JP4959462B2 - Anti-vibration device manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a vibration isolator, wherein the first and second mounting brackets are spaced apart from each other, and are interposed between the first and second mounting brackets to elastically connect them. The present invention relates to an advantageous manufacturing method of a vibration isolator having a rubber elastic body to be connected.

  Conventionally, as one type of this type of vibration isolator, inner cylinders as first and second mounting brackets, which are spaced apart in the radial direction under the condition that they are respectively attached to two members to be anti-vibrated A so-called cylindrical mount in which a metal fitting and an outer cylinder metal fitting are connected by a rubber elastic body is known, and this has been widely used as an automobile engine mount or the like.

  By the way, in such a cylindrical mount, generally, the rubber elastic body is vulcanized and bonded to the inner cylinder fitting and the outer cylinder fitting, respectively. Tensile strain due to shrinkage after vulcanization occurs in the rubber elastic body connected to the metal fitting, and this inevitably adversely affects the durability of the rubber elastic body. Therefore, in such a conventional cylindrical mount, in order to eliminate the tensile strain of the rubber elastic body and improve the durability, first, when it is inserted between the engine of the automobile and the body, etc. It has been necessary to perform a troublesome and time-consuming work such as drawing the cylindrical fitting and then press-fitting the outer cylindrical fitting into the ring-shaped bracket fixed to the body or the like.

  Under such circumstances, Patent Document 1 listed below discloses a vibration isolator that is easier to manufacture than the above-described cylindrical mount. That is, in the vibration isolator disclosed therein, the rubber elastic body has a block shape having a predetermined height in the main vibration input direction, and is attached to the engine or the like with a first mounting bracket ( The inner metal fitting is partially vulcanized and bonded to the rubber elastic body so as to extend in a direction perpendicular to both the height direction and the left-right direction. In addition, the metal plate is U-shaped or U-shaped so that the second mounting bracket (outer bracket) mounted on the body of the automobile surrounds the left and right side surfaces and the front end surface excluding the base bottom surface of the rubber elastic body. And a bottom wall fitting having at least a shape portion corresponding to the base bottom surface of the rubber elastic body. The rubber elastic body to which the first mounting bracket is vulcanized and bonded is surrounded by the second mounting bracket and the bottom wall bracket in a non-adhesive manner over the entire circumference. Thus, the first mounting bracket and the second mounting bracket are elastically connected by a rubber elastic body interposed therebetween to constitute a vibration isolator.

  In the vibration isolator having such a structure, the first mounting bracket is vulcanized and bonded to the rubber elastic body, but the second mounting bracket surrounding the rubber elastic body is attached to the rubber elastic body. Since the rubber elastic body is not bonded, the rubber elastic body can be freely contracted after vulcanization, and it can be advantageously avoided that tensile deformation occurs in the rubber elastic body. Then, in order to eliminate such tensile strain, there is no need to perform drawing processing on the outer cylinder fitting or press-fitting work of the outer cylinder fitting into the ring-shaped bracket, which has been performed in a conventional cylindrical mount or the like. Therefore, the manufacturing process can be simplified effectively.

  However, in such a conventional non-adhesive type vibration isolator, as described above, the surrounding bracket of the second mounting bracket is formed in a U shape or a U shape that opens the metal flat plate downward. Two flat side walls disposed opposite to each other so as to be positioned on both the left and right sides with the rubber elastic body interposed therebetween, in a form formed by bending, that is, in a state surrounding the rubber elastic body, Since the ceiling wall portion that connects the upper end portions of the two side wall portions to each other is integrally formed, in particular, input in the vertical direction or in the direction in which the two side wall portions face each other. Sufficient strength against the load, that is, sufficient strength against bending or bending deformation of the two side walls in the opposite direction to each other or bending (bending or bending deformation of each side wall in the thickness direction). The problem of being difficult to do is inherent .

  On the other hand, in Patent Document 2 below, the end portions on both sides in the width direction of each of the two side wall portions are bent at substantially right angles toward the outside in the opposing direction of the two side wall portions. The flat reinforcing ribs are integrally formed, and the reinforcing ribs are integrally formed so as to extend integrally from the lower end portions of the side wall portions outward in the opposite directions of the two side wall portions. The surrounding bracket is connected to the outer flange portion, and the surrounding bracket is attached to the rubber elastic body in which the first mounting bracket and the bottom wall bracket are vulcanized and bonded together, except for the bottom of the base portion. A technique for manufacturing a target vibration isolator by assembling so as to surround both side surfaces and the front end surface has been clarified. According to such a method for manufacturing a vibration isolator, each side wall portion of the surrounding metal fitting is reinforced by the reinforcing ribs, so that the strength of the surrounding metal fitting and thus the whole vibration isolator can be improved.

  However, in order to obtain such a surrounding metal fitting, the flat metal fitting is bent in a U-shape in the length direction, and thereafter, or in advance thereof, the ends on both sides in the width direction of the flat metal fitting are raised at right angles. It is necessary to perform complicated and difficult press work including a plurality of bending processes for the same processed part of the flat metal fitting, such as bending to a flat plate. For this reason, the conventional method requiring such press work has a drawback that the manufacturing process of the surrounding metal fitting and thus the entire vibration isolator is unavoidably complicated.

  In addition, when a plurality of types of vibration isolators having different strengths are manufactured by such a conventional method, the strengths differing from each other due to differences in the shape of the reinforcing ribs, etc., although the molding is not easy as the surrounding metal fittings. It is necessary to prepare a plurality of types of products, and therefore, the manufacturing process of the entire device becomes even more complicated, and depending on the shape of the reinforcing rib, a press device for press-molding the surrounding metal fitting There was even a fear that it would be forced to make a big economic burden.

JP 2003-202053 A JP 2006-177544 A

  Here, the present invention has been made in the background as described above, and the solution is to manufacture a plurality of types of vibration isolators having different strengths easily and at low cost. Another object of the present invention is to provide a method of manufacturing a vibration isolator that can be used.

In the present invention, in order to solve such a problem, the gist of the present invention is that the first mounting bracket and the second mounting bracket that are spaced apart from each other, the first mounting bracket, and the A block shape having a rubber elastic body interposed between the second mounting bracket and elastically connecting them, the rubber elastic body having a predetermined height in the main vibration input direction Further, the first mounting bracket is partially embedded in the rubber elastic body so as to extend in a direction perpendicular to both the height direction and the left-right direction. And the second mounting bracket is bent so as to surround both the left and right side surfaces excluding the base bottom surface and the front end surface of the rubber elastic body, and the rubber elastic body A bottom having at least a shape corresponding to the bottom of the base The surrounding metal fittings and the bottom wall metal fittings cooperate with each other in a non-bonded state with respect to the rubber elastic body so as to surround the rubber elastic body over the entire circumference. A method of manufacturing a structured vibration isolator, wherein: (a) the first mounting bracket is partially in the height direction and the left-right direction with respect to the rubber elastic body. A step of preparing an integrally vulcanized molded product of the first mounting bracket and the rubber elastic body, which is vulcanized and bonded in a state of being embedded in a direction extending at a right angle; and (b) the prepared A step of surrounding the rubber elastic body of the integrally vulcanized molded product with the surrounding metal fitting and the bottom wall metal fitting of the second mounting bracket in a non-adhesive manner over the entire circumference thereof; and (c) the second Prepare multiple types of reinforcing brackets that reinforce the mounting brackets with different shapes or strengths. And step, optionally selected from among a plurality of types of reinforcing brackets which are prepared (d) said, seen including a step of fixedly welded reinforcing bracket which is the selected in said second mounting member, and Either of the end surfaces of the rubber elastic body is provided with an engaging portion on the reinforcing metal fitting, and the engaging portion is located on both sides of the extending direction of the portion embedded in the rubber elastic body of the first mounting metal fitting. In a state where the reinforcing bracket extends the engagement portion toward the inner side of the surrounding bracket in the second mounting bracket, the second mounting bracket can be engaged with one side. The vibration isolator manufacturing method is characterized in that it is welded and fixed to .

  In short, in the method for manufacturing a vibration isolator according to the present invention, the reinforcing bracket made of a member separate from the surrounding bracket and the bottom wall bracket of the second mounting bracket is welded and fixed to the second mounting bracket. Thus, the second mounting bracket, and thus the entire device is reinforced. In addition, as such a reinforcing metal fitting, for example, by using a metal fitting arbitrarily selected from a plurality of types having different strengths due to differences in shape, thickness, material, etc. The strength of the entire apparatus can be arbitrarily changed, and although the shapes are different from each other, when using one arbitrarily selected from a plurality of types having the same strength, for example, The strength of the second mounting bracket or the entire apparatus can be arbitrarily changed by variously changing the welding position of the selected reinforcing bracket to the second mounting bracket. In other words, according to the method of the present invention, when obtaining a plurality of types of vibration isolators having different strengths, the parts constituting the vibration isolator excluding the reinforcing bracket, that is, the first mounting bracket is a rubber elastic body. It is possible to use an integrally vulcanized molded product obtained by vulcanization bonding and a second mounting bracket including a surrounding bracket and a bottom wall bracket as a common component.

  For this reason, in the method for manufacturing the vibration isolator according to the present invention, unlike the conventional method, the end portions on both sides in the width direction of each side wall portion are bent, and the reinforcing ribs are integrally formed, so that molding is easy. No enclosure metal fittings are used. Therefore, in order to change the strength of the target vibration isolator, multiple types of enclosure metal fittings with different strengths due to differences in the shape of the reinforcing ribs are prepared. There is no need to do that. And thereby, in order to form a plurality of types of surrounding metal fittings having different strengths from each other, a plurality of types of press devices can be advantageously avoided.

  According to one of the preferred embodiments of the manufacturing method of the vibration isolator according to the present invention, the rubber elastic body is interposed in a state where the surrounding metal fitting of the second mounting bracket surrounds the rubber elastic body. The two side wall portions arranged opposite to each other so as to be positioned on both the left and right sides of the two sides, and the portion corresponding to the base of the rubber elastic body in each of the two side wall portions, are directed outward in the facing direction. And the reinforcing metal fitting is formed of a plate metal, and the side wall and the outer flange of the enclosure metal Are fixed to each other by welding.

  According to this aspect, in a relatively simple structure, the second mounting bracket, and thus the entire device, is reliably reinforced by the reinforcing bracket, and the strength of the entire device can be effectively improved. obtain.

Further, according to the manufacturing how the vibration damping device according to the present invention, the engaging portion is provided on the reinforcement bracket engagement portion, extending the buried portions to the rubber elastic body of the first mounting member The reinforcing metal fitting is connected to the inner side of the surrounding metal fitting in the second mounting metal so that it can be engaged with either one of the end surfaces of the rubber elastic body located on both sides in the outgoing direction. In a state of extending toward the end, the second mounting bracket is fixed by welding.

According to such a method , in the target vibration isolator, the engaging portion of the reinforcing metal fitting can be engaged with the rubber elastic body in the direction in which the rubber elastic body is pulled out from the second mounting metal fitting. Thereby, the rubber elastic body can be effectively prevented from being pulled out from the second mounting bracket. As a result, it is possible to advantageously manufacture a vibration isolator capable of stably exhibiting a desired vibration isolating performance.

  As is apparent from the above description, according to the method for manufacturing a vibration isolator according to the present invention, a plurality of types of vibration isolators having different strengths can be manufactured very easily and at low cost.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 to FIG. 3 show, as an example of an anti-vibration device manufactured according to the method of the present invention, an automobile engine mount in which main vibrations are inputted in the vertical direction, its front form, top form, and longitudinal section form. And are shown respectively. As is apparent from these drawings, the engine mount 10 includes a first mounting bracket 12 and a second mounting bracket 14 that are disposed at a predetermined distance, and are interposed between the brackets 12 and 14. The rubber elastic body 15 is elastically connected to each other.

  More specifically, the first mounting bracket 12 includes a mounting portion 16 provided with a plurality of bolt holes 13 and a substantially pentagonal columnar shaft portion 17 extending integrally from the mounting portion 16. ing.

  Further, the rubber elastic body 15 interposed between the first mounting bracket 12 and the second mounting bracket 14 has a main vibration input direction in a state where the engine mount 10 is mounted on an automobile. The height dimension in the vertical direction in FIG. 1 and the width dimension in the left-right direction in FIG. 1 which is a direction perpendicular to the main vibration input direction are substantially the same dimension, and the height direction (in FIG. The thickness dimension in the direction perpendicular to the paper surface of FIG. 1 which is a direction perpendicular to both the vertical direction) and the width direction (left-right direction in FIG. 1) is smaller than the height and width as a whole. It has a substantially rectangular block shape. Hereinafter, for the sake of convenience, the height direction of the rubber elastic body 15 is referred to as the vertical direction, the width direction is referred to as the left-right direction, and the thickness direction is referred to as the front-rear direction.

  In the rubber elastic body 15, the base 18 that gives the lower end thereof bulges on both sides in the left-right direction, and the width of the base 18 extends upward from the base 18. Two shoulder portions 22a and 22b which are larger than the width of 20 are formed. Further, a substantially trapezoidal empty space 28 is formed at the center in the width direction of the base portion 18 so as to extend through in the thickness direction. Thus, the rubber elastic body 15 is tuned so that the hardness thereof is moderately soft.

  Furthermore, in the rubber elastic body 15, the base bottom surface 24 that is the lower bottom surface of the base portion 18 is configured by a flat surface that extends in the horizontal direction. In addition, positioning protrusions 26 are integrally formed on both side end portions of the base bottom surface 24 in the left-right direction so as to extend continuously in the front-rear direction.

  And with the extension part 20 of such a rubber elastic body 15, the shaft portion 17 of the first mounting bracket 12 is embedded so as to extend in the thickness direction of the rubber elastic body 15, They are vulcanized and bonded together. That is, here, the integrally vulcanized molded product 30 is composed of the rubber elastic body 15 and the first mounting member 12 that is vulcanized and bonded in a state in which the rubber elastic body 15 is partially embedded in the extended portion 20 that is an upper portion thereof. However, it is formed.

  On the other hand, the second mounting bracket 14 includes a bottom wall bracket 32 and an enclosure bracket 34. The bottom wall fitting 32 as a whole has a long rectangular flat plate shape having a width substantially the same as the thickness of the rubber elastic body 15. Further, in the bottom wall fitting 32, a U-shaped positioning portion 36 that opens downward with a sufficiently low height is bent at an intermediate portion in the length direction. The upper surface has a shape corresponding to the shape of the base bottom surface 24 of the rubber elastic body 15 in which the positioning protrusions 26 are provided on both sides in the width direction. Further, one bolt hole 38 is formed at each of both end portions in the length direction of the bottom wall fitting 32.

  The encircling metal fitting 34 has a U-shape that opens a long rectangular metal plate having substantially the same width as the bottom wall metal fitting 32 toward the lower side with a sufficiently high height at an intermediate portion in the longitudinal direction. It has a form that is bent in the thickness direction. That is, in the surrounding metal fitting 34, the left and right side wall portions 40a and 40b extending in the up and down direction, with the middle portion in the longitudinal direction facing each other with a predetermined distance in the left and right direction (longitudinal direction), While the upper side portions of the two side wall portions 40a and 40b are connected to each other, the U-shaped portion 44 has a ceiling wall portion 42. The flat left and right mounting flange portions 48a and 48b have one each.

  Further, the U-shaped portion 44 of the surrounding metal fitting 34 has a height substantially equal to or smaller than that of the rubber elastic body 15, and side surfaces on both the left and right sides in the width direction excluding the base bottom surface 24 of the rubber elastic body 15. And the front end surface (the upper end surface on the side opposite to the base bottom surface 24) can be surrounded. Further, the base portion of the rubber elastic body 15 is provided at the lower side of the left and right side wall portions 40a and 40b. Left and right side step portions 50a and 50b each having a bent shape corresponding to two left and right shoulder portions 22a and 22b provided to bulge on both sides in the width direction of 18 are provided. In addition, each step part 50a, 50b has a predetermined dimension smaller than the height from the base bottom face 24 of each shoulder part 22a, 22b of the rubber elastic body 15, respectively.

  In this case, a cylindrical housing portion 51 extending in the width direction of both the metal fittings 34 and 32 is formed by the U-shaped portion 44 of the surrounding metal fitting 34 and the U-shaped positioning portion 36 of the bottom wall metal fitting 32. So that the left and right mounting flange portions 48a, 48b of the surrounding metal fitting 34 and both end portions in the length direction of the bottom wall metal fitting 32 are overlapped with each other with the former facing upward. The metal fitting 34 and the bottom wall metal fitting 32 are assembled.

  Thus, the second mounting bracket 14 is configured as an assembly of the surrounding bracket 34 and the bottom wall bracket 32. The assembly of the surrounding metal fitting 34 and the bottom wall metal fitting 32 constituting the second mounting metal fitting 14 is not shown, but is provided on each of the surrounding metal fitting 34 and the bottom wall metal fitting 32 as will be described later. Predetermined mounting bolts are inserted into the bolt holes 46 and 38, and they are integrated by being mounted on the power unit or the body.

  In this case, the entire rubber elastic body 15 constituting the integrally vulcanized molded product 30 is placed in the cylindrical housing portion 51 of the second mounting bracket 14 with the U-shaped portion 44 and the bottom of the surrounding bracket 34. The entire circumference is surrounded by the U-shaped positioning portion 36 of the wall fitting 32 and is accommodated in a press-fitted state. In other words, the surrounding metal fitting 34 and the bottom wall metal fitting 32 cooperate with each other in a non-bonded state with respect to the rubber elastic body 15 so as to compress the rubber elastic body 15 over the entire circumference. Surrounded and positioned.

  That is, the rubber elastic body 15 as a whole is in a state of being accommodated in the cylindrical housing portion 51 of the rubber elastic body 15. The two shoulder portions 22a and 22b which are pre-compressed in the vertical direction by the shape positioning portion 36 and bulge formed on both the left and right sides of the base portion 18 are the left and right step portions 50a and 50a of the surrounding bracket 34, 50b and the bottom wall fitting 32 are further compressed in the vertical direction so that the rubber elastic body 15 is prevented from being easily pulled out from the cylindrical housing portion 51. Further, the shaft portion 17 of the first mounting bracket 12 embedded in the rubber elastic body 15 is positioned so as to extend in the axial direction of the cylindrical housing portion 51 (the width direction of the surrounding bracket 34 and the bottom wall bracket 32). Further, the mounting portion 16 is disposed so as to protrude from the inside of the cylindrical housing portion 51 to one side in the axial direction.

  Thus, in the engine mount 10, the second mounting bracket 14 is integrally assembled to the rubber elastic body 15 to which the first mounting bracket 12 is vulcanized and bonded. The mounting bracket 12 and the second mounting bracket 14 are elastically connected by a rubber elastic body 15 interposed therebetween. Although not shown, the first mounting bracket 12 is attached to one of the power unit and the body by the mounting bolt inserted into each bolt hole 13 of the mounting portion 16, while the second The mounting bracket 14 is attached to either the power unit or the body by mounting bolts inserted into the bolt holes 46 and 38 of the surrounding bracket 34 and the bottom wall bracket 32, thereby preventing the power unit from being against the body. It can be supported by vibration.

  Thus, in the engine mount 10 having such a structure, in particular, the four first reinforcing brackets 52 are fixed by welding to the surrounding bracket 34 of the second mounting bracket 14. As shown in FIGS. 4 and 5, each of the first reinforcing metal fittings 52 is made of a metal flat plate integrally having a plate-like reinforcing portion 54 and a plate-like engaging portion 56.

  The plate-like reinforcing portion 54 of the first reinforcing bracket 52 has a substantially right triangle shape as a whole, has substantially the same thickness as the first and second mounting brackets 12 and 14, and the second mounting bracket 14. The length of the vertical side (side that forms a right-angled corner of the right triangle between the bottom side) slightly shorter than the length of the side wall 40 of the surrounding bracket 34 and the extension of the mounting flange portion 48 of the surrounding bracket 34. It has a base length shorter than the extended length by a predetermined dimension (see FIG. 1).

  On the other hand, the plate-like engagement part 56 has the same thickness as that of the plate-like reinforcing part 54 and a length that is shorter by a predetermined dimension than half of the distance between the two side wall parts 40a, 40b of the surrounding metal fitting 34. It has a long and flat plate shape. Further, the plate-like reinforcing portion 54 is integrally protruded and formed at the bottom side portion of the side surface that provides the vertical side so as to extend in parallel with the bottom side.

  As shown in FIGS. 1 and 2, each of the four first reinforcing metal fittings 52 has a wide portion at the front end side of each of the left and right mounting flange portions 48a and 48b of the surrounding metal fitting 34. The side surfaces that provide the bottom side of the plate-like reinforcing portion 54 are overlapped with the widthwise both end edges on the upper surface, and the plate-like reinforcing portion 54 of the left-side and right-side side walls 40a, 40b is opposite to the widthwise end faces. Arranged in a state where end edges extending along the vertical sides on one surface in the thickness direction are overlapped with each other, the mounting flange portions 48 and the side wall portions 40 of the surrounding metal fitting 34 are superposed on them. It is fixed by welding at the site. That is, two of the four first reinforcing metal fittings 52 connect the left side wall portion 40a and the left mounting flange portion 48a of the surrounding metal fitting 34 to each other in the width direction, and the remaining two pieces. The first reinforcing metal fitting 52 is welded to the surrounding metal fitting 34 at the plate-like reinforcing portion 54 so that the right side wall portion 40b and the right mounting flange portion 48b of the surrounding metal fitting 34 are connected to each other in the width direction. It has been done.

  Thus, in this case, for example, the angle of the corner formed between the left side wall portion 40a and the left mounting flange portion 48a of the surrounding metal fitting 34 is reduced or increased by an external force, that is, those The surrounding metal fitting 34 is bent and deformed so that the left side wall portion 40a and the left side mounting flange portion 48a approach or separate from each other, and the left side wall portion 40a and the left side mounting flange portion 48a are intermediate portions in the length direction. This prevents bending deformation. Similarly, the surrounding metal fitting 34 is bent and deformed so that the right side wall portion 40b and the right side mounting flange portion 48b are close to or separated from each other, and each of the right side wall portion 40b and the right side mounting flange portion 48b is Bending deformation at the intermediate portion in the length direction is prevented. Further, bending of the overlapping portions of the bottom wall fitting 32 with the left and right mounting flange portions 48a and 48b is also prevented. As a result, not only the surrounding bracket 34 but also the entire strength of the second mounting bracket 14 is effectively increased.

  Further, in the first reinforcing metal fitting 52, the plate-like engaging portion 56 projects inward in the opposing direction of the left and right side wall portions 40a and 40b under the state of being fixed to the surrounding metal fitting 34 as described above. The rubber elastic body 15 disposed between the both side walls 40a and 40b is brought into contact with or opposed to the end face in the thickness direction. In other words, the plate-like engagement portions 56 of the first reinforcing metal fitting 52 that are welded and fixed to both sides in the width direction of the left side wall portion 40a and the first reinforcement that are welded and fixed to both sides in the width direction of the right side wall portion 40b. The plate-like engaging portions 56 of the metal fitting 52 are fixedly disposed on both sides in the thickness direction of the rubber elastic body 15 with the rubber elastic body 15 interposed therebetween. As a result, the plate-like engaging portions 56 of the first reinforcing metal fittings 52 are engaged with the rubber elastic body 15 in the direction of extraction from the U-shaped portion 44 of the second attachment metal fitting 14, or Thus, the rubber elastic body 15 can be effectively prevented from being pulled out of the U-shaped portion 44 by the plate-shaped engaging portion 56 of each first reinforcing bracket 52. Yes.

  Next, FIG. 6 and FIG. 7 show an automobile engine mount 60 as another example of the vibration isolator manufactured according to the method of the present invention in a front form and a top form, respectively. As is clear from these drawings, in the engine mount 60 according to this example, the first mounting bracket 12 and the second mounting bracket 14 are attached to the rubber elastic body 15 interposed therebetween. 1 to FIG. 1 except for the shape of the second reinforcing bracket 62 welded and fixed to the surrounding bracket 34 of the second mounting bracket 14 and the welding position to the surrounding bracket 34. The structure is substantially the same as the engine mount 10 of the previous example shown in FIG. In addition, about this example, about the member and site | part made into the same structure as the engine mount 10 of a previous example, the detailed description was abbreviate | omitted by attaching | subjecting the same code | symbol as FIG. 1 thru | or FIG.

  That is, in the engine mount 60, the first mounting bracket 12 includes the mounting portion 16 and the shaft portion 17. The shaft portion 17 is embedded in the rubber elastic body 15 and vulcanized and bonded. Yes. The first mounting bracket 12 and the rubber elastic body 15 constitute an integrally vulcanized molded product (30). The second mounting bracket 14 includes a bottom wall bracket 32 and an encircling bracket 34, and is configured by an assembly product in which they are overlapped and assembled.

  And here, as shown in FIG.8 and FIG.9, the 2nd reinforcement metal fitting 62 fixed by welding to the surrounding metal fitting 34 of the 2nd attachment metal fitting 14 and two oblique sides which connect them are shown. A plate-like reinforcing portion 64 made of a substantially trapezoidal metal flat plate, a plate-like engaging portion 66 made of a narrow metal plate having a long rectangular shape, and the plate-like reinforcing portion 64 and the plate-like engaging portion. And a plate-like connecting portion 68 that connects the two members 66 to each other. The plate-like connecting portion 68 is bent in a substantially S shape in the plate thickness direction, whereby the plate-like reinforcing portion 64 and the plate-like engaging portion 66 connected by the plate-like connecting portion 68. Are positioned so as to be adjacent to each other in the plate thickness direction and extend parallel to each other in a plan view of the second reinforcing metal fitting 62. The thickness and overall size of the second reinforcing bracket 62 are substantially the same as the thickness and overall size of the first reinforcing bracket 52 in the previous example.

  As shown in FIGS. 6 and 7, in the engine mount 60, each of the four of the second reinforcing brackets 62 configured as described above is provided on the left and right mounting flange portions 48a of the surrounding bracket 34. , 48b, the side surfaces of one of the two oblique sides of the plate-like reinforcing portion 64 are overlapped with both edge portions in the width direction on the upper surface of the wide portion on the front end side of each of the left and right side portions 40a, 40b is arranged in such a manner that the other side of the plate-shaped reinforcing portion 64 is superimposed on the both edges in the width direction on the outer surface of the outer surface 40b, and each mounting flange portion 48 or each side wall portion 40 of the surrounding metal fitting 34 is disposed. On the other hand, they are welded and fixed at the site where they are superposed. That is, two of the four second reinforcing brackets 62 connect the left side wall portion 40a and the left mounting flange portion 48a of the surrounding bracket 34 to each other in the width direction, and the remaining two The second reinforcing metal fitting 62 is welded to the surrounding metal fitting 34 at the plate-like reinforcing portion 64 so that the right side wall portion 40b and the right mounting flange portion 48b of the surrounding metal fitting 34 are connected to each other in the width direction. It has been done.

  Thus, even in the engine mount 60 of this example, as in the previous example, the left side wall portion 40a and the left side mounting flange portion 48a, or the right side wall portion 40b and the right side mounting flange portion 48b are close to or separated from each other. Thus, the left and right side wall portions 40a and 40b and the left and right side mounting flange portions 48a and 48b are prevented from being bent and deformed at intermediate portions in the length direction. Further, bending of the overlapping portions of the bottom wall fitting 32 with the left and right mounting flange portions 48a and 48b is also prevented. As a result, not only the surrounding bracket 34 but also the entire strength of the second mounting bracket 14 is effectively increased.

  In addition, here, the plate-like reinforcing portions 64 of the second reinforcing metal fittings 62 are respectively provided on the outer surface of the side wall portion 40 of the surrounding metal fitting 34 and the upper surface of the mounting flange portion 48 on the side surfaces located on both sides in the length direction. They are overlapped and fixed by welding. Therefore, for example, as in the previous example, the plate-like reinforcing portions 64 of the second reinforcing metal fittings 62 are respectively located on the side surfaces located on both sides in the width direction of the side wall portion 40 of the surrounding metal fitting 34 and the upper surfaces of the mounting flange portions 48. Unlike the case of being overlapped and fixed by welding, the strength of the surrounding metal fitting 34 that is enhanced by welding and fixing the plate-like reinforcing portion 64 is not affected by the joining strength of the second reinforcing metal fitting 62 to the surrounding metal fitting 34. It is made large enough by being made to depend greatly on the rigidity which the plate-shaped reinforcement part 64 has. As a result, the engine mount 60 of the present example can advantageously ensure a greater strength than the engine mount 10 of the previous example.

  Further, in the second reinforcing metal fitting 62, the plate-like engaging portion 66 projects inward in the facing direction of the left and right side wall portions 40a and 40b under the state of being fixed to the surrounding metal fitting 34 as described above. The rubber elastic body 15 disposed between the both side walls 40a and 40b is brought into contact with or opposed to the end face in the thickness direction. In other words, the plate-like engaging portions 66 of the second reinforcing metal fittings 62 that are welded and fixed to both sides in the width direction of the left side wall portion 40a and the second reinforcements that are welded and fixed to both sides of the right side wall portion 40b in the width direction. The plate-like engaging portions 66 of the metal fitting 62 are fixedly disposed on both sides in the thickness direction of the rubber elastic body 15 with the rubber elastic body 15 interposed therebetween. As a result, the plate-like engaging portions 66 of the second reinforcing metal fittings 62 are engaged with the rubber elastic body 15 in the direction of extraction from the U-shaped portion 44 of the second mounting metal fitting 14 or Thus, the rubber elastic body 15 can be effectively prevented from being pulled out of the U-shaped portion 44 by the plate-shaped engaging portion 66 of each second reinforcing metal fitting 62. Yes.

  Although not shown, even in the engine mount 60 having such a structure, the first mounting bracket 12 is attached to either the power unit or the body, By attaching the second mounting bracket 14 to either one, the power unit can be supported in a vibration-proof manner with respect to the body.

  By the way, as described above, one of the first reinforcing bracket 52 and the second reinforcing bracket 62 is welded and fixed to the second mounting bracket 14 so as to have different strengths. When the two types of engine mounts 10 and 60 are manufactured, the work is performed according to the following procedure, for example.

  That is, first, as shown in FIG. 4 and FIG. 5, four first reinforcing metal fittings 52 each having a substantially triangular plate-shaped reinforcing portion 54 and a substantially trapezoidal plate as shown in FIG. 8 and FIG. Four of the second reinforcing fittings 62 having the shape reinforcing portions 64 are respectively formed and prepared. The first reinforcing bracket 52 can be easily obtained by, for example, performing a known punching process by press molding on a metal flat plate using a punch and a die having a cutting edge having the same shape as the outer shape. can get. In addition, the second reinforcing metal fitting 62 is, for example, a punched product obtained by performing a known punching process by press molding on a metal flat plate using a punch and a die having a cutting edge having the same shape as the outer shape. This plate-shaped connecting portion 68 is easily obtained by performing a known bending process by press molding only once.

  In addition, after preparing the first and second two types of reinforcing metal fittings 52 and 62, or simultaneously with or prior thereto, that is, while preparing the two types of reinforcing metal fittings 52 and 62, a predetermined one piece Alternatively, the two surrounding metal fittings 34 and the two bottom wall metal fittings 32 are formed and prepared by subjecting a plurality of metal flat plates to punching or bending by known press forming. Is done.

  Thereafter, one of the two surrounding metal fittings 34 thus prepared and the four first reinforcing metal fittings 52 are used, and as shown in FIGS. In addition, the edge portion of one surface in the thickness direction and one side surface are overlapped with the side surfaces on both sides in the width direction of the side wall portions 40 of the U-shaped portion 44 of the surrounding metal fitting 34 and the upper surfaces of the mounting flange portions 48. At the same time, the plate-like engaging portion 56 is positioned so as to protrude inside the U-shaped portion 44. And in such arrangement | positioning state, each 1st reinforcement metal fitting 52 and the surrounding metal fitting 34 are welded in mutual superimposition site | parts. Thus, the four first reinforcing metal fittings 52 are integrally joined to the surrounding metal fitting 34, and the first reinforcing metal fitting 34 is reinforced by the four first reinforcing metal fittings 52. The integrally joined product 70 is manufactured.

  Separately, the remaining one of the two surrounding metal fittings 34 and the four second reinforcing metal fittings 62 are used, and each second reinforcing metal fitting is used as shown in FIGS. 62 are overlapped on both side surfaces of the outer surface of each side wall portion 40 of the U-shaped portion 44 of the surrounding metal fitting 34 and the upper surface of each mounting flange portion 48 on the two side surfaces, and the plate-like engagement portion 66 is positioned so as to protrude inside the U-shaped portion 44. And in such arrangement | positioning state, each 2nd reinforcement metal fitting 62 and the surrounding metal fitting 34 are welded in mutual superimposition site | parts. Then, the four second reinforcing metal fittings 62 are integrally joined to the surrounding metal fitting 34, and the second reinforcing metal fitting 34 is reinforced by the four second reinforcing metal fittings 62. The integrally joined product 72 is manufactured. The manufacture of the second integrally joined product 72 may be performed before, after, or simultaneously with the manufacture of the first integrally joined product 70.

  In addition, while the first integrally joined product 70 and the second integrally joined product 72 are manufactured, the two first fittings 12 are formed by known press molding or the like. Thereafter, mold molding such as known insert injection molding is performed using the first mounting bracket 12 as an insert, and vulcanization bonding is performed in a state where the shaft portion 17 of the first mounting bracket 12 is embedded. Two rubber elastic bodies 15, that is, two integrally vulcanized molded products 30 including the first mounting bracket 12 and the rubber elastic body 15 are formed.

  Then, as shown in FIG. 14, one of the two integrally vulcanized molded products 30 is placed on the U-shaped positioning portion 36 of one of the two bottom wall fittings 32. Placed. At this time, the two positioning projections 26, 26 projecting from the base bottom surface 24 of the rubber elastic body 15 are positioned so as to sandwich the U-shaped positioning portion 36 from both sides in the length direction of the bottom wall fitting 32. Thus, the position of the rubber elastic body 15 placed on the bottom wall fitting 32 is positioned at a preset position. The formation of the first mounting bracket 12, the formation of the integrally vulcanized molded product 30, and the placement of the integrally vulcanized molded product 30 on the bottom wall fitting 32 are performed by the first and second integrally joined products 70 and 72. It may be before, after, or at the same time.

  Thereafter, the first integrally joined product 70 in which the four first reinforcing metal fittings 52 are welded and fixed to the surrounding metal fitting 34 is compared with the integrally vulcanized molded product 30 placed on the bottom wall metal fitting 32 from above. Assembled. Specifically, the rubber elastic body 15 is fitted into the inside of the U-shaped portion 44 of the surrounding bracket 34 from the lower side, and the left and right mounting flange portions 48a and 48b of the surrounding bracket 34 are connected to the bottom wall bracket 32. The first integrally joined product 70 is assembled to the integrally vulcanized molded product 30 and the bottom wall fitting 32 so as to overlap the left and right end side portions from above.

  Thereby, as shown in FIG. 1, the rubber elastic body 15 is non-adhered over the entire circumference between the U-shaped portion 44 of the surrounding metal fitting 34 and the U-shaped positioning portion 36 of the bottom wall metal fitting 32. Surrounded by. At this time, the two shoulder portions 22a and 22b located on the left and right sides of the rubber elastic body 15 are positioned in contact with the left and right step portions 50a and 50b of the surrounding bracket 34, and the first reinforcing bracket 52 The plate-like engaging portions 54 are positioned so as to be engageable with the end faces on both sides in the thickness direction of the rubber elastic body 15.

  In such a state, mounting bolts (not shown) are inserted into bolt holes 38 and 46 provided in the mounting flange portions 48 of the bottom wall fitting 32 and the surrounding fitting 34 and fixed to the power unit or the body. As a result, the rubber elastic body 15 is sandwiched and held between the ceiling wall portion 42 and the two step portions 50a and 50b of the surrounding metal fitting 34 and the bottom wall metal fitting 32. Thus, the second mounting bracket 14 including the first integrated joint 70 and the first mounting bracket 12 are connected to each other by the rubber elastic body 15 interposed therebetween, and the engine mount 10 Will be formed.

  On the other hand, as shown in FIG. 15, the remaining one of the two integrally vulcanized molded products 30 is placed on the U-shaped positioning portion 36 in the remaining one of the two bottom wall fittings 32. A single thing is mounted in the positioning state similarly to the above.

  Thereafter, the same operation as that for forming the engine mount 10 is performed, and the second integrally joined product 72 formed by welding and fixing the four second reinforcing fittings 62 to the surrounding fitting 34 is formed on the bottom wall fitting 32. The mounted integrally vulcanized molded product 30 is assembled from above, and in this assembled state, it is inserted into the bolt holes 38 and 46 of the mounting flange portions 48 of the bottom wall fitting 32 and the surrounding fitting 34. A fixed mounting bolt (not shown) is fixed to the power unit or the body. As a result, the second mounting bracket 14 including the second integrally joined product 72 and the first mounting bracket 12 are connected to each other by the rubber elastic body 15 interposed therebetween, and the engine mount is mounted. An engine mount 60 as shown in FIG. 6 having a strength greater than 10 will be formed.

  Thus, in this embodiment, in order to manufacture two types of engine mounts 10 and 60 having different strengths, two types of reinforcing brackets 52 and 62 having different shapes are prepared, but such reinforcing brackets are also provided. Except for 52 and 62, common parts are used. Thus, in the process of manufacturing the two types of target engine mounts 10 and 60, the labor and cost of manufacturing a large number of types of parts dedicated to the engine mounts 10 and 60 can be advantageously omitted.

  Moreover, the two types of reinforcing metal fittings 52 and 62 used exclusively for the two types of engine mounts 10 and 60 are simply obtained by performing a stamping process by a known press molding on a metal flat plate, or such a punching. The workpiece obtained by processing can be easily obtained by a simple operation of performing only one bending process by known press molding.

  Therefore, according to this embodiment as described above, the two types of engine mounts 10 and 60 having different strengths can be manufactured very easily and at low cost.

  In the present embodiment, the first and second types of reinforcing metal fittings 52 and 62 both have a left side wall portion 40a and a left side mounting flange portion with respect to the surrounding metal fitting 34 of the second attachment metal fitting 14. 48a or the right side wall part 40b and the right side mounting flange part 48b are welded and fixed in a state where they are connected to each other. As a result, the strength of the second mounting bracket 14, and thus the engine mounts 10 and 60, can be advantageously increased in a relatively simple structure.

  Further, in the present embodiment, the plate-shaped engaging portions 56 and 66 are integrally formed on both of the first and second types of reinforcing metal fittings 52 and 62, and the reinforcing metal fittings 52 and 62 are secondly attached. The thickness of the rubber elastic body 15 in which the plate-like engaging portions 56 and 66 are fitted inside the U-shaped portion 44 of the surrounding metal fitting 34 is fixed to the surrounding metal fitting 34 of the mounting fitting 14 by welding. Thus, the rubber elastic body 15 can be effectively prevented from being pulled out from the U-shaped portion 44. As a result, in any of the two types of engine mounts 10 and 60, the desired vibration isolation performance can be stably exhibited.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the above-described embodiment, first and second types of reinforcing metal fittings 52 and 62 having different shapes are prepared, and these reinforcing metal fittings 52 and 62 are mutually connected to the surrounding metal fitting 34. By being welded to different positions, the strength of the surrounding metal fitting 34, and consequently the engine mounts 10 and 60, is configured to be different from each other. However, as these two types of reinforcing metal fittings 52 and 62, for example, Those having different strengths depending on the thickness, shape, material, etc. are prepared, and they are welded and fixed to the surrounding metal fitting 34 at the same position or different positions. It is also possible to make the overall strength of the (second mounting bracket 14) and thus the engine mounts 10 and 60 different from each other.

  Needless to say, the specific shapes of the reinforcing metal fittings 52 and 62 are not limited to the illustrated triangular shape or trapezoidal shape. Moreover, as long as they have different strengths, they may have the same shape.

  Furthermore, in the above-described embodiment, four each of the reinforcing metal fittings 52 and 62 are used, and one reinforcing metal fitting 52 and 62 is positioned on each side of the left and right side wall portions 40a and 40b in the width direction with respect to the surrounding metal fitting 34. For example, the surrounding metal fittings 52 and 62 are positioned only on one side in the width direction of each side wall portion 40 or in the intermediate portion in the width direction. 34 may be fixed by welding. And the number of each reinforcement metal fittings 52 and 62 can be changed suitably according to the intensity | strength etc. which are requested | required of the 2nd attachment metal fitting 14 or the engine mounts 10 and 60. FIG.

  Furthermore, the shapes and positions of the plate-like engaging portions 56 and 66 provided in the reinforcing metal fittings 52 and 62 are not limited to those shown as examples. Further, such plate-like engaging portions 56 and 66 are not essential in the present invention, and are omitted in some or all of the plurality of reinforcing metal fittings 52 and 62 fixed to the surrounding metal fitting 34 by welding. It can be done.

  Furthermore, when a plurality of reinforcing brackets are welded and fixed to the second mounting bracket of one vibration isolator, it is not always necessary that the plurality of reinforcing brackets have the same shape.

  Moreover, in the said embodiment, before the surrounding metal fitting 34 of the 2nd attachment metal fitting 14 is assembled | attached to the integral vulcanization molded product 30 of the 1st attachment metal fitting 12 and the rubber elastic body 15, with respect to the enclosure metal fitting 34, The first reinforcing metal fitting 52 and the second reinforcing metal fitting 62 are fixed by welding. After the enclosure metal fitting 34 is assembled to the integrally vulcanized molded product 30, the first reinforcement metal fitting 52 and the second reinforcement metal fitting 62 are fixed to the surrounding metal fitting 34. The metal fitting 52 and the second reinforcing metal fitting 62 can be fixed by welding.

  In addition, in the said embodiment, although the specific example of what applied this invention to the manufacturing method of the engine mount for motor vehicles was shown, this invention is a manufacturing method of the vibration isolator for motor vehicles other than an engine mount, Of course, the present invention can be advantageously applied to any method of manufacturing a vibration isolator other than that for automobiles.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is front explanatory drawing which shows an example of the engine mount manufactured according to this invention technique. FIG. 2 is an explanatory plan view of the engine mount shown in FIG. 1. FIG. 3 is an explanatory view taken along the line III-III in FIG. 2. It is front explanatory drawing which shows the reinforcement metal fitting fixed to the 2nd metal fitting of the engine mount shown by FIG. FIG. 5 is an explanatory plan view of the reinforcing metal fitting shown in FIG. 4. It is front explanatory drawing which shows another example of the engine mount manufactured according to this invention method. FIG. 7 is an explanatory plan view of the engine mount shown in FIG. 6. It is front explanatory drawing which shows the reinforcement metal fitting fixed to the 2nd attachment metal fitting of the engine mount shown by FIG. FIG. 9 is an explanatory plan view of the reinforcing metal fitting shown in FIG. 8. It is front explanatory drawing which shows the integrally joined product by which a reinforcement metal fitting is weld-fixed to the 2nd attachment metal fitting which the engine mount shown by FIG. 1 has. It is a plane explanatory view of the integrally joined product shown in FIG. It is front explanatory drawing which shows the integrally joined product by which a reinforcement metal fitting is weld-fixed to the 2nd attachment metal fitting which the engine mount shown by FIG. 6 has. FIG. 13 is an explanatory plan view of the integrally joined product shown in FIG. 12. FIG. 2 is an explanatory view showing an example of a process when manufacturing the engine mount shown in FIG. 1 according to the method of the present invention, with respect to a rubber elastic body of an integrally vulcanized molded product placed on a bottom wall metal fitting. The state where the integrally joined product formed by welding the reinforcing metal fitting is assembled is shown. FIG. 15 is an explanatory diagram showing an example of a process for manufacturing the engine mount shown in FIG. 6 according to the method of the present invention, corresponding to FIG. 14.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,60 Engine mount 12 1st attachment metal fitting 14 2nd attachment metal fitting 15 Rubber elastic body 30 Integrated vulcanization molded product 32 Bottom wall metal fitting 34 Enclosure metal fitting 44 U-shaped part 52 First reinforcement metal fitting 54, 64 Plate-like reinforcement Portions 56, 66 Plate-like engaging portion 62 Second reinforcing bracket 70 First integrally joined product 72 Second integrally joined product

Claims (2)

A first mounting bracket and a second mounting bracket that are spaced apart from each other, and a rubber elastic body that is interposed between the first mounting bracket and the second mounting bracket and elastically connects them. And the rubber elastic body has a block shape having a predetermined height in the main vibration input direction, and the first mounting bracket is partly attached to the rubber elastic body. The second mounting bracket is attached to the bottom surface of the base of the rubber elastic body while being embedded in a direction perpendicular to both the height direction and the left-right direction. A surrounding metal fitting formed to bend so as to surround both the left and right side surfaces and the front end surface, and a bottom wall fitting having at least a shape portion corresponding to the bottom surface of the base of the rubber elastic body. The bottom wall bracket is against the rubber elastic body. In the unbonded, a method of manufacturing a mutually cooperate vibration damping device of the rubber elastic body configured to surround the entire circumference,
The first mounting bracket is partially vulcanized and bonded to the rubber elastic body so as to extend in a direction perpendicular to both the height direction and the left-right direction. A step of preparing an integrally vulcanized molded product of the first mounting bracket and the rubber elastic body,
Enclosing the rubber elastic body of the prepared integrally vulcanized molded article in a non-adhesive manner with the surrounding metal fitting and the bottom wall metal fitting of the second mounting metal fitting over the entire circumference;
Preparing a plurality of types of reinforcing metal fittings that reinforce the second mounting metal fittings with different shapes or strengths;
Selecting any one of the prepared plurality of types of reinforcing metal fittings, and welding and fixing the selected reinforcing metal fittings to the second attachment metal fittings;
Only contains, and an engaging portion is provided on the reinforcement bracket engagement portion, the rubber elastic body positioned in the extending direction on both sides of the embedded portion to the rubber elastic body of the first mounting member In such a state that the reinforcement fitting extends the engagement portion toward the inner side of the surrounding fitting in the second mounting fitting so that it can be engaged with any one of the end faces of the second attachment fitting. A method of manufacturing a vibration isolator, wherein the vibration isolator is fixed to a second mounting bracket by welding .   Two side wall portions arranged opposite to each other so that the surrounding metal fitting of the second mounting metal fitting is located on both the left and right sides with the rubber elastic body sandwiched between the rubber elastic bodies. The two side wall portions are configured to include an outer flange portion that integrally extends outward from the portion corresponding to the base portion of the rubber elastic body in the opposite direction, while the reinforcement 2. The metal fitting according to claim 1, wherein the metal fitting is constituted by a plate metal fitting, and is welded and fixed to the side wall portion and the outer flange portion of the surrounding metal fitting in a state where they are connected to each other. A method of manufacturing a vibration isolator.

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