JP5802482B2 - Vibration isolator and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vibration isolator and a manufacturing method thereof.

  Conventionally, as an anti-vibration device such as an engine mount that supports the vibration of a vibration source such as an automobile engine so as not to be transmitted to the vehicle body side, the first mounting plate and the second mounting plate that are vertically opposed to each other A block-shaped body rubber interposed between both mounting plates is vulcanized and bonded, and a first mounting plate and a second mounting plate are connected and integrated.

  In such a vibration isolator, a stopper function is incorporated in order to restrict an excessive relative displacement between the two mounting plates due to a swing of a vibration source such as an engine. For example, in the following Patent Document 1, a pair of left and right upper stopper portions that are bent toward the lower mounting plate side are provided at the left and right side edge portions of the upper mounting plate, and the left and right side edge portions of the lower mounting plate are provided. A pair of left and right lower stopper portions that are bent toward the upper mounting plate side are provided, and both are disposed to face each other with a predetermined distance therebetween, whereby a stopper in the left-right direction is configured. However, in this case, since there is no stopper function in the front-rear direction, the amount of displacement in the front-rear direction increases, and the durability of the vibration isolator may be reduced.

  Therefore, in order to exert a stopper function not only in the left-right direction but also in the front-rear direction, for example, in Patent Document 2 below, a separate stopper is provided so as to overlap the upper mounting plate vulcanized and bonded to the main rubber from above. An all-round stopper is configured by providing a plate and surrounding a pair of left and right stopper portions provided on the lower mounting plate with a frame-like stopper portion provided integrally with the stopper plate over the entire circumference. Further, in Patent Document 3 below, an all-round stopper is configured by bending a pair of left and right stopper portions on the upper mounting plate, and then installing stopper bolts at both front and rear end portions of the pair of stopper portions. ing. However, these conventional techniques require separate parts such as a stopper plate and a stopper bolt in order to form the all-round stopper, resulting in a large number of parts, leading to an increase in cost and weight.

  Further, in Patent Document 4 below, by forming an L-shaped stopper portion sandwiching point-symmetrical corner portions formed at the left and right end portions of the upper mounting plate toward the lower mounting plate side, The point which exhibited the stopper function in the left-right direction and the stopper function in the front-back direction is disclosed. As described above, in the configuration of Patent Document 4, displacement control in the front-rear direction is possible, but since the upper mounting plate has an L-shaped stopper, the structure of the vulcanization mold for vulcanizing the main rubber is complicated. In addition, there is a problem that the shape of the main rubber tends to be large due to the restriction of the vulcanization mold.

  Patent Document 5 listed below discloses press fitting a ring of the stopper portion in order to reinforce the pair of left and right stopper portions provided on the upper mounting plate. However, this ring does not exhibit the stopper function in the front-rear direction, and there is a problem that the number of parts increases by providing the ring.

JP 2006-273156 A JP 2009-008251 A Japanese Utility Model Publication No. 03-017339 Japanese Utility Model Laid-Open No. 03-017338 Japanese Utility Model Publication No. 60-037639

  In view of the above points, an object of the present invention is to provide a vibration isolator capable of exhibiting a stopper function in the left-right direction and the front-rear direction while suppressing an increase in the number of parts.

The vibration isolator according to the present invention includes a first mounting plate and a second mounting plate that are vertically opposed to each other, and vulcanized and bonded to the first mounting plate and the second mounting plate and interposed between the mounting plates. A block-shaped main body rubber, and the first mounting plate and the second mounting plate are connected and integrated through the main body rubber. The first mounting plate has a pair of left and right inner stopper portions that are bent toward the second mounting plate on both sides of the main body rubber. The second mounting plate includes a base plate portion to which the main body rubber is vulcanized and bonded, and bent from the left and right side edge portions of the base plate portion toward the first mounting plate side. A pair of left and right first outer stopper portions opposed to the respective outer surfaces of the inner stopper portion, and the first outer stopper portion are folded separately from the front and rear side edges of the base plate portion toward the first mounting plate side. A front and rear second outer stopper portion that is curved and exhibits a stopper function in the front-rear direction between the front and rear end portions of the pair of left and right inner stopper portions. At the left and right side edge portions of the front and rear second outer stopper portions, claw portions extending in a direction approaching each other from the front and rear second outer stopper portions are formed outside the first outer stopper portion. Is fixed to the outer surface of the first outer stopper portion.

The manufacturing method of the vibration isolator according to the present invention includes a first mounting plate having a U-shaped cross section in which the pair of inner stopper portions are bent at the left and right side edges when the vibration isolator is manufactured, A second mounting plate having a U-shaped cross-section in which the pair of first outer stopper portions are bent at the left and right side edge portions is arranged to face each other so that the inner sides of the U-shapes face each other. The block-shaped main body rubber is interposed by vulcanization adhesion to the mounting plate, and after the main body rubber is vulcanized, the extending portions on both the front and rear sides of the second mounting plate are directed toward the first mounting plate side. The second outer stopper portion is formed by bending each of them. In addition, the claw portions are bent at the left and right side edge portions in the extended portion of the second mounting plate, and the extended portion is bent to form the second outer stopper portion. The claw portion is fixed to the outer surface of the first outer stopper portion.

  In a preferred aspect of the present invention, the second outer stopper portion includes a pair of stopper main body portions provided at left and right ends corresponding to the pair of left and right inner stopper portions at front and rear side edges of the base plate portion. The connecting portion for connecting the tip portions of the pair of stopper main body portions in a bridging manner may be used.

Further, in a preferred embodiment of present invention, the tip portion of the claw portion may be provided in a shape to escape to the outside against the outer surface of the first outer stopper portion or, alternatively, the first outer stopper portion The front and rear side edges may be provided in a shape that escapes inward with respect to the inner surface of the claw. Moreover, the said nail | claw part may be formed in the V shape narrower toward the front end side. The claw portion may be fixed to the outer surface of the first outer stopper portion by welding.

  According to the present invention, the second mounting plate to which the main rubber is vulcanized and bonded is provided with a pair of left and right first outer stopper portions, and the front and rear second outer stopper portions are separated from the first outer stopper portion. Since it is provided by bending, it is possible to exhibit a stopper function in the left-right direction and the front-rear direction while suppressing an increase in the number of parts.

It is a front view of the vibration isolator which concerns on 1st Embodiment of this invention. It is a bottom view of the vibration isolator. It is a longitudinal cross-sectional view (cross section equivalent to the III-III line | wire of FIG. 2) which shows the arrangement | positioning state at the time of mounting | wearing the said vibration isolator with a motor vehicle. It is a front view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a bottom view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a front view of the vibration isolator which concerns on 2nd Embodiment. It is a top view of the vibration isolator. It is a side view of the vibration isolator. It is a front view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a top view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a side view after bending of the 2nd outside stopper part about the vibration isolator. It is a side view of the vibration isolator which concerns on 3rd Embodiment. It is a side view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a top view before bending of the 2nd outside stopper part after vulcanization about the vibration isolator. It is a side view of the vibration isolator which concerns on 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment) (Reference example)
1 to 3 show an engine mount 10 as a vibration isolator according to the first embodiment. The engine mount 10 includes a lower mounting plate 12 as a first mounting plate and an upper mounting plate 14 as a second mounting plate, which are opposed to each other at a predetermined distance in the vertical direction Z in FIG. The main body rubber 16 is provided. Here, for convenience of explanation, unless otherwise specified, the up-down direction Z and the left-right direction Y refer to the up-down direction and the left-right direction in FIG. 1, and the front-rear direction X refers to the direction perpendicular to the paper surface in FIG. reference).

  The main rubber 16 is a rubber elastic body having a substantially rectangular block shape in which the upper and lower end faces 18, 20, the left and right end faces 22, 24, and the front and rear end faces 26, 28 are spaced apart from each other on three orthogonal axes. The side mounting plate 12 and the upper mounting plate 14 are vulcanized and bonded. That is, the upper mounting plate 14 is vulcanized and bonded to the upper end surface 18 of the main rubber 16, and the lower mounting plate 12 is vulcanized and bonded to the lower end surface 20. Thereby, the lower mounting plate 12 and the upper mounting plate 14 are connected and integrated through the main body rubber 16. In this example, as shown in FIG. 2, the main body rubber 16 has a rectangular shape in plan view in which the dimension in the left-right direction Y is larger than the dimension in the front-rear direction X.

  The lower attachment plate 12 is a plate-shaped metal fitting that is attached to either the engine or the vehicle body (the vehicle body in this example). The lower mounting plate 12 includes a base plate portion 30 vulcanized and bonded to the lower end surface 20 of the main rubber 16, and a pair of front and rear mounting pieces extending in the front-rear direction X from both front and rear edges of the base plate portion 30. Parts 32, 32 and a pair of left and right inner stopper parts 34, 34 bent from the left and right side edges of the base plate part 30 toward the upper mounting plate 14 side.

  As shown in FIG. 2, the base plate portion 30 of the lower mounting plate 12 has a rectangular shape in which the left-right direction Y is longer than the front-rear direction X corresponding to the lower end surface 20 of the main rubber 16. The attachment piece 32 extends in the front-rear direction from substantially the entire front and rear side edges of the base plate part 30, and has a substantially triangular shape with a narrower width at the front end portion. Is provided.

  The pair of left and right inner stopper portions 34, 34 are provided opposite to each other in the left-right direction Y on both sides of the main body rubber 16 and have a substantially rectangular flat plate shape. The inner stopper portion 34 is bent upward from substantially the entire left and right side edges of the base plate portion 30 and is erected vertically with respect to the base plate portion 30. As shown in FIG. 2, in this example, the inner stopper portion 34 is a wall portion having a circular arc shape in plan view in which a central portion 34C slightly bulges outward in the left-right direction Y with respect to both end portions 34E, 34E in the front-rear direction X. Is formed. Further, a bead 38 for reinforcement is formed in the inner stopper portion 34 at the root portion in the central portion 34C.

  A stopper rubber 39 is coated on the inner stopper portion 34. As shown in FIG. 2, the stopper rubber 39 is provided so as to cover the entire circumference of the inner stopper portion 34, that is, the inner surface, the outer surface, the upper surface, and both front and rear end surfaces. The stopper rubber 39 can be formed of a rubber elastic body integrated with the main body rubber 16.

  The upper mounting plate 14 is a plate-shaped bracket that is mounted on either the engine or the vehicle body (in this example, the engine). The upper mounting plate 14 is formed by bending a base plate portion 40 vulcanized and bonded to the upper end surface 18 of the main rubber 16 and the left and right side edges of the base plate portion 40 toward the lower mounting plate 12 side. A pair of left and right first outer stopper portions 42, 42, and front and rear sides that are bent from the front and rear side edges of the base plate portion 40 toward the lower mounting plate 12 independently of the first outer stopper portion 42. The second outer stopper portions 44, 44 are provided.

  The base plate portion 40 of the upper mounting plate 14 has a rectangular shape in which the left-right direction Y is longer than the front-rear direction X corresponding to the upper end surface 18 of the main body rubber 16, and a fixing bolt 46 is disposed at an approximately central portion. It is fixed in a state protruding toward The base plate portion 40 is also provided with a columnar positioning projection 48 that protrudes upward.

  The pair of left and right first outer stopper portions 42 and 42 exhibit a stopper function in the left-right direction Y between the pair of inner stopper portions 34 and 34 and sandwich the pair of inner stopper portions 34 and 34. On both sides, they are provided opposite to each other in the left-right direction Y. That is, the pair of left and right first outer stopper portions 42 and 42 are arranged to face each outer surface of the pair of left and right inner stopper portions 34 and 34 (more specifically, the outer surface of the stopper rubber 39) with a space therebetween. Has been. The first outer stopper portion 42 is bent downward from substantially the entire left and right side edge portions of the base plate portion 40, and has a substantially rectangular flat plate shape standing vertically with respect to the base plate portion 40. ing.

  The second outer stopper portion 44 exhibits a stopper function in the front-rear direction X between the inner stopper portion 34 and the front and rear end portions 34E, 34E of the pair of left and right inner stopper portions 34, 34 (more specifically, Are arranged opposite to each other so as to ensure a predetermined stopper clearance in the front-rear direction X with respect to the front and rear end faces of the stopper rubber 39. The second outer stopper portion 44 is bent from the front and rear side edges of the base plate portion 40 downward and separately from the first outer stopper portion 42. Accordingly, the bent portion 53 of the first outer stopper portion 42 and the base plate portion 40 and the bent portion 54 of the second outer stopper portion 44 and the base plate portion 40 are formed in a rectangular shape. It is divided at each corner. More specifically, in this example, the second outer stopper portion 44 is entirely provided independently of the first outer stopper portion 42. Therefore, the first outer stopper portion 42 and the second outer stopper portion are provided. The whole 44 is divided and provided at each corner of the base plate portion 40. The second outer stopper portion 44 has a flat plate shape standing vertically with respect to the base plate portion 40.

  The second outer stopper portion 44 may be provided by being bent downward from the entire front and rear side edges of the base plate portion 40. In this example, the pair of left and right side stoppers is provided at the front and rear side edges of the base plate portion 40. A pair of stopper main body portions 45, 45 are provided at both left and right end portions corresponding to the inner stopper portions 34, 34, respectively. Since the second outer stopper portion 44 exhibits a stopper function in the front-rear direction X with the inner stopper portion 34, it is sufficient if the second outer stopper portion 44 is provided within a range in contact with the inner stopper portion 34. Therefore, the second outer stopper portion 44 is bent when the second outer stopper portion 44 is bent by forming the second outer stopper portion 44 so as to be bent at both right and left end portions of the front and rear side edges of the base plate portion 40. Processing can be facilitated.

  On the other hand, since it is difficult to ensure rigidity if the stopper body portions 45, 45 at the left and right end portions are provided independently as they are, in this embodiment, as shown in FIG. The end portions of the portions 45 and 45 are connected to each other by a connecting portion 50 in a bridging manner. The connecting portion 50 is a belt-like flat plate portion extending in the left-right direction Y so as to connect the lower end portions of the left and right stopper main body portions 45, 45, and extends integrally from the stopper main body portion 45.

  When manufacturing the engine mount 10 according to the present embodiment, as shown in FIGS. 4 and 5, the pair of inner stopper portions 34, 34 are bent at the left and right side edges. The inner side of each U-shape faces the side-mounting plate 12 and the upper-side mounting plate 14 having a U-shaped cross-section in which the pair of first outer stopper portions 42 and 42 are bent at the left and right side edges. Thus, the main body rubber 16 is interposed by vulcanization adhesion to both the mounting plates 12 and 14. That is, at the time of vulcanization molding of the main body rubber 16, the upper mounting plate 14 is not provided with the second outer stopper 44, and as shown in FIG. A flat extending portion 52 in a state before the portion 44 is bent is formed. In this state, the lower mounting plate 12 and the upper mounting plate 14 are set in a vulcanization mold, and the main rubber 16 and the stopper rubber 39 are vulcanized in the vulcanization mold. The parting position in the vulcanization mold can be set to a position indicated by a chain line L in FIG. 5, and the molds can be punched away from each other in the front-rear direction X. Thereby, the vulcanized molded product shown in FIGS. 4 and 5 is obtained.

  Next, the obtained vulcanized molded product is bent. That is, the second outer stopper portion 44 is formed by bending the extended portions 52 on both the front and rear sides of the upper mounting plate 14 toward the lower mounting plate 12 with respect to the vulcanized molded product. At this time, the second outer stopper portion 44 has a shape in which the left and right stopper main body portions 45, 45 are connected by the connecting portion 50 as described above, and the bent portion 54 to be bent is formed on the base plate portion 40. Only the left and right ends of the front and rear side edges are provided. The bent portion 54 is set at a location that does not overlap the lower mounting plate 12 in a plan view shown in FIG. Therefore, when the upper mounting plate 14 is bent by pressing the vicinity of the bent portion 54 with a pressing jig from the adhesive surface side of the main body rubber 16, the lower mounting plate 12 does not get in the way, and the bending process is performed. It is easy to do. By performing such bending, the engine mount 10 shown in FIGS. 1 and 2 is obtained.

  The engine mount 10 according to the present embodiment having the above-described configuration is such that the lower mounting plate 12 fixes the mounting piece 32 with a bolt (not shown) while being inclined obliquely between the engine and the vehicle body as shown in FIG. As a result, the upper mounting plate 14 is fastened and fixed to the engine by the fixing bolts 46 and is mounted on the automobile. In detail, the front-rear direction X is directed in the vehicle front-rear direction, and the left-right direction Y is assembled in a state inclined at a predetermined angle θ from the horizontal plane in the vehicle width direction. FIG. 3 shows a state before the engine load is input, and the upper mounting plate 14 is displaced obliquely downward in FIG. 3 by the load input. Thereby, a predetermined stopper clearance is ensured between the left and right first outer stopper portions 42 and 42 and the inner stopper portions 34 and 34 facing the first outer stopper portions 42 and 42, respectively.

  According to the engine mount 10, when the engine vibration in the vehicle vertical direction or the width direction becomes equal to or greater than a certain level, the inner stopper portion 34 of the lower mounting plate 12 and the first outer stopper portion 42 of the upper mounting plate 14. Contact with each other via the stopper rubber 39, the excessive relative displacement between the lower mounting plate 12 and the upper mounting plate 14 in the direction is limited. When the engine vibration in the longitudinal direction of the vehicle exceeds a certain level, the front and rear end portions 34E of the inner stopper portion 34 of the lower mounting plate 12 and the second outer stopper portion 44 of the upper mounting plate 14 By contacting through the rubber 39, excessive relative displacement between the lower mounting plate 12 and the upper mounting plate 14 in the vehicle front-rear direction is limited. Therefore, it is possible to realize a stopper function on the entire circumference.

  And according to the present embodiment, the front and rear second outer stopper portions 44 are bent separately from the left and right first outer stopper portions 42 on the upper mounting plate 14 to which the main body rubber 16 is vulcanized and bonded. While suppressing an increase in the number of parts and without impairing the vulcanization formability, it is possible to provide a stopper function around the entire circumference. Specifically, by providing the front and rear second outer stopper portions 44 independently of the left and right first outer stopper portions 42, only the first outer stopper portion 42 is bent in advance when the main rubber 16 is vulcanized. It is possible to perform vulcanization molding in a state where the second outer stopper portion 44 is not formed. In this way, when the main rubber 16 is vulcanized, the absence of the front and rear second outer stopper portions 44 does not complicate the die-cutting configuration of the vulcanization mold, so that the vulcanization moldability is not impaired. . Then, by forming the front and rear second outer stopper portions 44 by bending after vulcanization, it is possible to have a full-circle stopper function together with the left and right first outer stopper portions 42 formed in advance. From the above, it is possible to realize a stopper function on the entire circumference while reducing the number of parts, cost, and mass with respect to the conventional product provided with a separate stopper fitting.

  In addition, according to the present embodiment, the second outer stopper portion 44 divided into the left and right end portions in consideration of workability in bending after vulcanization is connected in a bridging manner by the connecting portion 50, so that the second outer side The rigidity of the stopper portion 44 can be improved. Therefore, the durability can be improved by improving the rigidity of the second outer stopper portion 44 while ensuring the workability in the post-bending process.

(Second Embodiment)
6 to 11 relate to an engine mount 10A as a vibration isolator according to the second embodiment. In this example, the point which provided the nail | claw part 60 in the right-and-left both sides edge part of the 2nd outer side stopper part 44 differs from 1st Embodiment mentioned above.

  That is, in the second embodiment, the claw portions 60 are added to the left and right side edges of the pair of front and rear second outer stopper portions 44, 44 in the engine mount 10 according to the first embodiment. 6-8, the nail | claw part 60 is extended in the direction (front-back direction X) mutually approached from the front-and-back 2nd outer side stopper parts 44 and 44 on the outer side of the 1st outer side stopper part 42, 2nd. The outer stopper 44 is bent vertically from the side edge. The claw portions 60 are respectively provided at the left and right side edge portions of the front and rear outer stopper portions 44, 44, and a total of four claw portions 60 are formed. As shown in FIG. 8, the claw portion 60 has an elongated rectangular plate shape in this example.

  The claw portion 60 extends along the outer surface so as to overlap the outer surface of the first outer stopper portion 42 and is fixed to the outer surface by welding 62 as shown in FIG. More specifically, the claw portions 60, 60 are fixed to the outer surface of the first outer stopper portion 42 in a state where the front and rear claw portions 60, 60 extending from the front and rear second outer stopper portions 44, 44 are abutted. Yes. As shown in FIG. 8, the weld 62 is applied to each claw portion 60 along the upper side portion and the lower side portion thereof. Thus, in this embodiment, since the 2nd outer side stopper part 44 is connected with the 1st outer side stopper part 42 via the nail | claw part 60, the 1st outer side stopper part 42 and the 2nd outer side stopper part 44 are perfect. Is not independent. However, both of them are formed separately, so that the bent portion 53 of the first outer stopper portion 42 and the base plate portion 40 and the bent portion of the second outer stopper portion 44 and the base plate portion 40 are formed. 54 is divided at each corner of the base plate portion 40 having a rectangular shape, and this point is common to the first embodiment.

  As shown in FIG. 7, the distal end portion of the claw portion 60 has a shape that inclines outward with respect to the outer surface of the first outer stopper portion 42, thereby forming the distal end portion as a press-fit guide 64. Has been.

  When manufacturing the engine mount 10A of the present embodiment, as shown in FIGS. 9 and 10, the claw portion 60 is bent in advance in the extended portion 52 of the upper mounting plate 14 that forms the second outer stopper portion 44. Keep it. That is, the claw portions 60 are bent at the left and right side edges of the extended portion 52. Like the first outer stopper portion 42, the claw portion 60 is bent vertically downward, that is, toward the lower mounting plate 12, and its tip portion is inclined outward as shown in FIG. 9. The press-fit guide 64 is formed by being bent into a shape. Using the upper mounting plate 14 like this, the lower mounting plate 12 and the vulcanization mold are set together with the lower mounting plate 12, and the main body rubber 16 and the stopper rubber 39 are vulcanized in the vulcanization mold. To do. 9 and 10 thus obtained, the extended portions 52 on both the front and rear sides of the upper mounting plate 14 are bent toward the lower mounting plate 12 side, and the second outer stopper portion is formed. 44 is formed.

  At that time, as shown in FIG. 11, the front and rear claws 60, 60 are displaced in a direction approaching each other along with the bending operation of the extending portion 52, and overlap the outer surface of the first outer stopper portion 42. . At this time, in this embodiment, since the press-fit guide 64 is provided at the tip of the claw portion 60, the welding strength at the claw portion 60 is ensured while allowing the second outer stopper portion 44 to be bent. can do.

  That is, the positional relationship between the inner surface of the claw portion 60 and the outer surface of the first outer stopper portion 42 affects both the bending process and the welding strength. If the gap between the inner surface of the claw portion 60 and the outer surface of the first outer stopper portion 42 is too large, there will be no problem with bending, but sufficient welding strength cannot be secured. On the contrary, when the inner surface of the claw portion 60 is positioned on the inner side of the outer surface of the first outer stopper portion 42, the claw portion 60 becomes an obstacle and the extended portion 52 cannot be bent. Therefore, it is preferable that the positional relationship between the two is set as much as possible without any gap within a range in which the inner surface of the claw portion 60 is not located on the inner side of the outer surface of the first outer stopper portion 42. However, since these dimensions have tolerances, it is required to set the positional relationship between them in consideration of the tolerances. Therefore, in this embodiment, as shown in FIG. 10, the dimension from the center in the width direction of the upper mounting plate 14 to the inner surface of the claw portion 60 is A ± a (tolerance: 2a), and the first from the center in the width direction. When the dimension to the outer surface of the outer stopper portion 42 is B ± b (tolerance: 2b), even when “(A + a) − (B−b)” is the largest difference between the two, a weldable gap (for example, 0.5 mm), thereby ensuring welding strength. On the other hand, with this setting, when the inner side surface of the claw portion 60 is located on the innermost side, a state of (A−a) <(B + b) is assumed. Even in this case, the press-fit guide 64 is provided. As a result, the claw portion 60 can be press-fitted into the outer surface of the first outer stopper portion 42, so that the second outer stopper portion 44 can be bent. Therefore, both bending work and securing of welding strength can be achieved.

  After the extending portion 52 is bent as described above to form the second outer stopper portion 44, the claw portion 60 is welded 62 to the outer surface of the first outer stopper portion 42 and fixed. Thereby, the engine mount 10A shown in FIGS.

  In the engine mount 10A, the front and rear second outer stopper portions 44 and 44 formed by rear bending are reinforced by the left and right first outer stopper portions 42 and 42 via the claw portion 60, so The rigidity of the outer stopper portions 44, 44 can be greatly improved. Further, the left and right first outer stopper portions 42 and 42 are also supported from the outside so as to be held by the claw portions 60 and 60 of the front and rear second outer stopper portions 44 and 44, so that the rigidity is improved. In particular, as shown in FIGS. 6 and 7, the first outer stopper portion 42 that is bent before vulcanization can be provided with a reinforcing bead 66 at its base portion. The second outer stopper portion 44 formed by bending may be difficult to provide reinforcement with beads. Even in such a case, the rigidity of the second outer stopper portion 44 can be improved by adopting the reinforcing configuration by the claw portion 60, which is beneficial. Since the rigidity of the stopper portions 42 and 44 is thus improved, it is not necessary to increase the plate thickness of the upper mounting plate 14 in order to improve the rigidity, and it is possible to reduce the weight by setting the plate thickness thin. Become. Moreover, since these reinforcements can be realized without increasing the number of parts, an increase in cost can be prevented.

  About 2nd Embodiment, about another structure and an effect, it is the same as that of 1st Embodiment, The same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

(Third embodiment)
12 to 14 relate to an engine mount 10B as a vibration isolator according to the third embodiment. In this example, the configuration of a press-fit guide for press-fitting the claw portion 60 into the outer surface of the first outer stopper portion 42 is different from that of the second embodiment.

  That is, in the third embodiment, instead of providing a press-fit guide at the tip of the claw portion 60, press-fit guides 68 are provided at both front and rear edges of the first outer stopper portion 42. Specifically, the front and rear side edges of the first outer stopper portion 42 are shaped to escape inwardly with respect to the inner surface of the claw portion 60, thereby forming the side edges as press-fit guides 68. Has been.

  Thus, even when the press-fitting guide 68 is provided on the first outer stopper portion 42 side, when the second outer stopper portion 44 is bent, the front and rear claw portions 60 are accompanied by the bending operation of the extended portion 52. , 60 is displaced so as to overlap the outer surface of the first outer stopper portion 42, the press-fitting guide 68 can guide the tip of the claw portion 60 to the outer surface of the first outer stopper portion 42. Therefore, it is possible to achieve both the bending of the second outer stopper portion 44 and the securing of the welding strength at the claw portion 60.

  About 3rd Embodiment, about another structure and effect, it is the same as that of 2nd Embodiment, The same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

(Fourth embodiment)
FIG. 15 relates to an engine mount 10 </ b> C as a vibration isolator according to the fourth embodiment. In this example, the shape of the claw portion 60 is different from that of the third embodiment.

  That is, in the fourth embodiment, the claw portion 60 is not formed in a rectangular shape as in the above-described embodiment, but is formed in a V shape (triangular shape) that is narrower toward the distal end side. Specifically, the front and rear claw portions 60 and 60 fixed in a state where they are abutted on the outer surface of the first outer stopper portion 42 have an upper side of one claw portion (for example, an upper side 60A of the right claw portion) and the other claw portion. The lower side of the claw part (for example, the lower side 60B of the left claw part) is provided on a straight line. Thereby, the weld 62 formed in V shape along each edge | side of the nail | claw part 60 is formed in X shape as a whole.

  According to this embodiment, since the nail | claw part 60 was formed in V shape, in each nail | claw part 60, the perimeter of the nail | claw part 60 can be welded only by the two weldings 62. FIG. That is, in the rectangular claw portion 60 shown in FIG. 12, three welds 62 are necessary to weld the entire circumference, but by forming the claw portion 60 into a V shape, Welding is possible, and all-around welding can be performed with a shorter welding length. Therefore, it is possible to increase the welding strength by performing the entire circumference welding while suppressing the welding length. In addition, as described above, by setting the opposing claw portions 60 and 60 so that the upper side on one side and the lower side on the other side are in a straight line, even between the opposing claw portions 60 and 60, it is in a straight line. It is possible to perform welding continuously, and the cost can be reduced by simplifying the welding process.

  In the fourth embodiment, other configurations and operational effects are the same as those in the third embodiment, and a description thereof is omitted.

(Other embodiments)
In the above-described embodiment, the second mounting plate 14 is used as the second mounting plate, and the second outer stopper 44 that performs the post-bending process on the upper mounting plate 14 is provided. However, the present invention is not limited thereto, and the upper mounting plate is not limited thereto. An inner stopper may be provided as the first mounting plate, and a first outer stopper portion and a second outer stopper portion may be provided using the lower mounting plate as the second mounting plate. Moreover, each shape mentioned above about the lower side mounting plate 12, the upper side mounting plate 14, and the main body rubber | gum 16 is only what showed the preferable example. In the second to fourth embodiments, the method for fixing the claw portion 60 to the outer surface of the first outer stopper portion 42 is not limited to welding, and other joining methods such as mechanical clinch may be employed. Good. Although not enumerated one by one, various modifications can be made without departing from the spirit of the present invention. In addition, the up-down, left-right, and front-back directions in the present invention are directions as a vibration isolator alone, and the direction when mounted on the vehicle is not limited thereto.

10 ... Engine mount 12 ... Lower mounting plate (first mounting plate)
14 ... Upper mounting plate (second mounting plate) 16 ... Main body rubber 34 ... Inner stopper portion 34E ... Front and rear end portions 40 ... Base plate portion 42 ... First outer stopper portion 44 ... Second outer stopper portion 45 ... Stopper main body portion DESCRIPTION OF SYMBOLS 50 ... Connection part 52 ... Extension part 60 ... Claw part 62 ... Welding 64, 68 ... Press-fit guide X ... Front-back direction Y ... Left-right direction Z ... Up-down direction

Claims (6)

A first mounting plate and a second mounting plate which are arranged opposite to each other in a vertical direction; a block-shaped main body rubber which is vulcanized and bonded to the first mounting plate and the second mounting plate and interposed between the two mounting plates; In the vibration isolator in which the first mounting plate and the second mounting plate are connected and integrated through the main body rubber,
The first mounting plate has a pair of left and right inner stopper portions that are bent toward the second mounting plate side on both sides of the main body rubber,
The second mounting plate includes a base plate portion to which the main body rubber is vulcanized and bonded, and bent from the left and right side edge portions of the base plate portion toward the first mounting plate side. A pair of left and right first outer stopper portions opposed to the respective outer surfaces of the inner stopper portion, and the first outer stopper portion are folded separately from the front and rear side edges of the base plate portion toward the first mounting plate side. are tracks formed have a second outer stopper portion before and after exerting the longitudinal direction of the stopper function with the front and rear end portions of the pair of left and right inner stopper,
At the left and right side edge portions of the front and rear second outer stopper portions, claw portions extending in a direction approaching each other from the front and rear second outer stopper portions are formed outside the first outer stopper portion. Is fixed to the outer surface of the first outer stopper portion . Tip of the claw portion, the vibration isolator according to claim 1, characterized in that provided in the shape escaping outwardly relative to the outer surface of the first outer stopper portion. The front and rear side edge portions of the first outer stopper portion, vibration isolating apparatus according to claim 1, characterized in that provided in the shape to escape inside the inner surface of the pawl portion. The vibration isolator according to any one of claims 1 to 3 , wherein the claw portion is formed in a V-shape that is narrower toward a distal end side. The vibration isolator according to any one of claims 1 to 4 , wherein the claw portion is fixed to the outer surface of the first outer stopper portion by welding. It is a manufacturing method of the vibration isolator of any one of Claims 1-5 ,
A first U-shaped first mounting plate in which the pair of inner stopper portions are bent at the left and right side edge portions, and a cross-sectional shape in which the pair of first outer stopper portions are bent at the left and right side edge portions. The second mounting plate having a U-shape is opposed to each other so that the inner sides of the U-shapes face each other, and the block-shaped main body rubber is interposed by vulcanization adhesion to both the mounting plates. After the vulcanization of the main body rubber, the extending portions on both the front and rear sides of the second mounting plate are bent toward the first mounting plate to form the second outer stopper portion ; and
After claw portions are bent at left and right side edge portions of the extended portion of the second mounting plate, the extended portion is bent to form the second outer stopper portion, and then the claw portion is formed. Is fixed to the outer surface of the first outer stopper portion,
The manufacturing method of the vibration isolator containing this .

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