JP6148963B2 - Vibration isolator - Google Patents

Description

  The present invention relates to a vibration isolator that is used as, for example, an engine mount, a body mount, a subframe mount, and the like for an automobile.

  Conventionally, a vibration isolator as disclosed in Japanese Patent No. 4054079 (Patent Document 1) is known as a type of a vibration isolating coupling body or a vibration isolating support body interposed between members constituting a vibration transmission system. . The vibration isolator has a structure in which a first attachment member and a second attachment member are elastically connected by a main rubber elastic body.

  Incidentally, a bracket is attached to the first attachment member of the vibration isolator. In the vibration isolator described in Patent Document 1, the first mounting member and the bracket are overlapped vertically and fixed by bolts.

  However, in the structure of Patent Document 1, since bolts are required to fix the first mounting member and the bracket, the number of parts increases, the structure becomes complicated, and the first mounting is problematic. In order to firmly fix the member and the bracket, it is necessary to use a relatively large bolt, and an increase in weight tends to be a problem.

  Therefore, in JP2013-108522A (Patent Document 2), the plate portion (25) of the first mounting member (second mounting bracket 5 in Patent Document 2) is bent along the surface of the bracket. A structure has been proposed in which brackets are connected so as to be held by a first mounting member.

  However, according to the structure of Patent Document 2, a bolt for fixing the first mounting member and the bracket becomes unnecessary, and the plate portion of the first mounting member is superimposed on the bracket surface. There is a problem that it is difficult to avoid an increase in size at the connecting portion between the mounting member and the bracket. In addition, since the large plate portion that can be bent so as to hold the outside of the bracket is provided, the size of the first mounting member itself may be problematic.

Japanese Patent No. 4054079 JP 2013-108522 A

  The present invention has been made in the background of the above-described circumstances, and the problem to be solved is that the first mounting member and the bracket are fixed in a compact manner with a simple structure with a small number of parts and preventing an increase in size. Another object is to provide a vibration isolator having a novel structure.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  That is, the first aspect of the present invention is the vibration isolator in which the first mounting member and the second mounting member are connected by the main rubber elastic body, and the bracket is fixed to the first mounting member. The first mounting member has a structure in which a block-like base portion to which the main rubber elastic body is fixed and a separate caulking piece protruding from the base portion are fixed to each other, An insertion hole is formed in the bracket, and the base portion of the first mounting member and the bracket are overlapped, and the caulking piece of the first mounting member is inserted into the insertion hole of the bracket. In addition, the caulking piece has a distal end portion bent and fixed to the opening edge portion of the insertion hole by being overlapped from the side opposite to the base portion.

  According to the vibration isolator configured as described above according to the first aspect, since the bracket is sandwiched and fixed between the base portion of the first mounting member and the caulking piece, the first mounting member and Separate parts such as bolts for fixing the bracket are unnecessary, and the first mounting member and the bracket can be fixed with a simple structure with a small number of parts.

  In addition, since the caulking piece is inserted into the insertion hole that penetrates the bracket, an increase in the size of the connecting portion is avoided as compared with a structure in which the first mounting member is fixed so as to hold the outside of the bracket. The crimping piece can also be made relatively small, and the size of the first mounting member itself can be avoided.

  Moreover, the 1st attachment member is comprised by the base and the crimping piece which were formed in the mutually separate body adhering. Therefore, for example, it is possible to achieve a high degree of compatibility between a lightweight base portion that is easy to obtain an adhesive force to the main rubber elastic body, and a caulking piece that can realize caulking and fixing with a thin wall and sufficient strength. In addition, since the base portion has a block shape, sufficient load resistance can be easily realized, and a large fixing area between the base portion and the caulking piece can be secured.

  According to a second aspect of the present invention, in the vibration isolator described in the first aspect, the first mounting member is provided with a plurality of the caulking pieces, and at least two of the caulking pieces are different from each other. It is bent in the direction.

  According to the second aspect, the first attachment member and the bracket are fixed at a plurality of locations, and the first attachment member and the bracket are more firmly fixed by bending the caulking pieces in different directions.

  A third aspect of the present invention is the vibration isolator described in the first or second aspect, wherein the caulking piece is covered with a covering rubber layer.

  According to the 3rd aspect, compared with the case where a crimping piece and a bracket are directly piled up, erosion by a dissimilar metal contact corrosion etc. is avoided and durability can be improved.

  According to a fourth aspect of the present invention, in the vibration isolator described in any one of the first to third aspects, the base portion is formed of a synthetic resin and the caulking piece is formed of a metal. It is what.

  According to the fourth aspect, the base portion is made of synthetic resin, which advantageously achieves weight reduction and large shape freedom, while the caulking piece is made of metal, so that the bracket can be fixed by bending. In addition, it is possible to easily obtain a caulking piece having a predetermined shape with a press fitting or the like. Moreover, the base and the caulking piece can be easily fixed by inserting the caulking piece when the base is molded.

  According to a fifth aspect of the present invention, in the vibration isolator described in any one of the first to fourth aspects, the first mounting member includes a separate cylindrical metal fitting protruding from the base. In addition, the projecting tip portion of the cylindrical metal fitting is divided in the circumferential direction to form a plurality of the caulking pieces on the circumference, and the plurality of caulking pieces are inserted through the one insertion hole, The front end portions of the caulking pieces are bent to the outer peripheral side and are superimposed on the opening peripheral edge portion of the insertion hole from the side opposite to the base portion.

  According to the fifth aspect, since the plurality of caulking pieces are inserted and fixed in one insertion hole, the first mounting member and the bracket can be firmly fixed even with a small number of insertion holes. In addition, since the protruding tip portion of the cylindrical fitting is divided in the circumferential direction to form a plurality of caulking pieces, the tip end portions of the plurality of caulking pieces are bent toward the outer circumference side in different directions, and the first mounting The fixing strength between the member and the bracket can be obtained more advantageously.

  According to a sixth aspect of the present invention, in the vibration isolator described in the fifth aspect, a fluid chamber in which a part of the wall portion is configured by the main rubber elastic body is formed, and the fluid chamber is not compressed. The first mounting member is formed with an injection hole penetrating the base, and one end of the injection hole is opened in the wall portion of the fluid chamber. The other end of the hole is open to the inner peripheral side of the tubular fitting, while the injection hole is sealed fluid-tight with a plug.

  According to the sixth aspect, since the injection hole is opened in the center hole of the cylindrical metal fitting, the injection hole can be easily formed, and the incompressible fluid can be injected into the fluid chamber through the injection hole. It is also possible to inject an incompressible fluid into the fluid chamber through an injection hole opened on the inner peripheral side of the cylindrical fitting after the bracket is attached to the first attachment member.

  According to a seventh aspect of the present invention, in the vibration isolator described in any one of the first to fourth aspects, the caulking piece of the first mounting member is covered with a covering rubber layer, The insertion hole of the bracket has a slit shape, and the insertion hole is fluid-tightly sealed by inserting and fixing the caulking piece into the insertion hole.

  According to the seventh aspect, since the insertion hole is sealed by the caulking piece covered with the covering rubber layer, it is possible to prevent rainwater and the like from entering and collecting in the insertion hole. Also, even when multiple caulking pieces and insertion holes are provided, the caulking pieces are inserted into one insertion hole, so the placement of the caulking pieces and the insertion holes and the bending direction of the caulking pieces can be set with a large degree of freedom. can do.

  According to an eighth aspect of the present invention, in the vibration isolator described in the seventh aspect, the first mounting member is formed with a plurality of the caulking pieces, and the bracket has a slit shape. A plurality of insertion holes extend in parallel to each other, and the caulking pieces are inserted through the insertion holes, respectively.

  According to the eighth aspect, since the plurality of insertion holes having a slit shape are arranged apart in the width direction, the first mounting member and the bracket can be fixed even if the bending direction of the caulking piece is the same. Power can be obtained efficiently.

  According to the present invention, the first mounting member is formed by adhering the base portion and the caulking piece separately formed, and the first mounting member and the bracket are overlapped to form the caulking piece of the first mounting member. Is inserted into the insertion hole of the bracket, and the tip end portion of the caulking piece is bent and fixed to the bracket from the side opposite to the base. Accordingly, the first mounting member and the bracket can be fixed with a simple, lightweight and compact structure with a small number of components, and optimum materials and shapes can be set for the base and the caulking pieces, respectively.

The perspective view which shows the engine mount as 1st embodiment of this invention. FIG. 2 is a longitudinal sectional view of the engine mount shown in FIG. 1. The disassembled perspective view which shows the 1st attachment member of the engine mount shown in FIG. 1, and the attachment before a 1st bracket. FIG. 4 is an exploded perspective view of the engine mount shown in FIG. 3, showing a state in which a caulking piece of a first mounting member is inserted into an insertion hole of a first bracket. The perspective view which shows the engine mount as 2nd embodiment of this invention. FIG. 6 is a longitudinal sectional view of the engine mount shown in FIG. 5. The disassembled perspective view which shows the 1st attachment member of the engine mount shown in FIG. 5, and the 1st bracket before attachment. FIG. 8 is an exploded perspective view of the engine mount shown in FIG. 7, showing a state in which a caulking piece of the first mounting member is inserted into an insertion hole of the first bracket.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show an automotive engine mount 10 as a first embodiment of a vibration isolator having a structure according to the present invention. The engine mount 10 includes a mount main body 11, and the mount main body 11 has a structure in which a first mounting member 12 and a second mounting member 14 are elastically connected by a main rubber elastic body 16. In the following description, the vertical direction means, in principle, the vertical direction in FIG. 2 that is the mount central axis direction.

  More specifically, the first mounting member 12 has a structure in which the base portion 18 and the cylindrical fitting 20 are fixed. The base portion 18 is formed of a hard synthetic resin, has a block shape extending in a vertical direction with a substantially circular cross section, and has a tapered shape in which a lower portion gradually becomes smaller in diameter downward. Further, the base portion 18 is formed with an injection hole 22 extending vertically on the central axis, and both ends open on the upper surface and the lower surface of the base portion 18 respectively. Furthermore, a pair of concave grooves 24 and 24 that open to the outer peripheral surface are formed in the upper portion of the base portion 18 and are disposed to face each other in the radial direction.

  Moreover, the cylindrical metal fitting 20 is formed separately from the base 18 by a metal such as iron, and has a substantially bottomed cylindrical shape. Furthermore, a through-hole 26 is formed in the bottom wall portion of the cylindrical metal fitting 20 so as to penetrate the central portion in the radial direction. Furthermore, as shown in FIG. 3, the upper part of the cylindrical metal fitting 20 is divided in the circumferential direction by a plurality of cuts 28 reaching the upper end, and a plurality of caulking pieces 30 are arranged on the circumference with the cuts 28 interposed therebetween. Yes. In the present embodiment, four caulking pieces 30 having substantially the same shape are evenly arranged on the circumference. In addition, the cylindrical metal fitting 20 can be easily obtained by, for example, performing press processing and cutting processing on an iron plate.

  The lower part of the tubular metal fitting 20 is fixed to the base 18, and the caulking pieces 30 constituting the upper part of the tubular metal fitting 20 protrude upward from the radial intermediate portion of the base 18. The base 18 and the cylindrical metal fitting 20 may be fixed by means such as adhesion after being formed separately. For example, when the base 18 is molded, the cylindrical metal fitting 20 is set in the cavity of the molding die, and the cylindrical By forming the base 18 with the metal fitting 20 inserted, the base 18 and the cylindrical metal fitting 20 can be fixed simultaneously with the formation of the base 18. The through hole 26 of the cylindrical metal fitting 20 is aligned with the injection hole 22 of the base 18 so that the injection hole 22 is formed continuously up and down through the through hole 26. Further, the concave groove 24 is formed with a depth that does not reach the cylindrical fitting 20.

  The second mounting member 14 is a high-rigidity member formed of a metal such as iron and has a large-diameter, generally cylindrical shape. Further, a flange portion 32 protruding to the outer peripheral side is formed at the upper end portion of the second mounting member 14, and an inner flange portion 34 protruding toward the inner peripheral side is integrally formed at the lower end portion.

  And the 1st attachment member 12 is arrange | positioned upwards on the substantially same central axis as the 2nd attachment member 14, and the upper end part of the base 18 of the 1st attachment member 12 and the 2nd attachment member 14 is a main body. The rubber elastic body 16 is elastically connected. The main rubber elastic body 16 has a thick-walled, large-diameter, generally frustoconical shape. The end portion on the small-diameter side is vulcanized and bonded to the base 18, and the outer peripheral surface of the end portion on the large-diameter side is the first. Vulcanized and bonded to the upper end portion of the second mounting member 14. The main rubber elastic body 16 is formed as an integrally vulcanized molded product including the first mounting member 12 and the second mounting member 14.

  Further, the main rubber elastic body 16 is formed with a large-diameter recess 36 that opens to the end surface on the large-diameter side. The large-diameter recess 36 has a reverse mortar shape that expands downward. Further, the injection hole 22 of the first mounting member 12 is opened in the upper bottom wall portion of the large-diameter recess 36, and the inner peripheral surface of the injection hole 22 is integrally formed with the main rubber elastic body 16. The rubber layer 38 is covered. Furthermore, the caulking piece 30 of the first mounting member 12 is entirely covered with a covering rubber layer 40 formed integrally with the main rubber elastic body 16.

  A flexible film 42 is attached to the second attachment member 14. The flexible film 42 is a rubber film having a thin, substantially disk shape, and has an upper and lower slack. The flexible membrane 42 is sandwiched between the inner flange portion 34 of the second mounting member 14 and a partition member 48 described later, so that the outer peripheral end of the flexible membrane 42 is fluid to the second mounting member 14. Closely attached.

  Further, a fluid chamber 44 in which a part of the wall portion is formed of the main rubber elastic body 16 is formed between the opposing surfaces of the main rubber elastic body 16 and the flexible film 42. In the fluid chamber 44, the lower end of the injection hole 22 is opened in the wall portion, and the upper end is communicated to the outside through the injection hole 22 opened on the inner peripheral side of the cylindrical metal fitting 20. The incompressible fluid is injected into the fluid chamber 44 through the injection hole 22, and the spherical plug 46 is fitted into the injection hole 22 after the injection of the incompressible fluid. The fluid chamber 44 is sealed with a tightly sealed incompressible fluid.

  The incompressible fluid sealed in the fluid chamber 44 is not particularly limited, but for example, water, ethylene glycol, alkylene glycol, polyalkylene glycol, silicone oil, or a mixture thereof is preferable. Used for. Furthermore, a low-viscosity fluid having a viscosity of 0.1 Pa · s or less is desirable in order to advantageously obtain a vibration isolation effect based on the fluid flow action.

  A partition member 48 is disposed in the fluid chamber 44. The partition member 48 has a thick, generally disc shape as a whole, and includes a lid member 50 and a partition member main body 52. The lid member 50 has a thin, substantially disk shape, and is a hard member made of metal or synthetic resin. Further, the lid member 50 is formed with a plurality of upper through holes 54 penetrating in the thickness direction.

  The partition member main body 52 has a thick, substantially disk shape, and is a hard member formed of metal or synthetic resin. Further, a housing recess 56 that is substantially circular in an axial view is formed at the center portion in the radial direction of the partition member body 52 so as to open upward, and the bottom wall portion of the housing recess 56 has a thick wall. A plurality of lower through holes 58 penetrating in the vertical direction are formed. Furthermore, a circumferential groove 60 is formed in the outer peripheral portion of the partition member main body 52 so as to open to the upper surface and extend in the circumferential direction by a predetermined length.

  A lid member 50 is superimposed on the upper surface of the partition member body 52, and a movable film 62 is disposed between the lid member 50 and the partition member body 52. The movable film 62 is a substantially disc-shaped rubber elastic body, and has a central portion and an outer peripheral end portion that are thick and project upward. The movable film 62 is disposed in the housing recess 56 of the partition member main body 52, and the thickened central portion and outer peripheral end portion are vertically moved between the bottom wall portion of the housing recess 56 and the lid member 50. Is sandwiched between.

  And the partition member 48 is arrange | positioned so that it may spread in the direction orthogonal to an axis within the fluid chamber 44, and when an outer peripheral edge part is pinched | interposed between the upper end part of the 2nd attachment member 14, and the inner flange part 34, it is. The second mounting member 14 is supported. The inner flange portion 34 is formed in a cylindrical shape projecting downward, and the partition member 48 and the flexible film 42 are inserted into the inner peripheral side of the second mounting member 14 from the lower side, and then on the inner peripheral side. By being bent, it is superimposed on the lower surfaces of the partition member 48 and the flexible membrane 42.

  By arranging the partition member 48 in this way, the fluid chamber 44 is vertically divided into two with the partition member 48 interposed therebetween. That is, above the partition member 48, a part of the wall portion is formed of the main rubber elastic body 16, and a pressure receiving chamber 64 is formed in which internal pressure fluctuations are generated when vibration is input. In this case, a part of the wall portion is formed of the flexible film 42 to form an equilibrium chamber 66 in which volume change is allowed.

  Further, the upper opening of the circumferential groove 60 is covered with the lid member 50 to form a tunnel-like flow path, and both ends of the flow path are communicated with one of the pressure receiving chamber 64 and the equilibrium chamber 66. . Thus, an orifice passage 68 that connects the pressure receiving chamber 64 and the equilibrium chamber 66 to each other is formed using the circumferential groove 60. The orifice passage 68 has a tuning frequency, which is the resonance frequency of the flowing fluid, appropriately setting the ratio (A / L) of the passage cross-sectional area (A) to the passage length (L) in consideration of the wall spring rigidity of the fluid chamber 44. In this embodiment, tuning is performed at a low frequency of about 10 Hz corresponding to engine shake.

  In a state where the engine mount 10 to be described later is mounted on the vehicle, when a low frequency large amplitude vibration is input and a relative pressure difference is generated between the pressure receiving chamber 64 and the equilibrium chamber 66, both chambers 64, The fluid flow through the orifice passage 68 is generated between the 66 and the vibration isolation effect based on the fluid action such as the resonance action of the fluid is exhibited.

  Further, the upper surface of the movable film 62 is subjected to the hydraulic pressure of the pressure receiving chamber 64 through the upper through hole 54, and the lower surface of the movable film 62 is subjected to the hydraulic pressure of the equilibrium chamber 66 through the lower through hole 58. Therefore, the movable film 62 is elastically deformed in the thickness direction by the hydraulic pressure difference between the pressure receiving chamber 64 and the equilibrium chamber 66. Accordingly, when the engine mount 10 to be described later is mounted on the vehicle, when the medium to high frequency small amplitude vibration is input, the movable film 62 is elastically deformed in the thickness direction in the resonance state, so that the vibration insulation by the low dynamic spring is achieved. The effect has come to be demonstrated.

  In the mount body 11 having such a structure, a first bracket 70 as a bracket is attached to the first attachment member 12 and a second bracket 72 is attached to the second attachment member 14. ing.

  The first bracket 70 is a high-rigidity member formed of a metal such as iron or aluminum alloy, and includes a connecting plate portion 74 attached to the first attachment member 12 and an attachment portion 76 attached to a power unit (not shown). And integrated. The connecting plate portion 74 is formed with an insertion hole 78 penetrating in the thickness direction with a substantially constant circular cross section. Further, the attachment portion 76 is formed with a plurality of bolt holes 80 penetrating vertically.

  The second bracket 72 is a highly rigid member similar to the first bracket 70, and protrudes from the fitting cylinder part 82 and a substantially cylindrical fitting cylinder part 82 attached to the second attachment member 14. And a set of attachment portions 84, 84 attached to a vehicle body (not shown). Note that a bolt hole 86 is formed in each of the pair of mounting portions 84 and 84.

  The first bracket 70 is fixed to the first mounting member 12, and the fitting tube portion 82 of the second bracket 72 is fixed to the second mounting member 14. The fitting cylinder portion 82 of the second bracket 72 has an upper end surface superimposed on the flange portion 32 of the second mounting member 14 from below and a lower end portion protruding to the inner peripheral side. Are superimposed on the inner flange portion 34 of the mounting member 14 from below.

  Here, the first bracket 70 is fixed to the first mounting member 12 by the caulking piece 30. That is, as shown in FIG. 4, the connecting plate portion 74 of the first bracket 70 is superimposed on the base portion 18 of the first mounting member 12 from above, and the first insertion hole 78 of the first bracket 70 is inserted into the first insertion hole 78. The caulking piece 30 of the attachment member 12 is inserted. In the present embodiment, four caulking pieces 30, 30, 30, 30 are inserted through one insertion hole 78.

  And the front-end | tip part of each crimping piece 30 which protruded upwards from the insertion hole 78 is each bent to the outer peripheral side, and overlaps from the opposite side to the base 18 at the opening peripheral part of the insertion hole 78, as shown in FIG. Has been. Thereby, the connecting plate portion 74 of the first bracket 70 is supported by being sandwiched between the base portion 18 of the first mounting member 12 and the caulking piece 30 at the opening peripheral edge portion of the insertion hole 78. The first mounting member 12 and the first bracket 70 are fixed to each other. In the present embodiment, the tip portions of the four caulking pieces 30, 30, 30, 30 are bent in different directions and spread radially.

  The caulking piece 30 is bent in a state where, for example, a jig 88 is inserted into the concave grooves 24 and 24 of the base portion 18 and the base portion 18 is vertically positioned as shown by a two-dot chain line in FIG. This is realized by pressing the processing means 89 against the caulking piece 30 from above and bending the caulking piece 30 outward.

  The mounting portion 76 of the first bracket 70 is attached to the power unit by a bolt (not shown) inserted through the bolt hole 80, and the mounting portions 84, 84 of the second bracket 72 are inserted through the bolt hole 86 (not shown). The engine mount 10 is attached to the vehicle by being attached to the vehicle body by bolts.

  According to the engine mount 10 having such a structure, the first mounting member 12 and the first bracket 70 are fixed by the caulking piece 30, and a separate fixing member (for example, a bolt or the like) is not required. It can be fixed with a simple structure with few parts. In addition, by adopting a structure in which the metal bolt is omitted, weight reduction and size reduction can be advantageously realized.

  In addition, since the first mounting member 12 has a structure in which the base 18 and the caulking piece 30 which are separate from each other are fixed, the characteristics required for the base 18 and the characteristics required for the caulking piece 30 are respectively provided. Highly realizable. In the present embodiment, the base 18 is made of synthetic resin to reduce the weight, and the caulking piece 30 is made of metal, so that the first bracket 70 can be fixed by bending. Yes.

  Further, since the base portion 18 is formed in a block shape, a large fixing area between the base portion 18 and the cylindrical metal fitting 20 is ensured, and sufficient fixing strength is ensured. Further, the block-shaped base 18 and the substantially cylindrical second mounting member 14 are elastically connected by a substantially truncated cone-shaped main rubber elastic body 16, so that the pressure receiving chamber 64 of the pressure receiving chamber 64 can be input at the time of axial vibration input. The internal pressure fluctuation can be caused efficiently.

  Further, the surface of the caulking piece 30 is covered with the covering rubber layer 40, and direct contact between the caulking piece 30 and the first bracket 70 is avoided. Therefore, corrosion and surface damage due to contact with different metals are avoided, and durability is ensured.

  A plurality of caulking pieces 30 are inserted into one insertion hole 78 and bent to the outer peripheral side to be caulked and fixed. Thereby, even if the number of the insertion holes 78 is small, the bending directions of the caulking pieces 30 can be made different from each other, and the first mounting member 12 and the first bracket 70 can be firmly fixed.

  Furthermore, in this embodiment, the engine mount 10 is a fluid-filled vibration isolator, so that the incompressible fluid is injected into the fluid chamber 44 through the injection hole 22 that opens to the inner peripheral side of the cylindrical fitting 20. It has become. As a result, the hole 22 for injecting the rear liquid into the fluid chamber 44 can be formed by skillfully utilizing the central hole of the caulking piece 30 that has a cylindrical shape.

  5 and 6 show an engine mount 90 as a second embodiment of the present invention. The engine mount 90 includes a mount main body 91, and the mount main body 91 has a structure in which a first attachment member 92 and a second attachment member 94 are elastically connected by the main rubber elastic body 16. In addition, in the following description, about the member and site | part substantially the same as 1st embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol in a figure.

  More specifically, the first attachment member 92 has a structure in which a base portion 96 and a caulking fitting 98 which are separated from each other are fixed.

  The base portion 96 is a hard member formed of a synthetic resin, has a substantially circular cross section and a block shape extending in the axial direction, and has a tapered shape in which the lower portion gradually decreases in diameter downward. .

  The caulking metal fitting 98 is made of a metal such as iron and has a substantially U-shaped cross section as shown in FIG. 6, and both ends extending upward are a pair of caulking pieces 100. . The pair of caulking pieces 100, 100 have a substantially flat plate shape, and are opposed to each other in the thickness direction and spread in substantially parallel. The caulking metal fitting 98 of the present embodiment can be obtained, for example, by curving a rectangular flat steel plate into a substantially U-shaped groove shape by press working. Before the first bracket 102, which will be described later, is fixed, as shown in FIG. 7, the caulking fitting 98 has a substantially flat plate shape that protrudes upward.

  The lower portion of the caulking metal fitting 98 is fixed to the base portion 96 in an embedded state. Further, the caulking pieces 100, 100 constituting the upper part of the caulking metal fitting 98 protrude upward from the base portion 96. In addition, it is desirable that the caulking metal fitting 98 is inserted at the time of forming the base portion 96 and fixed at the same time as the forming of the base portion 96, as in the first embodiment.

  The second mounting member 94 is a high-rigidity member formed of a metal such as iron or aluminum alloy, has a thin-walled large-diameter substantially cylindrical shape, and has an upper end portion on the inner peripheral side. A fixing portion having a convex groove shape and a flange portion 32 protruding from the upper end of the fixing portion to the outer peripheral side are provided.

  The first mounting member 92 and the second mounting member 94 are arranged vertically on substantially the same central axis and are elastically connected to each other by the main rubber elastic body 16. Further, the caulking piece 100 is covered with a covering rubber layer 40 integrally formed with the main rubber elastic body 16. The covering rubber layer 40 spreads so as to cover the outer peripheral surface of the base portion 96 at a portion where the grooves 24 and 24 are removed, and is integrally connected to the main rubber elastic body 16.

  A first bracket 102 and a second bracket 72 as brackets are attached to the mount body 91 having such a structure.

  The connecting plate portion 74 of the first bracket 102 is formed with a pair of slits 106 and 106 as insertion holes. The slit 106 is a hole having an elongated substantially rectangular cross section, and penetrates the connecting plate portion 74 in the thickness direction. A pair of slits 106, 106 are provided at positions facing each other with a predetermined distance in the width direction, and extend in parallel to each other.

  The first bracket 102 has the connecting plate portion 74 superimposed on the first mounting member 92 from above, and a pair of caulking pieces 100, 100 of the first mounting member 92 as shown in FIG. Is inserted through one of the pair of slits 106, 106 of the connecting plate portion 74. Further, the protruding tip portion of the caulking piece 100 protruding upward from the connecting plate portion 74 through the slit 106 is bent in the thickness direction as shown in FIGS. 5 and 6, and the connecting plate portion 74 is opposite to the base portion 96. Superposed from the side. As a result, the connecting plate portion 74 of the first bracket 102 is sandwiched between the base portion 96 of the first mounting member 92 and the caulking piece 100 so that the first mounting member 92 and the first bracket 102 are mutually connected. It is fixed. Also in this embodiment, when the crimping piece 100 is bent, the base 96 can be positioned by inserting the jig 88 into the pair of concave grooves 24 and 24 as in the first embodiment.

  Further, the caulking piece 100 is inserted and fixed to the slit 106 in a state where the covering rubber layer 40 deposited on the surface is compressed, and the gap between the caulking piece 100 and the inner peripheral surface of the slit 106 is covered rubber. It is fluid tightly sealed by layer 40. Further, the caulking piece 100 is positioned in the slit 106 by interposing the compressed covering rubber layer 40 between the caulking piece 100 and the slit 106.

  In the present embodiment, the pair of caulking pieces 100, 100 are bent in the opposite directions and outward in the opposite direction, so that the fixing strength can be advantageously obtained. However, the pair of caulking pieces 100, 100 may be bent in the same direction.

  According to the engine mount 90 having the structure according to this embodiment, since the caulking pieces 100 are inserted and fixed to the respective slits 106, the plural caulking pieces 100 and the slits 106 are respectively placed at arbitrary positions. Can be provided. Therefore, for example, the connection strength between the first mounting member 92 and the first bracket 102 can be advantageously obtained by inserting and fixing the pair of caulking pieces 100, 100 into the slits 106, 106 at positions separated from each other. Can do.

  In particular, since the pair of caulking pieces 100 and 100 and the pair of slits 106 and 106 are provided so as to be spaced apart from each other in the width direction and extend in parallel with each other, the first mounting member 92 and the first bracket 102 The connection strength can be obtained more advantageously.

  In addition, since the gap between the caulking piece 100 and the slit 106 is fluid-tightly sealed with the covering rubber layer 40, the mount main body 91 can be mounted even when rainwater or the like falls from above the first bracket 102. Protected to avoid degradation of durability. Further, since the space between the caulking piece 100 and the slit 106 is filled with the covering rubber layer 40, the first mounting member 92 and the first bracket 102 are positioned more advantageously, and the mount body 91 of the first bracket 102. Shaking against is avoided.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the vibration isolator according to the present invention, the second bracket is not an essential component.

  In the first embodiment, a plurality of insertion holes may be provided in the first bracket, and a plurality of caulking pieces may be inserted and fixed in the insertion holes.

  Furthermore, in the fluid-filled vibration isolator as in the first embodiment, an injection hole for post-injecting the incompressible fluid into the fluid chamber may be provided. For example, a partition member for the second mounting member In addition, by assembling the flexible membrane in a water tank filled with an incompressible fluid, the incompressible fluid can be sealed in the fluid chamber without providing an injection hole.

  Furthermore, in the vibration isolator of the first embodiment, for example, when rainwater or the like falls on the tubular fitting when mounted on the vehicle, a cap that forms a drain hole in the tubular fitting or closes the opening of the tubular fitting. It is also possible to prevent rainwater from accumulating in the central hole of the tubular metal fitting by attaching a ring.

  Moreover, in 2nd embodiment, the number and arrangement | positioning of a slit and a crimping piece are not specifically limited, It can change suitably. In addition, the fixing structure shown in the first embodiment for inserting and fixing the caulking piece obtained by dividing the distal end portion of the cylindrical metal fitting into the insertion hole, and the caulking piece covered with the covering rubber layer into the slit-like insertion hole It is also possible to employ the fixing structure shown in the second embodiment that is inserted into and fixed to.

  The present invention can be applied not only to engine mounts but also to body mounts, subframe mounts, differential mounts, and the like. Further, the scope of application of the present invention is not limited to a fluid-filled vibration isolator for automobiles, and is suitably applied to, for example, a fluid-filled vibration isolator used for motorcycles, railway vehicles, industrial vehicles, and the like. Is done.

10, 90: engine mount (vibration isolation device), 12, 92: first mounting member, 14, 94: second mounting member, 16: main rubber elastic body, 18, 96: base, 20: tube fitting, 22: injection hole, 30, 100: caulking piece, 40: covering rubber layer, 44: fluid chamber, 46: plug, 70, 102: first bracket (bracket), 78: insertion hole, 106: slit (insertion) Hole)

Claims (8)

In the vibration isolator in which the first attachment member and the second attachment member are connected by the main rubber elastic body, and the bracket is fixed to the first attachment member.
The first mounting member has a structure in which a block-like base portion to which the main rubber elastic body is fixed and a separate caulking piece protruding from the base portion are fixed to each other,
An insertion hole is formed in the bracket,
The base of the first mounting member and the bracket are overlapped, the caulking piece of the first mounting member is inserted into the insertion hole of the bracket, and the distal end portion of the caulking piece is bent. An anti-vibration device characterized by being fixed by being superimposed on the opening edge of the insertion hole from the side opposite to the base.   The vibration isolator according to claim 1, wherein the first mounting member is provided with a plurality of the caulking pieces, and at least two of the caulking pieces are bent in different directions.   The vibration isolator according to claim 1 or 2, wherein the caulking piece is covered with a covering rubber layer.   The vibration isolator according to any one of claims 1 to 3, wherein the base is made of a synthetic resin and the caulking piece is made of metal.   The first mounting member includes a separate cylindrical metal fitting protruding from the base, and a protruding tip portion of the cylindrical metal fitting is divided in the circumferential direction to form a plurality of the caulking pieces on the circumference. The plurality of caulking pieces are inserted into the one insertion hole, and the tip end portions of the caulking pieces are bent to the outer peripheral side and overlapped with the opening peripheral edge of the insertion hole from the side opposite to the base portion. The vibration isolator according to any one of claims 1 to 4.   A fluid chamber in which a part of the wall portion is formed of the main rubber elastic body is formed, an incompressible fluid is sealed in the fluid chamber, and the first attachment member passes through the base portion. An injection hole is formed, and one end of the injection hole opens in the wall portion of the fluid chamber, and the other end of the injection hole opens on the inner peripheral side of the cylindrical fitting, The vibration-proof device according to claim 5, wherein the plug is fluid-tightly sealed with a plug.   The caulking piece of the first mounting member is covered with a covering rubber layer, and the insertion hole of the bracket is formed in a slit shape, and the caulking piece is inserted into and fixed to the insertion hole. The vibration isolator according to any one of claims 1 to 4, wherein the insertion hole is sealed fluid-tightly.   A plurality of the caulking pieces are formed on the first mounting member, and a plurality of slit-shaped insertion holes extend in parallel with the bracket, and the caulking pieces are inserted into the insertion holes, respectively. The anti-vibration device according to claim 7.

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