portion 7a can be reduced to seal the press oil from leaking out.

  Further, since the inner diameter D5 of the mounting caulking portion 7a is set to be larger than the outer diameter D7 of the cylindrical caulking portion 8a (D5> D7), as shown in FIG. When the mounting caulking portion 7a is inserted into the caulking portion 8a and caulked, a gap S1 is formed between the lower outer surface 8a-2 of the cylindrical caulking portion 8a and the inner side surface 7a-3 of the mounting caulking portion 7a. The

  For example, the outer diameter D7 of the cylindrical caulking portion 8a and the inner diameter D5 of the mounting caulking portion 7a are substantially the same size, and the lower outer surface 8a-2 of the cylindrical caulking portion 8a and the inner side surface 7a-3 of the mounting caulking portion 7a. Are in a state where the cylindrical contact portion 8b side (the lower side in FIG. 11) is sealed from the upper surface 7a-2 of the mounting caulking portion 7a, making it difficult to discharge the press oil. A malfunction occurs.

  When the sealing performance of the sealed portion is higher than the sealing performance of the upper surface 7a-2 of the mounting caulking portion 7a and the upper outer surface 8a-1 of the cylindrical caulking portion 8a, press oil is attached to the mounting caulking portion 7a. Leaks from between the upper surface 7a-2 and the upper outer surface 8a-1 of the cylindrical caulking portion 8a, and flows out onto the adhesive applied to the inner peripheral surfaces of the mounting bracket 7 and the cylindrical bracket 8. Therefore, the malfunction that the adhesive force of an adhesive agent falls will generate | occur | produce.

  On the other hand, in the first embodiment, the gap S1 is formed between the lower outer surface 8a-2 of the cylindrical caulking portion 8a and the inner side surface 7a-3 of the mounting caulking portion 7a. It is discharged from the groove 8f through the gap S1. As a result, it is possible to prevent the press oil from flowing into the inner peripheral surfaces of the mounting bracket 7 and the cylindrical bracket 8 and to efficiently discharge the press oil from the groove 8f.

  The groove 8f is formed from a position spaced apart from the lower outer surface 8a-2 of the cylindrical caulking portion 8a by a predetermined distance, and the diameter of the circle connecting the end on the axis O side of the groove 8f is the mounting caulking portion. It is set smaller than the inner diameter D5 of 7a.

  Therefore, when the mounting caulking portion 7a is inserted into the cylindrical caulking portion 8a and caulked with the shaft center O aligned, the groove portion 8f can be communicated with the gap S1.

  Moreover, since the cylindrical metal fitting 8 is a press-molded product, the surface on the side opposite to the surface pressed by the press machine cannot be processed with high accuracy due to the occurrence of burrs or the like. For this reason, when the press-molded cylindrical fitting 8 is assembled to the mounting fitting 7, the connection between the groove 8f and the gap S1 may be partially blocked depending on the case.

  In that case, the press oil is not discharged into the groove portion 8f, and the press oil leaks from between the upper surface 7a-2 of the mounting caulking portion 7a and the upper outer surface 8a-1 of the cylindrical caulking portion 8a, and the mounting bracket 7 and the cylinder This causes a problem that the adhesive flows out onto the adhesive applied to the inner peripheral surface of the metal fitting 8 and the adhesive strength of the adhesive is reduced.

  On the other hand, in the first embodiment, the lower end on the inner edge side of the caulking portion 7a of the mounting bracket 7 is scraped linearly in a cross section having a predetermined angle with respect to the axis O and including the axis O. Yes. For this reason, a gap S2 is formed on the inner edge side of the attachment caulking portion 7a with respect to the upper surface 8b-1 of the cylindrical contact portion 8b.

  Therefore, the gap S2 is interposed between the gap S1 and the groove 8f, so that the connection between the groove 8f and the gap S1 is ensured.

  Therefore, the press oil is discharged from the groove 8f through the gap S1. As a result, it is possible to prevent the press oil from flowing into the inner peripheral surfaces of the mounting bracket 7 and the cylindrical bracket 8 and to efficiently discharge the press oil from the groove 8f.

  For example, when the mounting bracket 7 and the cylindrical bracket 8 are connected by welding, there is a problem that the mounting bracket 7 and the cylindrical bracket 8 are deformed by the heat of welding. On the other hand, in the first embodiment, the mounting bracket 7 and the cylindrical bracket 8 are connected by caulking the mounting bracket 7 with the cylindrical bracket 8. Deformation due to heat can be prevented.

  Similarly, when the mounting bracket 7 and the cylindrical bracket 8 are connected by welding, the temperature of the mounting bracket 7 and the cylindrical bracket 8 is increased by welding, but the higher the temperature, the higher the room temperature. The degree of temperature drop due to is large, and the temperature of the mounting bracket 7 and the cylindrical bracket 8 is not stable. Therefore, the conditions for vulcanization molding become unstable, and the adhesive force of the adhesive becomes non-uniform.

  Therefore, a process for stabilizing the temperature of the mounting bracket 7 and the cylindrical bracket 8 such as cooling the mounting bracket 7 and the cylindrical bracket 8 for a predetermined time is required, and it takes time to assemble the liquid-filled vibration isolator 100. There is a problem that the product cost of the liquid filled type vibration damping device 100 increases.

  On the other hand, in the first embodiment, the mounting bracket 7 and the cylindrical bracket 8 are connected by caulking the mounting bracket 7 with the cylindrical bracket 8. It is possible to prevent heat from being applied. Therefore, the process of stabilizing the temperature of the mounting bracket 7 and the cylindrical bracket 8 can be eliminated. Therefore, the assembly time can be shortened and the product cost of the liquid-filled vibration isolator 100 can be reduced.

  Next, a second embodiment will be described with reference to FIGS. FIG. 12 is a top view of the mounting bracket 207 in the second embodiment. 13 is a cross-sectional view of the mounting bracket 207, FIG. 13 (a) is a cross-sectional view of the mounting bracket 207 along the line XIIIa-XIIIa in FIG. 12, and FIG. 13 (b) is a cross-sectional view of FIG. It is sectional drawing of the attachment metal fitting 207 in the XIIIb-XIIIb line | wire. 14 is a cross-sectional view of the mounting bracket 207 along the line XIV-XIV in FIG.

  In the first embodiment, the groove 8f is recessed on the upper surface (upper surface in FIG. 8) of the cylindrical abutting portion 8b of the tubular metal member 8. However, in the second embodiment, the groove 8f is recessed on the tubular metal member 8. The groove portion 8f is omitted, and the groove portion 207f is recessed in the lower surface (lower surface in FIG. 13) of the mounting crimp portion 207a of the mounting bracket 207. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 12, 13A, and 13B, the groove portion 207f in the second embodiment is formed on the lower surface of the mounting caulking portion 207a (the lower surface of FIGS. 13A and 13B). It is a groove having a depth H2 that is recessed, and is disposed at equal intervals around the entire circumference of the mounting caulking portion 207a.

  Therefore, when the cylindrical caulking portion 8a (see FIG. 7) is fitted into the mounting caulking portion 207a, the upper surface 8b-1 (see FIG. 11) of the cylindrical abutting portion 8b is brought into contact with the lower surface 207a-1. The Therefore, a gap having a depth H2 is formed between the upper surface 8b-1 of the cylindrical caulking portion 8a and the bottom surface of the groove portion 207f provided in the attachment caulking portion 207a.

  Further, as shown in FIG. 14, the width W202 in the circumferential direction (left and right direction in FIG. 14) of the groove 207f is a larger dimension value than the interval W201 in the circumferential direction (left and right direction in FIG. 8) with the adjacent groove 207f. (W202> W201). The groove portion 207f is configured to have a shape in which the width increases toward the outer side in the radial direction (the outer side in the radial direction of the circle centering on the axis O in FIG. 12). Thus, the width W202 and the interval W201 are formed so as to ensure a magnitude relationship at all radial positions.

  As described above, in the second embodiment, as in the first embodiment, a gap having a depth H2 is formed, and the gap communicates with the outside. The press oil that has flowed out from the inner peripheral surface of the metal fitting 7 and the inner peripheral surface of the cylindrical metal fitting 8 can be discharged to the outside. Therefore, it can prevent that the press oil which flowed out adheres to the internal peripheral surface of the attachment metal fitting 7, and the internal peripheral surface of the cylindrical metal fitting 8, and can improve the adhesive force of the adhesive in vulcanization adhesion.

  Next, a third embodiment will be described with reference to FIG. FIG. 15 is a cross-sectional view of the tubular fitting 308 in the third embodiment, and corresponds to the sectional view of the tubular fitting 8 of FIG.

  In the first and second embodiments, the width W2 of the groove portion 8f in the circumferential direction (left and right direction in FIG. 8) is larger than the distance W1 between the adjacent groove portions 8f in the circumferential direction (left and right direction in FIG. 8). However, in the third embodiment, the width W302 in the circumferential direction (left-right direction in FIG. 15) of the groove 308f of the cylindrical metal fitting 308 is circumferential with respect to the adjacent groove 308f (see FIG. 15). The dimension value is set to be smaller than the interval W301 (8 horizontal directions) (W302 <W301). In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment and 2nd Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 15, the width W302 in the circumferential direction (left and right direction in FIG. 15) of the groove 308f of the cylindrical metal fitting 308 in the third embodiment is the circumferential direction (left and right direction in FIG. 8) with the adjacent groove 308f. The dimension value is set to be smaller than the interval W301 (W302 <W301). The groove portion 308f is configured to have a shape that increases in width toward the radially outer side (the rear side in the vertical direction in FIG. 15). However, all the positions in the radial direction are within the range where the groove portion 308f is recessed. Thus, the width W302 and the interval W301 are formed so as to ensure a magnitude relationship.

  Therefore, since the area of the upper surface of the cylindrical abutting portion 308b can be secured widely, the mounting caulking portion 7a (see FIG. 4) of the mounting bracket 7 is securely caulked with the cylindrical bracket 308 accordingly. be able to. In addition, since the area is secured widely, even if caulking force is applied to the cylindrical contact portion 308b, the pressure applied to the upper surface of the cylindrical contact portion 308b is kept low and the shape of the cylindrical contact portion 308b is maintained. can do.

  Next, a fourth embodiment will be described with reference to FIG. FIG. 16 is a cross-sectional view of the cylindrical fitting 408 in the fourth embodiment, and corresponds to the sectional view of the cylindrical fitting 8 of FIG.

  In the first embodiment and the second embodiment, the groove portion 8f is configured as a groove having a rectangular cross section, but in the fourth embodiment, the groove portion 408f of the cylindrical metal fitting 408 is configured as a groove having a triangular cross section. Yes. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment and 2nd Embodiment, and the description is abbreviate | omitted.

  The groove part 408f of the cylindrical metal fitting 408 in the fourth embodiment is configured as a groove having a triangular cross section as shown in FIG. Therefore, since the apex on the upper side of the triangular shape (upper side in FIG. 16) is brought into contact with the lower surface 7a-1 (see FIG. 4) of the mounting caulking portion 7a, when it is fixed by caulking with the cylindrical metal fitting 408, By increasing the contact pressure of the mounting bracket 7 to the caulking portion 7a, it is possible to prevent the mounting bracket 7 from slipping in the circumferential direction (left-right direction in FIG. 16) with respect to the cylindrical bracket 408. Therefore, the mounting caulking portion 7a of the mounting bracket 7 can be securely caulked and fixed by the cylindrical bracket 408. As a result, the liquid filled type vibration damping device 100 can be reliably assembled.

  Next, a fifth embodiment will be described with reference to FIGS. FIG. 17 is a cross-sectional view of the liquid-filled vibration isolator 500 according to the fifth embodiment, and corresponds to the cross-sectional view of the liquid-filled vibration isolator 100 of FIG.

  In addition, while the arrow X shown in FIG. 17 shows the horizontal direction of the liquid filled type vibration isolator 500, the arrow Y shows the vertical direction of the liquid filled type vibration isolator 500, and these arrow X and arrow Y are These correspond to the left-right direction and the up-down direction of the automobile (vehicle), respectively. In order to facilitate understanding, the nut N and the male screw 506a shown in FIG.

  FIG. 18 is a view showing the intermediate plate 511 in the fifth embodiment, FIG. 18 (a) is a top view of the intermediate plate 511, and FIG. 18 (b) is an XVIIIb− of FIG. 18 (a). It is sectional drawing of the intermediate | middle board 511 in a XVIIIb line.

  In each of the above embodiments, the case has been described in which the liquid sealing chamber 10 is sealed with the bottom fitting 9 configured in a flat plate shape from a steel material. In the fifth embodiment, the bottom fitting 509 includes the rubber film 509c. The rubber film 509c is configured to be displaced in conjunction with the displacement of the first mounting bracket 501. In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  In the fifth embodiment, the liquid-filled vibration isolator 500 includes a first mounting bracket 501 and a second mounting bracket 502. The first mounting bracket 501 includes an anti-vibration base 503 and a connecting member 506, and the anti-vibration base 503 includes an intermediate plate 511 as shown in FIGS.

  The intermediate plate 511 is formed of a steel material and is formed in a cylindrical shape having the same axis O as a connecting member base 506b described later, inside the mounting bracket 7 and outside the connecting member 506 described later. It is arranged concentrically and embedded in the rubber-like elastic body of the vibration-proof base 503.

  Therefore, the anti-vibration base 503 is hardly deformed, and the spring constant of the anti-vibration base 503 in the horizontal direction (left-right direction, arrow X direction) can be set high. As a result, since the amplitude can be suppressed, it is possible to prevent an excessive touch of the cab. Note that the lower end (the lower end in FIG. 17) of the intermediate plate 511 is exposed from the anti-vibration base 503 as a fixed part when the anti-vibration base 503 is vulcanized.

  As shown in FIG. 17, the connecting member 506 includes a male screw 506a, a connecting member base 506b, a connecting member extension 506c, and a connecting member collar 506d.

  A lower stopper fitting 5, a connecting member collar 506d, and a bottom fitting 509 are fitted on the connecting member extension 506c. A nut N is attached to a male screw 506a formed at the lower end (the lower end in FIG. 17) of the connecting member base 506b. Are screwed together so that the lower stopper fitting 5, the connecting member collar 506d, and the bottom fitting 509 are sandwiched between the connecting member base 506b and the nut N. Therefore, the first mounting bracket 501 and the bottom bracket 509 can be integrated.

  The liquid-filled vibration isolator 500 includes a bottom metal fitting 509 as shown in FIG. The bottom metal fitting 509 is a member for forming a liquid sealing chamber 510 between the bottom metal fitting 509 and is attached below the cylindrical metal fitting 8 (lower side in FIG. 17). Note that silicon oil is sealed in the liquid sealing chamber 510.

  The bottom metal fitting 509 includes an inner ring 509a, an outer ring 509b, and a rubber film 509c. The inner ring 509 a is attached (connected) to the first mounting bracket 501, and the outer ring 509 b is caulked by the cylindrical enlarged diameter portion 8 e of the cylindrical bracket 8. The rubber film 509c is formed in a film shape from a rubber-like elastic body, and connects the outer ring 509b and the inner ring 509a.

  Therefore, when the first mounting bracket 501 is displaced, the inner ring 509a is displaced with respect to the outer ring 509b, and the rubber film 509c that connects the inner ring 509a and the outer ring 509b is deformed.

  According to the liquid filled vibration isolator 500 configured as described above, when the first mounting bracket 501 is displaced relative to the second mounting bracket 502, the lower stopper bracket 5 is displaced within the liquid sealing chamber 510. . Thereby, the silicone oil sealed in the liquid sealing chamber 510 becomes a resistance (silicon oil flows through the gap between the outer peripheral side of the lower stopper fitting 5 and the cylindrical portion 8c), thereby reducing the damping force. generate. As a result, vibration from the engine or the like can be prevented from being transmitted to the cab.

  As will be described later, according to the liquid-filled vibration isolator 500 in the present embodiment, the inner ring 509a of the bottom metal fitting 509 is connected to the first fixture 501 and the first fixture 501 is accompanied by vibration input. Is displaced so that the inner ring 509a of the bottom fitting 509 is displaced in the same phase as the first attachment 501. Therefore, it is possible to more reliably suppress an increase in the hydraulic pressure in the liquid sealing chamber 510, and The ratio between the spring constant in the direction and the spring constant in the vertical direction can be increased, and the ratio between the dynamic spring constant and the static spring constant can be decreased.

  Further, since the anti-vibration base 503 includes the intermediate plate 511, the spring constant in the horizontal direction (left-right direction, arrow X direction) is higher than the spring constant in the vertical direction (up-down direction, arrow Y direction). Can be set to a value. Thereby, coupled with the above-described effect obtained by connecting the bottom bracket 509 to the first mounting bracket 501, the ratio of the spring constant in the left-right direction (arrow X direction) and the vertical direction (arrow Y direction) can be increased. it can.

  Therefore, transmission of vibration to the cab side during idling or the like can be reduced while preventing the cab from swinging in the horizontal direction when the vehicle is turning.

  FIG. 19 is a cross-sectional view of the first mounting bracket 501 and corresponds to the cross-sectional view of the first mounting bracket 1 taken along the line IIb-IIb in FIG. In order to facilitate understanding, the nut N and the male screw 506a shown in FIG. 19 are side views.

  20 is a view showing the connecting member collar 506d, FIG. 20 (a) is a top view of the connecting member collar 506d, and FIG. 20 (b) is an XXb-XXb line in FIG. 20 (a). It is sectional drawing of the connection member color | collar 506d in.

  As shown in FIGS. 17 and 19, the connecting member base 506b is formed in a columnar shape having an axis O, and protrudes downward from the center of the rectangle of the upper stopper base 4a (downward in FIGS. 17 and 19). ing. Further, the outer diameter D10 of the connecting member base 506b is set larger than the inner diameter D3 (see FIG. 3) of the through hole formed in the lower stopper fitting 5.

  As shown in FIGS. 17 and 19, the connecting member extension 506c is formed in a cylindrical shape having the same axis O as the connecting member base 506b, and protrudes from the lower surface (the lower surfaces of FIGS. 17 and 19) of the connecting member base 506b. It is installed. The connecting member extension 506c has an outer diameter D11 corresponding to the inner diameter D3 (see FIG. 3) of the through hole formed in the lower stopper fitting 5, and the outer diameter D11 is the same as that of the connecting member base 506b. It is set smaller than the outer diameter D10.

  The male screw 506a is a male screw formed at the lower end (lower end in FIG. 17) of the connecting member extension 506c. As shown in FIGS. 17 and 20, the connecting member collar 506d is formed in a cylindrical shape and has an inner diameter D12 having the same size as the inner diameter D3 (see FIG. 3) of the through hole of the lower stopper fitting 5.

  21 is a view showing the bottom metal fitting 509, FIG. 21 (a) is a top view of the bottom metal fitting 509, and FIG. 21 (b) is a bottom metal fitting 509 taken along line XXIb-XXIb of FIG. 21 (a). FIG. 21C is a cross-sectional view of the bottom metal fitting 509 taken along line XXIc-XXIc in FIG.

  As shown in FIGS. 21A to 21C, the bottom metal fitting 509 includes an inner ring 509a, an outer ring 509b, and a rubber film 509c.

  As shown in FIGS. 21 (a) to 21 (c), the inner ring 509a is formed in an annular shape having an axis O and made of a steel material, and has an inner diameter D3 of the through hole of the lower stopper fitting 5. It has an inner diameter D13 having the same size as (see FIG. 3).

  As shown in FIG. 17, the lower stopper fitting 5, the connecting member collar 506d, and the bottom fitting 509 are connected in the order of the lower stopper fitting 5, the connecting member collar 506d, and the bottom fitting 509 from the connecting member base 506b toward the male screw 506a. The upper surface of the lower stopper fitting 5 is brought into contact with the lower surface (the lower surface in FIG. 17) of the connecting member base portion 506b. ) Is brought into contact with the upper surface (upper surface in FIG. 17) of the connecting member collar 506d, and the upper surface (upper surface in FIG. 17) of the bottom metal fitting 509 is brought into contact with the lower surface (lower surface in FIG. 17) of the connecting member collar 506d.

  Then, by screwing the nut N onto the male screw 506a, the lower stopper fitting 5, the connecting member collar 506d, and the inner ring 509a can be tightened with the connecting member base 506b and the nut N. As a result, the bottom bracket 509 and the first mounting bracket 501 can be integrated.

  As shown in FIGS. 21 (a) to 21 (c), the outer ring 509b is made of a steel material and is formed in an annular shape having an axis O, and has an inner diameter larger than the outer diameter of the inner ring 509a. Have. Further, as shown in FIG. 17, the outer ring 509b is attached to a cylindrical enlarged diameter portion 8e on the lower end side of the cylindrical metal fitting 8 on which the vibration-proof base 3 is vulcanized. Therefore, a liquid sealing chamber 510 is formed between the upper surface side of the bottom metal fitting 509 and the lower surface side of the vibration-proof base 503. Silicon oil is sealed in the liquid sealing chamber 510.

  As shown in FIGS. 21 (a) to 21 (c), the rubber film 509c is an annular shape constituted by a rubber-like elastic body that is vulcanized and bonded to the outer edge of the inner ring 509a and the inner edge of the outer ring 509b. It is a film. Therefore, when the first mounting bracket 501 is displaced with respect to the second mounting bracket 502, the inner ring 509a is displaced and the rubber film 509c is deformed. The relationship between the deformation of the rubber film 509c and the spring constant will be described later with reference to FIG.

  Further, as shown in FIGS. 21 (a) to 21 (c), ribs 509d project radially on the upper surface (upper surface in FIG. 21 (b)) and lower surface (lower surface in FIG. 21 (b)) of the rubber film 509c. It is installed. Accordingly, it is possible to suppress an increase in the dynamic spring constant at the time of inputting a small amplitude and secure the film rigidity of the rubber film 509c, thereby improving the durability of the rubber film 509c.

  Next, the relationship between the deformation of the rubber film 509c and the spring constant in the liquid-filled vibration isolator 500 will be described with reference to FIG. FIG. 22 is a cross-sectional view of the liquid-filled vibration isolator 500 showing a state in which the first mounting bracket 501 is relatively displaced toward the second mounting bracket 502 due to vibration input. Further, an arrow X shown in FIG. 22 indicates a horizontal direction of the liquid-filled vibration isolator 500, and an arrow Y indicates a vertical direction of the liquid-filled vibration isolator 500. These arrows X and Y are These correspond to the left-right direction and the up-down direction of the automobile (vehicle), respectively.

  For example, as shown in FIG. 22, when the first mounting bracket 501 is displaced in a direction approaching the second mounting bracket 502 (bound direction, downward in FIG. 22), the rubber film 509c itself of the bottom bracket 509 is elastically deformed. By doing so, it is possible to absorb the hydraulic pressure and suppress an increase in the hydraulic pressure in the liquid sealing chamber 510. Similarly, in the displacement in the rebound direction, the elastic pressure of the rubber film 509c itself can absorb the hydraulic pressure and suppress the increase in the hydraulic pressure.

  As a result, it is possible to suppress an increase in the spring constant in the vertical direction (up and down direction, arrow Y direction) due to the influence of the hydraulic pressure, and accordingly, the horizontal direction (left and right direction, arrow X direction) and the up and down direction The ratio of the spring constants can be increased. In addition, since the dynamic spring constant can be reduced by absorbing the hydraulic pressure by elastic deformation of the rubber film 509c in this way, the dynamic spring constant and the static spring constant in the vertical direction are accordingly reduced. The ratio can be reduced.

  Furthermore, according to the liquid-filled vibration isolator 500 in the present embodiment, when the inner ring 509a of the bottom metal fitting 509 is connected to the first fixture 501 and the first fixture 501 is displaced in response to vibration input, Since the inner ring 509a of the bottom metal fitting 509 is displaced in the same phase as that of the one mounting tool 501, the increase in the hydraulic pressure in the liquid sealing chamber 510 is more reliably suppressed, and the spring constant in the horizontal direction and the vertical direction It is possible to increase the ratio of the spring constant and the ratio of the dynamic spring constant to the static spring constant.

  That is, the first fixture 501 is displaced in the direction close to the second fixture 502 (the direction in which the vibration isolator base 3 is close to the bottom bracket 509, the downward direction in FIG. 22) by the vibration input in the vertical direction (arrow Y direction). When the vibration isolating base 3 attempts to compress the liquid in the liquid sealing chamber 510, the inner ring 509a and the rubber film 509c of the bottom metal fitting 509 are the same as the vibration isolating base 3 as shown in FIG. By displacing in conjunction with the phase direction (downward in FIG. 22), the increase of the fluid pressure in the fluid sealing chamber 510 to the positive pressure side can be mitigated.

  Similarly, in a direction in which the first attachment 501 is separated from the second attachment 502 by vibration input in the vertical direction (arrow Y direction) (a direction in which the vibration isolation base 3 is separated from the bottom metal fitting 509, an upward direction in FIG. 22). When the anti-vibration base 3 is displaced to expand the liquid in the liquid enclosure 510, the inner ring 509a and the rubber film 509c of the bottom metal fitting 509 are in the same phase as the anti-vibration base 3 (FIG. 22). By displacing in the upward direction, the increase of the hydraulic pressure in the liquid sealing chamber 510 to the negative pressure side can be mitigated.

  As described above, according to the liquid-filled vibration isolator 500 in the present embodiment, not only the hydraulic pressure is absorbed by the elastic deformation of the rubber film 509c itself of the bottom metal fitting 509, but also the bottom metal fitting 509 (the inner ring 509a and the rubber). The film 509c) follows the displacement of the anti-vibration substrate 3 (displaces in the same phase as the anti-vibration substrate 3), so that the hydraulic pressure can be released more effectively.

  As a result, it is possible to more effectively suppress an increase in the spring constant in the vertical direction (arrow Y direction) due to the influence of the hydraulic pressure, and accordingly, the spring in the horizontal direction (arrow X direction) and the vertical direction are correspondingly increased. The ratio of the constants can be increased. In addition to the elastic deformation of the rubber film 509c itself, the dynamic spring constant is reduced by releasing the hydraulic pressure more effectively by the displacement of the bottom metal fitting 509 (the inner ring 509a and the rubber film 509c). Accordingly, the ratio (static ratio) between the dynamic spring constant and the static spring constant can be further reduced accordingly.

  Next, a sixth embodiment will be described with reference to FIG. FIG. 23 is a cross-sectional view of the liquid-filled vibration isolator 600 in the sixth embodiment, and corresponds to the cross-sectional view of the liquid-filled vibration isolator 100 of FIG.

  In addition, while the arrow X shown in FIG. 23 shows the horizontal direction of the liquid filled type vibration isolator 600, the arrow Y shows the vertical direction of the liquid filled type vibration isolator 600, and these arrow X and arrow Y are These correspond to the left-right direction and the up-down direction of the automobile (vehicle), respectively. Further, in order to facilitate understanding, the nut N and the male screw 506a shown in FIG.

  In the fifth embodiment, the connecting member collar 506d and the bottom metal fitting 509 are configured as separate parts. However, in the sixth embodiment, the connecting member collar 506d is omitted and the inner ring 509a is connected to the connecting member collar. It is configured to have a shape extended in the axial center O direction (vertical direction in FIG. 23) by a length of 506d (vertical direction in FIG. 23). In addition, the same code | symbol is attached | subjected to the part same as said each embodiment, and the description is abbreviate | omitted.

  In the sixth embodiment, the liquid-filled vibration isolator 600 includes a first mounting bracket 601 and a second mounting bracket 602. The first mounting bracket 601 is a connecting member from the configuration of the first mounting bracket 501. The color 506d is omitted.

  As shown in FIG. 23, the liquid-filled vibration isolator 600 includes a bottom metal fitting 609. The bottom metal fitting 609 is a member for forming the liquid sealing chamber 510 between the bottom vibration-proof base 3 and is attached below the cylindrical metal fitting 8 (downward in FIG. 23).

  The bottom metal fitting 609 includes an inner ring 609a. The inner ring 609a of the bottom metal fitting 609 is connected to the length of the connecting member collar 506d (the vertical dimension in FIG. 23) from the length of the inner ring 509a (the vertical dimension in FIG. 23). It is configured in a cylindrical shape extended in the vertical direction (vertical direction in FIG. 23) by the dimension value).

  That is, the inner ring 609a can serve as an alternative part of the connecting member collar 506d. Therefore, the insertion of the connecting member collar 506d into the connecting member extension 506c is omitted, and instead the bottom fitting 609 is inserted into the connecting member extension 506c, and then the nut N is screwed into the male screw 506a, so that the bottom The bracket 609 and the first mounting bracket 601 can be integrated.

  Therefore, since the connecting member collar 506d is omitted, the product cost of the liquid filled type vibration damping device 600 can be reduced accordingly. In addition, since the number of parts constituting the liquid filled type vibration isolator 600 can be reduced, it is possible to reduce the product cost of the liquid filled type vibration isolator 600 without the need for assembly.

  In addition, while the arrow X shown in FIG. 24 shows the horizontal direction of the liquid filled type vibration isolator 600, the arrow Y shows the vertical direction of the liquid filled type vibration isolator 600, and these arrow X and arrow Y are These correspond to the left-right direction and the up-down direction of the automobile (vehicle), respectively. Further, for easy understanding, the nut N and the male screw 506a shown in FIG.

  In the fifth embodiment, the connecting member collar 506d and the lower stopper fitting 5 are configured as separate parts. However, in the seventh embodiment, the connecting member collar 506d is omitted and the lower portion of the lower stopper fitting 705 is omitted. An extension portion 705d is provided to stand from the edge of the hole formed at the center of the stopper base portion 5a toward the bottom metal fitting 509.

  In the seventh embodiment, the liquid-filled vibration isolator 700 includes a first mounting bracket 701, and the first mounting bracket 701 includes a lower stopper bracket 705 having an extension 705d.

  The extension portion 705d has a cylindrical shape that extends in the vertical direction (the vertical direction in FIG. 23) by the length of the connecting member collar 506d (the vertical dimension value in FIG. 23).

  That is, the extension 705d can serve as a substitute part for the connecting member collar 506d. Therefore, the insertion of the connecting member collar 506d into the connecting member extension 506c is omitted, and instead, the extension 705d of the extension 705 is inserted into the connecting member extension 506c, and then the nut N is screwed into the male screw 506a. Thus, the bottom metal fitting 609 and the first mounting metal fitting 601 can be integrated.

  Therefore, since the connecting member collar 506d is omitted, the product cost of the liquid filled type vibration damping device 700 can be reduced accordingly. In addition, since the number of parts constituting the liquid-filled vibration isolator 700 can be reduced, it is possible to reduce the product cost of the liquid-filled vibration-proof device 700 without the need for assembly.

  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 and size of each component) given in the above embodiments are merely examples, and other numerical values can naturally be adopted.

  In each of the embodiments described above, the case where the mounting bracket 7 is caulked by deforming the cylindrical bracket 8 has been described. However, the present invention is not limited to this, and a cylindrical caulking portion is erected from the inner edge of the mounting bracket 7. The cylindrical caulking portion 8a of the cylindrical metal fitting 8 is omitted, the caulking portion of the mounting metal fitting 7 is inserted inside the cylindrical abutting portion 8b of the cylindrical metal fitting 8, and then the caulking portion of the mounting metal fitting 7 is cylindrical. The cylindrical metal fitting 8 may be caulked by being deformed along the shape contact portion 8b.

  In this case, since the force generated by the lower stopper fitting 5 coming into contact with the vibration-proof base 3 does not act on the tubular fitting 8, the strength of the tubular fitting 8 can be lowered accordingly. Therefore, the plate thickness dimension T4 of the cylindrical metal fitting 8 can be reduced, and the liquid-filled vibration isolator 100 can be reduced in weight.

  In the third embodiment, the case where the groove portion 308f is recessed in the cylindrical metal fitting 8 has been described. However, the present invention is not necessarily limited to this, and is provided in the lower surface 7a-1 of the attachment caulking portion 7a of the attachment metal piece 7. You may do it.

  In this case, as in the first embodiment, a gap having a depth H2 is formed, and the gap communicates with the outside. Therefore, the inner circumferential surface of the mounting bracket 7 and the tubular shape are utilized using the gap. The press oil that has flowed out from the inner peripheral surface of the metal fitting 8 can be discharged to the outside. Therefore, it can prevent that the press oil which flowed out adheres to the internal peripheral surface of the attachment metal fitting 7, and the internal peripheral surface of the cylindrical metal fitting 8, and can improve the adhesive force of the adhesive in vulcanization adhesion.

  In the fourth embodiment, the case where the groove portion 408f is recessed in the cylindrical metal fitting 8 has been described. However, the present invention is not limited to this, and is provided in the lower surface 7a-1 of the attachment caulking portion 7a of the attachment metal fitting 7. You may do it.

  In this case, as in the first embodiment, a gap having a depth H2 is formed, and the gap communicates with the outside. Therefore, the inner circumferential surface of the mounting bracket 7 and the tubular shape are utilized using the gap. The press oil that has flowed out from the inner peripheral surface of the metal fitting 8 can be discharged to the outside. Therefore, it can prevent that the press oil which flowed out adheres to the internal peripheral surface of the attachment metal fitting 7, and the internal peripheral surface of the cylindrical metal fitting 8, and can improve the adhesive force of the adhesive in vulcanization adhesion.

  In the fifth embodiment, the case where the intermediate plate 511 is configured to have a cylindrical shape having the same axis O as that of the connecting member base 506b has been described. You may comprise as a circular arc-shaped board divided | segmented along the O direction, and may arrange | position in the state divided | segmented around the connection member base part 506b.

  In this case, by arranging the divided arc-shaped plate in the direction in which the spring constant is desired to be increased with respect to the connecting member base 506b, the spring constant is increased and the divided arc is not required in the direction in which the spring constant need not be increased. The arrangement of the shape plate can be omitted. Therefore, it is possible to reduce the weight while ensuring the necessary functions of the liquid filled type vibration damping device 500.

  In each of the above-described embodiments, the case has been described in which the lower end on the inner edge side of the mounting caulking portion 7a of the mounting bracket 7 is scraped linearly in a cross section including the axis O at a predetermined angle with respect to the axis O. However, the present invention is not limited to this, and may be cut into a curved shape that gently connects the lower surface 7a-1 and the inner surface 7a-3 in the cross section including the axis O.

  In this case, since the inner surface 7a-3 and the lower surface 7a-1 are connected smoothly, the flow of the press oil can be made smooth to improve the discharge efficiency of the press oil.

It is sectional drawing of the liquid filled type vibration isolator in 1st Embodiment of this invention. It is a figure which shows an upper stopper metal fitting and a connection member, (a) is a top view of an upper stopper metal fitting, (b) is sectional drawing of the upper stopper metal fitting in the IIb-IIb line | wire of Fig.2 (a). . It is a figure which shows a lower stopper metal fitting, (a) is a top view of a lower stopper metal fitting, (b) is sectional drawing of the lower stopper metal fitting in the IIIb-IIIb line | wire of Fig.3 (a). It is a top view of a mounting bracket. It is a figure which shows the cross section of a mounting bracket, (a) is sectional drawing of the mounting bracket in the Va-Va line of FIG. 4, (b) is sectional drawing of the mounting bracket in the Vb-Vb line of FIG. is there. It is a top view of a cylindrical metal fitting. It is a figure which shows the cross section of a cylindrical metal fitting, (a) is sectional drawing of the cylindrical metal fitting in the VIIa-VIIa line of FIG. 6, (b) is a cylindrical metal fitting in the VIIb-VIIb line of FIG. It is sectional drawing. It is sectional drawing of the cylindrical metal fitting in the VIII-VIII line of FIG. It is a figure which shows a bottom metal fitting, (a) is a top view of a bottom metal fitting, (b) is sectional drawing of the bottom metal fitting in the IXb-IXb line | wire of Fig.9 (a). (A) is a cross-sectional view of a liquid-sealed vibration isolator before vulcanization disposed in a vulcanization mold for vulcanizing and molding a vibration-proof substrate, and (b) is a liquid encapsulation after vulcanization. It is sectional drawing of a type | formula vibration isolator. It is the elements on larger scale of the attachment bracket which expanded the part shown by XI of FIG. It is a top view of the attachment metal fitting in 2nd Embodiment. It is a figure which shows the cross section of a mounting bracket, (a) is sectional drawing of the mounting bracket in the XIIIa-XIIIa line of FIG. 12, (b) is sectional drawing of the mounting bracket in the XIIIb-XIIIb line of FIG. is there. It is sectional drawing of the attachment metal fitting in the XIV-XIV line | wire of FIG. It is sectional drawing of the cylindrical metal fitting in 3rd Embodiment. It is sectional drawing of the cylindrical metal fitting in 4th Embodiment. It is sectional drawing of the liquid filled type vibration isolator in 5th Embodiment. It is a figure which shows an intermediate | middle board, (a) is a top view of an intermediate | middle board, (b) is sectional drawing of the intermediate | middle board in the XVIIIb-XVIIIb line | wire of Fig.18 (a). It is sectional drawing of a 1st attachment bracket. It is a figure which shows a connection member color, (a) is a top view of a connection member color, (b) is sectional drawing of the connection member color in the XXb-XXb line | wire of Fig.20 (a). It is a figure which shows a bottom metal fitting, (a) is a top view of a bottom metal fitting, (b) is sectional drawing of the bottom metal fitting in the XXIb-XXIb line | wire of FIG. 21 (a), (c) is It is sectional drawing of the bottom metal fitting in the XXIc-XXIc line | wire of Fig.21 (a). It is sectional drawing of the liquid filling type vibration isolator which showed the state which the 1st mounting bracket was displaced relatively to the 2nd mounting bracket side by vibration input. It is sectional drawing of the liquid filled type vibration isolator in 6th Embodiment. It is sectional drawing of the liquid filled type vibration isolator in 7th Embodiment. It is sectional drawing of the conventional liquid enclosure type vibration isolator.

Explanation of symbols

100, 500, 600, 700 Liquid-filled vibration isolator 1, 501, 601, 701 First mounting bracket (first mounting bracket)
2,502 Second mounting bracket (second mounting tool)
3,503 Anti-vibration base 4 Upper stopper fitting 4a Upper stopper base 4b Upper stopper connecting portion 4c Upper stopper contact portion 4c-1 Upper stopper notch 5,705 Lower stopper fitting (stirring member)
5a Lower stopper base portion 5b Lower stopper connection portion 5c Lower stopper contact portion 705d Extension portion 6,506 Connection member 6a, 506a Male thread 506b Connection member base portion 506c Connection member extension portion 506d Connection member collar 7,207 Mounting bracket (attachment member)
7a, 207a Mounting caulking portion (one end portion or the other end portion, a part of the connecting portion, the end portion of the mounting member)
7a-1 Lower surface (part of mating surface)
7a-2 Upper surface (part of the mating surface)
7b Mounting connection portion 7c Mounting flange portion 7d Mounting holes 8, 308, 408 Tubular fitting (tubular member)
8a Cylindrical caulking part (a part of one end part or a part of the other end part, a part of a coupling part, a connection part and a clamping part, a part of an end part of a cylindrical member)
8a-1 Upper upper side (part of mating surface, mating surface of clamping part)
8b, 308b Cylindrical contact part (part of one end part or part of the other end part, part of connection part, contact part, part of end part of cylindrical member)
8b-1 Upper surface (part of the mating surface, mating surface of the contact portion)
8c Cylindrical portion 8d Cylindrical lower caulking portion 8e Cylindrical enlarged diameter portions 8f, 207f, 308f, 408f Groove (groove)
9,609 Bottom bracket (closing member)
509 Bottom bracket (diaphragm)
509a, 609a Inner ring (inner member)
509b Outer ring (outer member)
509c Rubber film (film member)
509d Rib 10, 510 Liquid sealing chamber 511 Intermediate plate T1, T2, T3, T4 Thickness D1, D2, D4, D7, D8, D10, D11 Outer diameter D4 Outer diameter of lower stopper fitting (outer diameter of stirring member)
D3, D5, D6, D9, D12, D13 Inner diameter H1 Height H2, H Depth W1, W3 Spacing W2, W4 Width N Nut O Axle

Claims (4)

A first mounting tool, a cylindrical second mounting tool, a vibration isolating base that connects the second mounting tool and the first mounting tool and is made of a rubber-like elastic body, and is attached to the second mounting tool A liquid-filled vibration isolator comprising a diaphragm that forms a liquid-filled chamber with the vibration-proof substrate and a stirring member that is disposed in the liquid-filled chamber and connected to the first fixture In
The diaphragm includes an annular outer member attached to the second fixture, a circular inner member positioned on the inner peripheral side of the outer member, an outer peripheral side of the inner member, and an inner peripheral side of the outer member. A film-like member connected to and formed into a film shape from a rubber-like elastic body,
The inner member is connected to the first fixture, and when the first fixture is displaced in accordance with vibration input, the inner member is configured to be displaced in the same phase as the first fixture. A liquid-filled vibration proof device. The second attachment includes an attachment member attached to the vibration generator side or the vehicle body side, and a tubular member connected to the attachment member and attached to the sealing member.
The connection between the attachment member and the tubular member is performed by folding back one end of the attachment member or the tubular member and sandwiching the other end.
A connecting portion where the mounting member and the tubular member are connected is located on the liquid sealing chamber side, and an inner diameter of the connecting portion is configured to be smaller than an outer diameter of the stirring member, It is configured so that a stopper action can be obtained by contacting the stirring member,
The mounting member or the cylindrical member includes a plurality of grooves that are recessed in at least one of the mating surfaces of the one end and the other end, and the grooves are formed on the one surface. The liquid-filled type vibration damping device according to claim 1, wherein the liquid-filled type vibration damping device is formed at a position communicating with the outside while being scattered. The other end is extended toward the liquid enclosure chamber side,
The one end is extended toward the liquid sealing chamber and is in contact with the other end, a connection connected to the contact, and the connection And a holding portion that contacts the other end portion from the side opposite to the contact portion and sandwiches the other end portion with the contact portion when folded from the connection portion. Prepared,
The mating surfaces of the other end portion and the clamping portion are both configured as flat surfaces, and at least one of the mating surfaces of the other end portion and the abutting portion has the above-described surface. The groove is recessed,
The groove is formed at a position that extends radially outward from the liquid sealing chamber side and communicates with the outside the space between the other end and the connection portion. The liquid-filled type vibration isolator according to claim 2. The other end is constituted by the end of the mounting member, and the one end is constituted by the end of the tubular member,
The connection between the mounting member and the cylindrical member is performed by folding back the end of the cylindrical member and sandwiching the end of the mounting member,
The cylindrical member is made of a material having a plate thickness thinner than that of the mounting member,
The liquid-filled vibration isolator according to claim 3, wherein the stirring member is located closer to the closing member than the connecting portion, and the stirring member is in contact with the contact portion.

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