JP2012047231A - Vibration control device and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device that can suppress the formation of burrs when, in particular, insert-molding a vibration isolation leg at a bracket member, and can secure a stopper function by the vibration isolation leg, and to provide a method of manufacturing the vibration control device, concerning the vibration control device and its manufacturing method.SOLUTION: A resin molding metal mold 400 can rigidly press both sides 402e, 53a since the second pressing face 402e presses the seal face 53a toward a mold-fastening direction. By this arrangement, resin materials injected into a cavity C are made to hardly enter between both sides 402e, 53a, and the formation of the burrs can be suppressed. Furthermore, even if the resin materials enter between both sides 402e, 53a, a stopper face is protruded from the seal face 53a by an amount of a step 53c, thereby a stroke (compression margin) of the stopper face can be secured, and the stopper function can be exhibited.

Description

  The present invention relates to an anti-vibration device having a structure in which an anti-vibration leg portion made of a rubber-like elastic body is insert-molded into a bracket member made of a resin material, and a method for manufacturing the anti-vibration device, and particularly suppresses the generation of burrs during insert molding. In addition, the present invention relates to a vibration isolator capable of ensuring a stopper function by the vibration isolator leg and a method for manufacturing the vibration isolator.

  As an example of the vibration isolator, for example, an insertion hole is provided in a bracket member attached to the vehicle body side, and an inner cylinder member inserted in the insertion hole is used as a vibration source (for example, an engine, a motor, a transmission, etc. In addition, a structure is known in which the inner peripheral side of the insertion hole and the outer peripheral side of the inner cylinder member are connected by a vibration-proof leg portion made of a rubber-like elastic body.

  In recent years, it has been attempted to construct the bracket member from a resin material for the purpose of reducing the weight and cost. For example, in Patent Document 1, a bracket member is made of a resin material, and a metal plate is disposed on an inner peripheral surface of a mount mounting hole (insertion hole) provided in the bracket member. A technique for fixing a main rubber elastic body to an inner peripheral surface of a mount mounting hole by bonding an elastic body (vibration-proof leg portion) is disclosed. In addition to the technique for fixing the metal plate to the bracket member by bonding as described above, a technique for fixing the metal plate by a mechanical engagement structure is also disclosed.

JP-A-9-170634 (FIGS. 1-5, paragraph [0007], etc.)

  However, in the conventional vibration isolator described above, when the metal plate is fixed by a mechanical engagement structure, a structure in which a part of the inner peripheral surface of the insertion hole of the bracket member is projected toward the vibration isolating leg portion. And since the overhang | projection part becomes an undercut shape, the structure of the resin molding die for shape | molding a bracket member becomes complicated.

  On the other hand, as a result of earnest examination, the present applicant embeds an outer member on the other end side of the anti-vibration leg portion, and insert-molds the other end side of the anti-vibration leg portion into the bracket member together with the outer member. The present inventors have found that the structure of the resin molding die can be simplified while suppressing the other end side of the vibration isolating leg from coming out of the bracket member (not known at the time of this application).

  Here, the structure of the vibration isolator and the resin mold will be described with reference to FIGS. 16 and 17. FIG. 16 is a perspective view of the vibration isolator 200.

  As shown in FIG. 16, the vibration isolator 200 includes a bracket member 230 made of a resin material, an inner cylinder member 240 inserted and disposed in an insertion hole 231 formed in the bracket member 230, A pair of anti-vibration legs 250, each of which is connected to the cylindrical member 230 and is made of a rubber-like elastic body, the other end being insert-molded on the inner peripheral side of the insertion hole 231 of the bracket member 230, and the pair of anti-vibration legs 250 It mainly includes a pair of outer members 260 (see FIG. 17) embedded in the other end side of the swing leg portion 250. A covering rubber portion 253 that covers the outer member 260 is formed on the other end side of the vibration isolation leg portion 250. The covering rubber portion 253 is a portion that functions as a stopper surface, and protrudes from the outer surface of the bracket member 230 toward the axial direction of the inner cylinder member 240. In other words, the displacement of the mating part is restricted when the mating part is brought into contact with the covering rubber part 253.

  FIG. 17 is a cross-sectional view of the resin-molding mold 2400 that has been clamped, and corresponds to a step view taken along line XVII-XVII in FIG. The vibration isolator 200 is manufactured by clamping the resin molding die 2400 provided with the inner cylinder member 240 and the vibration isolation legs 250 in the axial direction of the inner cylinder member 240 (the vertical direction in FIG. 17), and then the cavity C This is performed by injecting a resin material into the inside and solidifying it, and insert-molding the vibration-proof leg portion 250 into the bracket member 230. The resin molding die 2400 includes a cavity C into which a resin material is injected and an overlaid rubber portion by the abutment surface portion 2400a coming into contact with a vertical wall 253a connected to the stopper surface (upper side surface in FIG. 17) of the overlaid rubber portion 253. A space S in which 253 stopper surfaces are stored is partitioned.

  In this case, if the close contact between the contact surface portion 2400a of the resin molding die 2400 and the vertical wall 253a of the covering rubber portion 253 is weak, the resin material injected into the cavity C is separated from the contact surface portion 2400a and the vertical wall 253a. It penetrates between and becomes burr. Since such burrs are made of a resin material and are hard, they hinder the function of the covering rubber portion 253 as a stopper surface. Therefore, in order to ensure the stopper function, it is necessary to suppress the occurrence of burrs, and high dimensional accuracy is required for the contact surface portion 2400a of the resin molding die 2400 and the vertical wall 253a of the vibration isolation leg portion 253.

  The present invention has been made in view of the above-described circumstances, and suppresses generation of burrs during insert molding in a structure in which a vibration-proof leg portion made of a rubber-like elastic body is insert-molded into a bracket member made of a resin material. An object of the present invention is to provide a vibration isolator and a method for manufacturing the vibration isolator capable of ensuring a stopper function by the anti-vibration legs.

Means for Solving the Problems and Effects of the Invention

  According to the vibration isolator of claim 1, the protruding rubber portion protruding from the outer surface of the bracket member is connected to the flat sealing surface portion located on the outer edge side and the sealing surface portion via the step. And a stopper surface portion that protrudes more than the seal surface portion, and the pressing surface portion of the resin molding die presses the sealing surface portion in the protruding rubber portion of the first molded body, and the cavity into which the resin material is injected and the protruding rubber Since it is insert-molded on the inner peripheral side of the insertion hole of the bracket member in a state of partitioning the space in which the stopper surface portion of the part is accommodated, the occurrence of burrs in the manufacturing process of the vibration isolator is suppressed. There is an effect that the stopper function can be secured.

  That is, the sealing surface portion of the protruding rubber portion is formed in a flat surface shape, and the pressing surface portion of the resin molding die is pressed against the sealing surface portion, so that the pressing surface portion and the sealing surface portion can be firmly adhered. Therefore, there is an effect that the resin material injected into the cavity is prevented from entering between the pressing surface portion and the sealing surface portion, and generation of burrs during insert molding is suppressed accordingly.

  In addition, if the close contact between the pressing surface portion and the sealing surface portion can be strengthened in this way, the dimensional accuracy between the pressing surface portion of the resin molding die and the sealing surface portion of the protruding rubber portion can be moderated accordingly. Therefore, the manufacturing cost of the resin molding die and the rubber vulcanization die for manufacturing the vibration isolator can be reduced.

  Furthermore, since the stopper surface portion of the protruding rubber portion is connected to the seal surface portion through a step and protrudes from the seal surface portion by the amount corresponding to the step, the resin material injected into the cavity is pressed against the pressing surface portion and the seal surface portion. Even when the intruded resin material becomes a burr, the stopper surface of the stopper surface portion can be separated from the burr by a level difference. Therefore, even if a burr occurs in the manufacturing process of the vibration isolator, there is an effect that the stopper function by the stopper surface portion can be ensured.

  According to the method for manufacturing a vibration isolator according to claim 2, in the rubber vulcanization step, after the inner cylinder member and the outer member are installed in the cavity of the rubber vulcanization mold, the rubber-like elastic body is placed in the cavity. Is injected and vulcanized to form a first molded body in which one end side of the pair of anti-vibration legs is vulcanized and bonded to the inner cylinder member. Next, in the resin molding step, the first molded body molded by the rubber vulcanization step is placed in the cavity of the resin molding die, and the resin material is injected into the cavity and solidified, whereby the first The molded body is insert-molded into the bracket member.

  In this case, the first molded body molded by the rubber vulcanization process is such that the protruding rubber portion is connected to the flat seal surface portion located on the outer edge side, and the seal surface portion via the step, and the amount corresponding to the step. A cavity into which the resin material is injected by pressing the sealing surface part of the protruding rubber part of the first molded body with the pressing surface part of the resin molding die in the resin molding step. And the space in which the stopper surface portion in the protruding rubber portion of the first molded body is accommodated, there is an effect that the generation of burrs can be suppressed and the stopper function can be secured.

  That is, the sealing surface portion of the protruding rubber portion is formed in a flat surface shape, and the pressing surface portion of the resin molding die is pressed against the sealing surface portion, so that the pressing surface portion and the sealing surface portion can be firmly adhered. Therefore, the resin material injected into the cavity can be prevented from entering between the pressing surface portion and the seal surface portion, and the generation of burrs during insert molding can be suppressed accordingly.

  In addition, if the close contact between the pressing surface portion and the sealing surface portion can be strengthened in this way, the dimensional accuracy between the pressing surface portion of the resin molding die and the sealing surface portion of the protruding rubber portion of the first molded body is increased accordingly. Since it can be made loose, there is an effect that the manufacturing cost of the resin molding die and the rubber vulcanizing die can be reduced.

  Furthermore, since the stopper surface portion of the protruding rubber portion is connected to the seal surface portion through a step and protrudes from the seal surface portion by the amount corresponding to the step, the resin material injected into the cavity is pressed against the pressing surface portion and the seal surface portion. Even when the intruded resin material becomes a burr, the stopper surface of the stopper surface portion can be separated from the burr by a level difference. Therefore, even if burrs are generated, there is an effect that the stroke (compression allowance) of the stopper surface portion can be secured and the stopper function can be exhibited.

  According to the method for manufacturing a vibration isolator according to claim 3, in addition to the effect of the method for manufacturing a vibration isolator according to claim 2, the rubber vulcanization step includes a rubber vulcanization in which the outer member is installed together with the inner cylinder member A rubber-like elastic body is injected into the mold cavity and vulcanized to connect one end side of the pair of vibration isolation legs to the outer peripheral surface of the inner cylinder member and the other end side of the pair of vibration isolation legs. The first molded body having the outer member embedded therein is molded, and in the resin molding step, the pressing surface portion of the resin molding die is the sealing surface portion of the protruding rubber portion and presses the region that overlaps at least a part of the outer member. Therefore, the sealing surface part pressed by the pressing surface part can be supported by the outer member comprised from a metal material from the back side. As a result, the adhesion between the pressing surface portion and the sealing surface portion can be further strengthened, so that the resin material injected into the cavity can be prevented from entering between the pressing surface portion and the sealing surface portion. There is an effect that the generation of burrs during molding can be more reliably suppressed.

  According to the third aspect of the present invention, in the rubber vulcanization process, the outer member made of a metal material is embedded in the other end side of the vibration isolation leg part, and the other end side of the vibration isolation leg part is a bracket in the resin molding process. Since at least a part of the outer member is engaged with the bracket member by insert molding to the member, it is possible to manufacture a vibration isolator capable of suppressing the other end side of the vibration isolating leg portion from being extracted from the bracket member. There is an effect that can be done.

  According to the method for manufacturing a vibration isolator according to claim 4, in addition to the effect exhibited by the method for manufacturing a vibration isolator according to claim 2 or 3, the resin molding die used in the resin molding step is a pressing surface portion. Since there is a predetermined gap between the vertical wall connected to the step and the step between the seal surface portion and the stopper surface portion of the first molded body, the surplus of the rubber-like elastic body that is pushed out when the seal surface portion is pressed by the press surface portion Meat can be released and absorbed in the gap between the vertical wall and the step. Thus, by letting out the surplus, there is an effect that the pressing surface portion and the seal surface portion can be brought into close contact with each other without being obstructed by the surplus. As a result, since the resin material injected into the cavity can be prevented from entering between the pressing surface portion and the seal surface portion, the generation of burrs during insert molding can be more reliably suppressed.

It is a perspective view of the vibration isolator in 1st Embodiment of this invention. (A) is a front view of a vibration isolator, (b) is a side view of a vibration isolator. (A) is a perspective view of an outer member, (b) is a rear view of an outer member. (A) is sectional drawing of the outer member in the IVa-IVa line | wire of FIG.3 (b), (b) is sectional drawing of the outer member in the IVb-IVb line | wire of FIG.3 (b). It is a perspective view of a 1st molded object. (A) is a front view of a 1st molded object, (b) is a side view of a 1st molded object. (A) is sectional drawing of the 1st molded object in the VIIa-VIIa line | wire of Fig.6 (a), (b) is sectional drawing of the 1st molded object in the VIIb-VIIb line | wire of FIG.6 (b). is there. It is sectional drawing of the 1st molded object in the VIII-VIII line of Fig.6 (a). FIG. 3 is a cross-sectional view of a rubber vulcanization mold in which an inner cylinder member and an outer member are set and clamped. It is sectional drawing of the resin mold which the 1st molded object was set and clamped. It is sectional drawing of the resin mold which the 1st molded object was set and clamped. It is sectional drawing of the resin mold which the 1st molded object was set and clamped. It is a fragmentary sectional view of a vibration isolator. It is a fragmentary sectional view of a vibration isolator. (A) is sectional drawing of the outer member in 2nd Embodiment, (b) is sectional drawing of the outer member in 3rd Embodiment. It is a perspective view of the conventional vibration isolator. It is sectional drawing of the conventional resin molding metal mold | die clamped.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the whole structure of the vibration isolator 1 is demonstrated with reference to FIG.1 and FIG.2. FIG. 1 is a perspective view of a vibration isolator 1 according to a first embodiment of the present invention, FIG. 2 (a) is a front view of the vibration isolator 1, and FIG. 2 (b) is a vibration isolator. 1 is a side view of FIG. 1 and 2, arrows F and B indicate the vehicle longitudinal direction, arrows L and R indicate the vehicle lateral direction, and arrows U and D indicate the vehicle vertical direction.

  As shown in FIGS. 1 and 2, the vibration isolator 1 supports and fixes a vibration source (not shown) of an automobile so that vibration generated from the vibration source is not transmitted to a vehicle body (not shown). It is composed of a cylindrical short shaft mounting bracket 11 and a long shaft mounting bracket 12 attached to the vehicle body side, and vulcanized and bonded to the outer peripheral surfaces of both the mounting brackets 11 and 12 and a rubber-like elastic body. Elastic members 21, 22, a bracket member 30 having a press-fit hole into which both the elastic bodies 21, 22 are press-fitted and made of a resin material, and an insertion hole 31 formed in the bracket member 30. An inner cylinder member 40 that is inserted and arranged on the vibration source side, a pair of vibration isolation legs 50 that are connected to the inner cylinder member 40 at one end side and that are made of a rubber-like elastic body, and the pair of anti-vibration parts Other swing legs 50 Side is composed mainly comprises a pair of outer member 60 (see FIG. 7) which is engaged to the bracket member 40 while being connected, respectively, to.

  In this embodiment, the vibration source is a motor, but other examples include an engine and a transmission.

  The short shaft mounting bracket 11 and the long shaft mounting bracket 12 are made of a steel material and are mounted on the vehicle body side. Both the mounting brackets 11 and 12 are formed in a cylindrical shape having a through-hole, and a bolt (not shown) is inserted into the through-hole. Are attached to the vehicle body side.

  The bracket member 30 is made of a resin material as a substantially rectangular frame-like body, and has a press-fitting hole and an insertion hole 31 penetrating in the thickness direction. The fittings 11 and 12 having the elastic bodies 21 and 22 vulcanized and bonded to the outer peripheral surface are press-fitted and held in the press-fitting holes. The inner cylinder member 40 is inserted into the insertion hole 31. The inner peripheral surface of the insertion hole 31 also functions as a stopper portion that receives the inner cylinder member 40 when a large displacement is input and restricts the displacement.

  At the upper end and the lower end of the bracket member 30, a plurality of lightening holes 32 are formed penetrating in the thickness direction. The press-fitting hole, the insertion hole 31 and the lightening hole 32 have a tapered inner periphery whose inner diameter is enlarged toward the opening side, and the shaft of the inner cylinder member 40 and a hole 63a of the outer member 60 described later. It is formed parallel to the direction of the heart. Therefore, the mold release property from the resin molding die 400 (see FIG. 10) is ensured.

  The inner cylinder member 40 is formed from an aluminum alloy into a cylindrical shape having an elliptical cross section having a through hole. The inner cylinder member 40 is fastened and fixed to the vibration source side via a bolt (not shown) inserted through the through hole. The pair of anti-vibration legs 50 are composed of rubber-like elastic bodies, and are members for suppressing the vibration generated on the vibration source side from being transmitted to the vehicle body side, and one end side is the outer peripheral surface of the inner cylinder member 40. Are connected to the inner peripheral surface of the insertion hole 31 in the bracket member 30.

  The pair of anti-vibration legs 50 are connected to the inner circumferential surface of the insertion hole 31 in the vehicle front-rear direction, and between the upper side and the lower side (the vehicle upper side and the lower side) of the insertion hole 31. A space is formed. Therefore, in the vibration isolation leg portion 50, the vertical spring constant when the inner cylinder member 40 is displaced in the vehicle vertical direction is made smaller than the horizontal spring constant when the inner cylinder member 40 is displaced in the vehicle left-right direction. Yes.

  On the other end side of the anti-vibration leg portion 50, from the outer surfaces (the left side surface and the right side surface in FIG. 2B) that are the front surface and the back surface of the bracket member 30, the axial direction of the inner cylinder member 40 (the left and right direction in FIG. 2). The second wall covering rubber 53 protruding toward the line is continuous. The second wall covering rubber 53 includes a seal surface portion 53a and a stopper surface portion 53b. The stopper surface portion 53b is connected to the seal surface portion 53a via a step 53c, and protrudes in the axial direction of the inner cylinder member 40 from the seal surface portion 53a by the amount of the step 53c. That is, the stopper surface portion 53b has a higher protruding height from the outer surface of the bracket member 30 than the seal surface portion 53a. When the counterpart component 500 (see FIG. 13) fastened and fixed to the inner cylinder member 40 is relatively displaced when a large displacement is input, the stopper surface portion 53b contacts the counterpart component and functions as a stopper portion that regulates the displacement. .

  Next, the outer member 60 will be described with reference to FIGS. 3 and 4. FIG. 3A is a perspective view of the outer member 60, and FIG. 3B is a rear view of the outer member 60. 4A is a cross-sectional view of the outer member 60 taken along line IVa-IVa in FIG. 3B, and FIG. 4B is a cross-sectional view of the outer member 60 taken along line IVb-IVb in FIG. FIG.

  As shown in FIGS. 3 and 4, the outer member 60 is a member formed in a container shape by drawing a flat plate made of a metal material by a press machine, and a pair of protective members. It is embedded in the other end side of the swing leg 50 and engaged with the bracket member 30. The outer member 60 has a substrate portion 61 formed in a rectangular shape when viewed from the back, and two opposite sides (the upper side and the lower side in FIG. 3B) that are the outer edges of the substrate portion 61 and the rear side (FIG. 3 ( b) A pair of first wall portions 62 extending toward the front side of the paper) and the ends of the pair of first wall portions 61 extending from the remaining two sides of the substrate portion 61 toward the back side. And a pair of second wall parts 63 that connect the parts.

  The substrate portion 61 is formed to be convex toward the back side and to be curved in an arc shape having the axis L1 (see FIG. 4A). That is, in FIG. 4A, the substrate portion 61 is formed in a shape in which a part of a side wall of a cylinder whose axis L1 extends in a direction perpendicular to the paper surface is cut off. A through-hole 61 a having a substantially rectangular shape when viewed from the back is formed in the center of the plate surface of the substrate portion 61.

  The through-hole 61a is disposed at the center between the pair of second wall portions 63, but is located on one side of the pair of first wall portions 62 with respect to the pair of first wall portions 62 (see FIG. 3 (b) and FIG. 4 (a) lower side). Therefore, in FIG. 4A, the central angle θa of the arc formed by the substrate portion 61 on the upper side of the through hole 61a is larger than the central angle θb of the arc formed by the substrate portion 61 on the lower side of the through hole 61a. Has also been enlarged.

  The first wall portion 62 is a flat plate-like portion for mainly restricting movement of the outer member 60 with respect to the bracket member 30 in the vehicle longitudinal direction (arrows F and B directions) and the vehicle vertical direction (arrows U and D). Yes (see FIG. 12), and a pair is arranged opposite to each other, and the distance between the pair of opposing faces is formed so as to widen away from the back side of the substrate portion 61 (see FIG. 4 (a)). The pair of first wall portions 62 are formed in the same shape.

  The second wall portion 63 is a flat portion for mainly restricting movement of the outer member 60 in the left-right direction of the vehicle (arrows L and R) with respect to the bracket member 30 (see FIG. 10), and a pair of the second wall portions 63 are parallel to each other. They are arranged opposite to each other (see FIG. 4B). In the pair of second wall portions 63, holes 63 a having a circular shape when viewed from the front are formed in a total of four locations, two locations for each second wall portion 63.

  As shown in FIG. 4A, each of the holes 63a is disposed at a position biased toward one first wall 62 side (lower side in FIG. 4A) of the pair of first wall portions 62. ing. Specifically, one of the holes 63 a formed at two locations is substantially at the center between the pair of first wall portions 62, and the other hole 63 a is one of the pair of first wall portions 62. Are arranged on the first wall 62 side.

  The second wall 63 has a bulged portion that is semicircular when viewed from the front, and is bulged from the outer edge, and each hole 63a is disposed at a position that is concentric with the bulged portion. As described above, since both the bulging portion and the through hole 61a are arranged to be deviated to one side from the center between the pair of first wall portions 61, the strength of the through hole 61a is reduced. Since it can be compensated by the bulging portion, the strength of the outer member 60 as a whole can be improved.

  Here, the pair of second wall portions 63 are formed in the same shape as each other including the arrangement of the holes 63a. Therefore, the outer member 60 can be used in common on both the left and right sides of the vibration isolator 1 (first molded body 100) (see FIG. 7).

  Next, the first molded body 100 will be described with reference to FIGS. FIG. 5 is a perspective view of the first molded body 100. FIG. 6A is a front view of the first molded body 100, and FIG. 6B is a side view of the first molded body 100. 7A is a cross-sectional view of the first molded body 100 taken along the line VIIa-VIIa in FIG. 6A, and FIG. 7B is a cross-sectional view taken along the line VIIb-VIIb in FIG. FIG. 8 is a sectional view of the first molded body 100 taken along the line VIII-VIII in FIG.

  As shown in FIGS. 5 to 8, the first molded body 100 is a primary processed product in the process of manufacturing the vibration isolator 1 (the vulcanization process using the rubber vulcanization mold 300), and the inner cylinder member 40, a pair of anti-vibration legs 50 having one end connected to the inner cylinder member 40, a pair of outer members 60 to which the other ends of the pair of anti-vibration legs 50 are respectively connected, and the outer member 60 The covering rubbers 51 to 53 are mainly provided and are symmetrically formed on the left and right (FIG. 6 (a) left and right).

  As shown in FIGS. 5 to 8, the upper side and the lower side of the inner cylinder member 40 are covered with rubber-like elastic bodies by connecting one end sides of a pair of vibration isolation legs 50, and When a large displacement is input in the direction (directions of arrows U and D), the inner cylindrical member 40 is brought into contact with the inner peripheral surface of the insertion hole 31 through the rubber-like elastic body (see FIG. 1).

  The pair of outer members 60 are opposed to each other with a predetermined interval while facing the back sides thereof, and the inner cylinder member 40 is disposed between the opposed members. The pair of outer members 60 are disposed in a state where the axis L1 (see FIG. 4A) of the base plate portion 61 is parallel to the axis of the inner cylinder member 40.

  The pair of anti-vibration legs 50 connect the inner cylinder member 40 and the pair of outer members 60, respectively, and are formed in a shape extending linearly to the left and right in a front view. The anti-vibration legs 50 are connected to respective covering rubbers 51 to 53 that cover the outer surface of the outer member 60.

  The substrate covering rubber 51 covers the outer surface of the substrate portion 61 with a constant thickness while filling the through hole 61a. The thickness of the substrate covering rubber 51 covered on the front side of the substrate portion 61 (the side on which the first and second wall portions 62 and 63 are extended) is sufficiently thin, and this embodiment Then, it is made smaller than the thickness dimension of the board | substrate part 61. FIG. Therefore, as will be described later, when the space S is filled with the resin material in the resin molding step, the resin material is fitted into the through hole 61a by the injection pressure.

  The first wall covering rubber 52 covers the outer surfaces of the pair of first wall portions 62 with a certain thickness, and the second wall covering rubber 53 covers the outer surfaces of the pair of first wall portions 63 with a certain thickness. Cover with dimensions. The second wall covering rubber 53 is partially formed with a portion (stopper surface portion 53b) having a thick thickness. Further, since the rubber mold lower pin 301a and the rubber mold upper pin 302a of the rubber vulcanizing mold 300 are inserted into the hole 53a of the second wall portion 53, the second wall covering rubber 53 is not filled. Similarly, the rubber mold seats 301c and 302c of the rubber vulcanization mold 300 are brought into contact with the outer surface of the second wall 63 (the surface opposite to the facing surface), so that the rubber mold seats 301c and 302c are in contact with each other. A correspondingly shaped recess is formed in the second wall covering rubber 53 (seal surface portion 53a). In addition, the second wall covering rubber 53 that is covered on the opposite surface side of the second wall portion 63 is thickened only in a portion corresponding to the hole 63a.

  As described above, the covering rubbers 51 to 53 cover the outer surface of the outer member 60 with a predetermined thickness dimension, so that the opposing surfaces of the first wall portion 62 and the second wall portion 63 of the outer member 60 (that is, A space S is formed in a portion surrounded by the substrate portion 61, the first wall portion 62, and the second wall portion 63). As will be described later, a part of the bracket member 30 is fitted in the space S.

  As described above, the second wall covering rubber 53 includes the seal surface portion 53a and the stopper surface portion 53b. The seal surface portion 53 a is connected to the first wall covering rubber 52 and has an outer surface (surface opposite to the space S) formed in a flat surface shape orthogonal to the axial direction of the inner cylinder member 40. The stopper surface portion 53b is formed in an outer shape smaller than the seal surface portion 53a in a front view (see FIG. 6A) and is positioned along the edge on the inner cylinder member 40 side, and from the outer surface of the seal surface portion 53a. A step 53c is formed between the inner cylindrical member 40 and the seal surface portion 53a.

  Next, a method for manufacturing the vibration isolator 1 will be described with reference to FIGS. FIG. 9 is a cross-sectional view of the rubber vulcanization mold 300 in which the inner cylinder member 40 and the outer member 60 are set and clamped, and illustrates a state before the rubber-like elastic body is injected into the cavity. Yes. FIG. 10 is a cross-sectional view of the resin molding die 400 in which the first molded body 100 is set and clamped, and shows a state before the resin material is injected into the cavity C. 9 and FIG. 10 corresponds to the cross section shown in FIG.

  As shown in FIG. 9, the rubber vulcanization mold 300 is a mold for vulcanization molding of the first molded body 100, and is clamped vertically (in the vertical direction in FIG. 9, the axial direction of the inner cylinder member 40). A lower mold 301 and an upper mold 302, and an intermediate mold 303 sandwiched between the upper and lower molds 301 and 302, and an injection hole (not shown) in a cavity formed by clamping in the rubber vulcanization process. The first molded body 100 (refer to FIG. 5) is molded by vulcanizing the rubber-like elastic body injected and filled from above.

  The lower mold 301 is a part for forming the outer shape of the first molded body 100 on the front side (the front side in FIG. 6A), and an inner cylinder locking portion 301a for locking the inner cylinder member 40. And a lower rubber mold pin 301b and a lower rubber seat 301c for locking the outer member 60.

  The inner cylinder locking portion 301 a is a portion that locks the lower end of the inner cylinder member 40, and includes a recessed groove portion that is recessed so that the lower end of the inner cylinder member 40 can be fitted inside, and a lower end opening of the inner cylinder member 40. And an insertion pin to be inserted.

  The lower rubber pin 301b is a cylindrical pin that is inserted into the hole 63a of the outer member 60, and is formed at a total of four locations, two on each side. By inserting each of these lower rubber mold pins 301b into each of the holes 63a, the outer member 60 is positioned at a predetermined position.

  The lower rubber mold seat portion 301c is a portion that supports the outer surface of the second wall portion 63 of the outer member 60, and is formed in a columnar shape having a larger diameter than the lower rubber pin 301b and concentric with the lower rubber pin 301b. Is formed. Therefore, the rubber lower mold pin 301b has a flat stepped surface between the rubber lower mold pin 301b and the stepped surface abuts on and supports the outer surface of the second wall portion 63. It is said that. The seat surface is set to have a diameter smaller than that of the semicircular bulge portion formed in the second wall portion 63 and is formed so as to be within the outer surface of the second wall portion 63. Yes.

  The upper mold 302 is a part for forming the outer shape of the back side of the first molded body 100 (FIG. 6A, the back side of the paper), and moves up and down (moves up and down in FIG. 9) with respect to the lower mold 301. Accordingly, the inner cylinder locking portion 302a for locking the inner cylinder member 40, the rubber upper mold pin 302b for locking the outer member 60, and the rubber upper mold seat are configured to be mold-clamped and mold-openable. Part 302c.

  The inner cylinder locking portion 302a, the rubber upper mold pin 302b, and the rubber upper mold seat portion 302c have the same configuration as the inner cylinder locking portion 301a, the rubber lower mold pin 301b, and the rubber lower mold seat portion 301c in the lower mold 301. Therefore, the description thereof is omitted. However, the upper rubber mold pin 302b is configured as a conical tapered pin whose maximum diameter is slightly smaller than the outer diameter of the lower rubber mold pin 301b in the lower mold 301 and becomes smaller in diameter toward the distal end side. Thereby, when setting the outer member 60, the dimensional tolerance of the outer member 60 can be absorbed to improve workability, and the outer member 60 can be held in the cavity in an appropriate posture. It can be done firmly.

  The middle mold 303 is a part for forming the outer shapes of the upper and lower surfaces and both side surfaces (the upper and lower surfaces and the left and right surfaces in FIG. 6A) of the first molded body 100, and is composed of a plurality of separable lower molds. 301 is arranged at a predetermined position.

  As shown in FIG. 10, the resin molding die 400 is a die for insert-molding the first molded body 100 to the bracket member 30, and vertically (in the vertical direction in FIG. 9, the axial direction of the inner cylinder member 40). The vibration isolator 1 includes a lower mold 401 and an upper mold 402 that are clamped, and a resin material is injected (injected) into a cavity C formed by mold clamping from an injection hole (not shown) and solidified. Is molded.

  The lower mold 401 is a part for forming the outer shape of the bracket 30 together with the upper mold 402, and an inner cylinder locking portion 401a for locking the inner cylinder member 40 and a resin for locking the outer member 60. A lower mold pin 401b and a resin lower mold seat portion 401c are provided. The inner cylinder locking portion 401a, the resin lower mold pin 401b, and the resin lower mold seat portion 401c are the inner cylinder locking portion 301a, the rubber lower mold pin 301b, and the rubber lower mold in the lower mold 301 of the rubber vulcanizing mold 300. Since it is the same structure as the seat part 301c, the description is abbreviate | omitted.

  The upper mold 402 is configured to be mold-clamped and mold-openable by moving up and down (moving up and down in FIG. 10) with respect to the lower mold 401, and an inner cylinder locking portion 402a for locking the inner cylinder member 40. And an upper resin mold pin 402b for locking the outer member 60 and an upper resin mold seat portion 402c. The inner cylinder locking portion 402a, the resin upper mold pin 402b, and the resin upper mold seat portion 402c are the inner cylinder locking portion 302a, the rubber upper mold pin 302b, and the rubber upper mold in the upper mold 302 of the rubber vulcanizing mold 300, respectively. Since it is the same structure as the seat part 302c, the description is abbreviate | omitted.

  The lower mold 401 and the upper mold 402 are formed with press-fitting hole forming pins (not shown). In the resin vulcanization process, two press-fitting holes (each of the mounting brackets 11, 12 and holes (see FIG. 1) through which bushes composed of elastic bodies 21 and 22 vulcanized and bonded to the outer peripheral surfaces thereof are press-fitted.

  The vibration isolator 1 is manufactured by first performing a rubber vulcanization process to form the first molded body 100, then proceeding to a resin molding process, and insert molding the first molded body 100 into the bracket member 30. Done.

  That is, in the rubber vulcanization process, first, the inner cylinder member 40 and the outer member 60 are set on the lower mold 301 of the rubber vulcanization mold 300, and then the middle mold 303 is disposed at a predetermined position on the lower mold 301, The mold 302 is moved down and clamped. As a result, a cavity, which is a vulcanization space for vulcanizing the rubber-like elastic body, is formed as shown in FIG. 9, and the rubber-like elastic body is injected into the cavity from an injection hole (not shown). A rubber-like elastic body is filled in the cavity. Then, by holding the rubber vulcanizing mold 300 in a pressurized and heated state for a predetermined time, the rubber-like elastic body (anti-vibration leg portion 50 and the respective covering rubbers 51 to 53) is vulcanized, and the first molding is performed. The body 100 is molded.

  In this case, the outer member 60 has two holes 63 a in each of the pair of second wall portions 63. Each of these holes 63a is disposed at a position that is biased to one side of the center between the pair of first wall portions 62 (see FIG. 4A). Therefore, when the outer member 60 is set in the lower mold 301 of the rubber vulcanizing mold 300, each rubber lower mold pin 301b is appropriately inserted into each hole 63a formed in the second wall 63. Is needed.

  That is, if the orientation of the outer member 60 is set correctly and the corresponding rubber lower mold pins 301b are not inserted into the respective holes 63a, the second wall 63 of the outer member 60 is inserted into the cavity (recessed portion) of the lower mold 301. ) (Because the thickness dimension of the first wall covering rubber 62 is sufficiently smaller than the distance between the pair of second wall portions 52). Therefore, even when the through-hole 61a is formed at a biased position and the outer member 60 has directionality, work failure (setting failure) when setting the outer member 60 to the rubber vulcanizing mold 300 is avoided. It can be surely suppressed.

  Further, since the pair of second wall portions 63 are provided with holes 63a at two locations, respectively, in a state where the outer member 60 is set on the lower mold 301 in the rubber vulcanization process, The rotation can be reliably controlled. Therefore, when the upper mold 302 is clamped to the lower mold 301, each rubber upper mold pin 302b can be surely inserted into each hole 63a.

  Further, the rubber lower mold pin 301b and the rubber upper mold pin 302b are respectively inserted into the holes 63a of the pair of second wall portions 63, so that the outer member 60 is placed in the cavity of the rubber vulcanizing mold 300. Since it can hold | maintain reliably, the deformation | transformation of the outer member 60 by the vulcanization pressure which acts via a rubber-like elastic body can be suppressed.

  Further, in this way, even in a configuration in which a plurality of holes 63a and lower rubber mold pins 301b and the like are provided in order to enable the installation failure and deformation of the outer member 60 to be suppressed, these holes 63a and lower rubber mold pins 301b. Are formed in a simple shape having a circular cross section, and therefore, the manufacture thereof is facilitated, and the product cost of the vibration isolator 1 and the rubber vulcanizing mold 300 can be reduced.

  Since each covering rubber 51 to 53 covering the outer member 60 is made of a rubber-like elastic body connected to the vibration isolating leg 50, the vibration isolating leg 50 and each covering rubber 51 to 53 are simultaneously vulcanized and molded. The manufacturing cost can be reduced accordingly. In addition, by forming the covering rubbers 51 to 53 in this way, the entire outer member 60 can be covered with the rubber-like elastic body, so that the corrosion resistance of the outer member 60 can be improved.

  Here, the outer member 60 installed in the cavity of the rubber vulcanization mold 300 has a gap between it and the rubber vulcanization mold 300 over the entire surface by the thickness of the respective covering rubbers 51 to 53 covering the outer surface. Therefore, it is easily deformed by the vulcanization pressure acting through the rubber-like elastic body. In particular, the substrate portion 61 is significantly deformed compared to the second wall portion 63 supported by the lower rubber mold pins 301b and the like. On the other hand, in the vibration isolator 1 according to the present embodiment, since the through hole 61a is formed through the substrate portion 61, the vulcanization pressure acting via the rubber-like elastic body is released by the through hole 61a. As a result, deformation of the outer member 60 can be suppressed.

  The rubber vulcanizing mold 300 includes a first molded body 100 along the parting line PL (the mating surface of the lower mold 301 and the middle mold 303 and the mating surface of the upper mold 302 and the middle mold 303) of the first molded body 100. The upper and lower molds 301, 301 are arranged so that the position of the burr formed on the surface of the outer member 60 (see FIGS. 11 and 12) is on the inner side (that is, the through hole 61a side) than the second wall 63 of the outer member 60. The position of the split surface between 302 and the middle mold 303 is set.

  Next, in the resin molding step, the first molded body 100 is set on the lower mold 401 of the resin molding die 400, and then the upper mold 402 is moved downward and clamped. As a result, as shown in FIG. 10, a cavity C that is a space for filling and solidifying the resin material is formed, so that the resin material is injected (injected) into the cavity C from an injection hole (not shown), By holding for a predetermined time, the resin material is solidified, and the first molded body 100 is insert-molded into the bracket member 30. Finally, the bushing is press-fitted into the press-fitting hole of the bracket member 30 to complete the manufacture of the vibration isolator 1.

  In this case, the first molded body 100 is set in the lower mold 401 of the resin molding die 400 by inserting the resin lower mold pin 401b through the hole 63a formed in the second wall portion 63 of the outer member 60. Therefore, as in the case of the rubber vulcanization process described above, the direction of the first molded body 100 (that is, the direction of the outer member 60) is set correctly, and the resin lower mold pin corresponding to each of the holes 63a. The first molded body 100 cannot be accommodated in the cavity (concave portion) of the lower mold 401 unless the respective 401b is inserted. Therefore, even when the through-hole 61a of the outer member 60 is formed at a deviated position and the first molded body 100 has directionality, the first molded body 100 is set in the resin molding die 400. Work defects (defective installation) can be reliably suppressed.

  Similarly to the rubber vulcanization process described above, in a state where the first molded body 100 is set in the lower mold 401, the resin lower mold pins 401b are inserted into the two holes 63a of the second wall portion 63, respectively. Thereby, rotation of the 1st molded object 100 can be controlled reliably. Therefore, when the upper die 402 is clamped to the lower die 401, each resin upper die pin 402b can be reliably inserted into each hole 63a.

  Further, the lower resin pin 401b and the upper resin mold pin 402b are inserted into the respective holes 63a of the pair of second wall portions 63, so that the outer member 60 can be reliably secured in the cavity of the resin molding die 400. Therefore, deformation of the outer member 60 due to the injection pressure of the resin material injected into the cavity can be suppressed.

  As in the case of the rubber vulcanization process described above, the resin lower mold pin 401b and the resin upper mold pin 402b are formed in a simple shape having a circular cross section, which facilitates their manufacture, and makes the resin molding mold 400 product costs can be reduced.

  Here, in the rubber vulcanization step, the second wall portion 63 of the outer member 60 is supported by the lower rubber seat portion 301c and the upper rubber seat portion 302c. The seat surfaces of the lower rubber seat portion 301c and the upper rubber seat portion 302c are concentric with the hole 63a and have an annular shape having a smaller diameter than the bulging portion of the second wall portion 63, and therefore, from the outer edge of the second wall portion 63. It does not protrude and fits within the plate surface of the second wall 63. Therefore, the second wall covering rubber 53 covering the second wall portion 63 is only partially recessed near the hole 63a, and no recess is formed at the four corners.

  That is, in the conventional manufacturing method, since the four corners of the second wall 63 are supported by the rubber vulcanization mold, the concave portions corresponding to the support portions of the rubber vulcanization mold are formed at the four corners of the second wall covering rubber 53. Is done. For this reason, in the resin molding process, it is difficult to ensure the sealing performance of the resin material, so that the structure and shape of the resin molding die are complicated and the manufacturing cost increases. On the other hand, according to the manufacturing method in the present embodiment, since there are no recesses at the four corners of the second wall covering rubber 53 and it is easy to ensure the sealing performance, the structure and shape of the resin molding die 400 are simplified. Manufacturing cost can be reduced.

  Further, when the structure is such that the four corners of the second wall portion 63 are supported by the rubber vulcanization mold as in the conventional manufacturing method, there is an R shape between the second wall portion 63 and the substrate portion 61 by bending. In this case, since the R shape has a large dimensional tolerance, it is necessary to set a large dimensional tolerance for the support portion on the rubber vulcanization mold side that supports the R shape portion. The positional accuracy with respect to is reduced. On the other hand, according to the manufacturing method in the present embodiment, if the rubber lower mold pin 301b or the like is inserted into the hole 63a of the second wall portion 63, the dimensional tolerance is reduced and the rubber vulcanization mold is configured. The positional accuracy with respect to 300 can be improved. As a result, the relative positional accuracy between the outer member 60 and the inner cylindrical member 40 or the vibration isolation leg 50 can be improved, so that the static and dynamic characteristics of the vibration isolation device 1 can be stabilized. .

  Here, the first molded body 100 molded by the rubber vulcanization process includes a portion surrounded by the first wall portion 62 and the second wall portion 63 of the outer member 60 (that is, the first wall covering rubber 52). And a portion surrounded by the second wall covering rubber 53). When the resin material is injected into the cavity of the resin molding die in the resin molding step, the resin material is filled in the space S. As a result, the first molded body 100 is insert-molded into the bracket member 30 in a state where a part of the bracket member 30 is fitted in the space S.

  In this case, since the through hole 61a is formed through the substrate portion 61 of the outer member 60, the injection (injection) pressure of the resin material injected into the cavity of the resin molding die is used as the through hole in the resin molding step. It can be made to act on the vibration isolation leg part 50 through 61a. Thereby, since pre-compression can be provided to the vibration-proof leg part 50, the vibration-proof member 50 excellent in durability can be manufactured.

  Moreover, since the amount of pre-compression applied to the vibration isolation leg 50 can be changed by changing the injection pressure of the resin material, the spring of the vibration isolation leg 50 is manufactured when the vibration isolation member 1 is manufactured. Characteristics can be adjusted. That is, when adjusting the characteristics of the anti-vibration legs 50 by changing the characteristics (for example, rubber hardness) of the rubber-like elastic body, fine adjustment of the characteristics is difficult because the rubber hardness varies widely from lot to lot. is there. On the other hand, since the injection (injection) pressure of the resin material can be adjusted with high accuracy or easily by setting the injection molding machine, the adjustment of the spring characteristics of the vibration isolation leg 50 by changing the pre-compression amount is surely performed. Can do.

  Further, for example, by increasing the injection (injection) pressure of the resin material, the resin material filled in the space S is pushed through the through hole 61a toward the vibration isolation leg 50, and the resin material enters the through hole 61a. It is possible to form an internal fitting state that penetrates the vibration isolating leg 50 while penetrating (however, in FIGS. 13 and 14 to be described later, a molding state when the injection pressure of the resin material is low is shown). . Therefore, when such an internal fitting state is formed, the vibration isolator 1 that can more reliably prevent the outer member 60 from coming out of the bracket member 30 can be manufactured.

  Next, with reference to FIG. 11 and FIG. 12, a seal structure when the first molded body 100 is insert-molded into the bracket member 30 by the resin molding die 400 will be described. Since the seal structure by the lower mold 401 is the same as the seal structure by the upper mold 402, the upper mold 402 will be described as an example, and the description of the lower mold 401 will be omitted.

  11 and 12 are cross-sectional views of the resin molding die 400 in which the first molded body 100 is set and clamped, and the state before the resin material is injected into the cavity C is illustrated. 11 corresponds to an enlarged view of FIG. 10, and FIG. 12 corresponds to a cross-sectional view taken along line XII-XII of FIG. Moreover, in FIG.11 and FIG.12, the position of the parting line PL formed on the surface of the 2nd wall covering rubber | gum 53 is illustrated with an arrow.

  As shown in FIGS. 11 and 12, the resin molding die 400 includes a first pressing surface portion 402d that presses and seals the side surface (the left side surface in FIGS. 11 and 12) of the sealing surface portion 53a of the second wall covering rubber 53. A vertical wall between the second pressing surface portion 402e and the second pressing surface portion 402e that is connected to the first pressing surface portion 402d and presses and seals the upper surface of the sealing surface portion 53a of the second wall covering rubber 53 It mainly includes a third pressing surface portion 402g that presses and seals the upper surface of the stopper surface portion 53b of the second wall covering rubber 53 that is provided continuously through 402f.

  The first pressing surface portion 401d is formed on a flat surface parallel to the side surface (the left side surface in FIGS. 11 and 12) of the seal surface portion 53a, and the distance from the axis of the inner cylinder member 40 is larger than the side surface of the seal surface portion 53a. It has been shortened. The second pressing surface portion 402e is formed on a flat surface parallel to the upper surface of the seal surface portion 53a, and the third pressing surface portion 402g is formed on a flat surface parallel to the upper surface of the stopper surface portion 53b. The second pressing surface portion 402e and the third pressing surface portion 403g have an opposing distance (the vertical dimension in FIGS. 11 and 12) between the second pressing surface portion and the third pressing surface portion (not shown) in the lower mold 401. The distance between the upper surfaces of the pair of seal surface portions 53a and the pair of stopper surface portions 53b (the vertical dimension in FIGS. 11 and 12) is shorter. In the present embodiment, the first pressing surface portion 401d is formed parallel to the axial direction of the inner cylinder member 40, while the second pressing surface portion 402e and the third pressing surface portion 403g are orthogonal to the axial direction of the inner cylinder member 40. Is formed.

  Therefore, in the resin molding step, when the upper mold 402 is moved downward in parallel to the axial direction of the inner cylinder member 40 and is clamped, the second pressing surface portion 402e of the upper mold 402 is moved to the second wall covering rubber 53. The upper surface of the seal surface portion 53a is pressed toward the mold clamping direction (downward in FIGS. 11 and 12). Accordingly, since the cavity C into which the resin material is injected and the space R on the side where the stopper surface portion 53b is accommodated can be partitioned, the occurrence of burrs due to the resin material during insert molding is suppressed and the stopper function is ensured. Can do.

  That is, as described above, the seal surface portion 53a is formed in a flat surface shape orthogonal to the axial direction (that is, the mold clamping direction) of the inner cylinder member 40, and the second pressing surface portion 402e of the upper mold 402 is formed by the seal surface portion 53a. Since the pressing is performed in the tightening direction, the second pressing surface portion 402e and the seal surface portion 53a can be firmly adhered to each other. Therefore, the resin material injected into the cavity C can be prevented from entering between the second pressing surface portion 402e and the seal surface portion 53a, and generation of burrs during insert molding can be suppressed accordingly.

  In addition, if the adhesion between the second pressing surface portion 402e and the seal surface portion 53a can be strengthened in this manner, the other pressing surface portions (the first pressing surface portion 402d and the third pressing surface portion) correspondingly. 402g) and the dimensional accuracy of the sealing surface portion 53a and the stopper surface portion 53b of the first molded body 100 can be moderated, so that the manufacturing cost of the resin molding die 400 and the rubber vulcanizing die 300 can be reduced. it can.

  Further, the stopper surface portion 53b is connected to the seal surface portion 53a via a step 53c, and the height of the stopper surface portion 53b is larger than that of the seal surface portion 53a by the amount of the step 53c (projects in the axial direction of the inner cylinder member 40). Therefore, even if the resin material injected into the cavity C enters between the second pressing surface portion 402e and the seal surface portion 53a, the intruded resin material becomes a burr. The stopper surface (upper surface side, FIG. 11 and FIG. 12 upper side) of the stopper surface portion 53b can be separated from the burr by the level difference 53c. Therefore, even if burrs occur, the stroke (compression allowance) of the stopper surface portion 53b can be ensured and the stopper function can be exhibited.

  In this case, the second pressing surface portion 402e is formed so as to overlap at least a part of the second wall portion 63 of the outer member 60 in the mold clamping direction view of the resin molding die 400. That is, in the present embodiment, the vertical wall 402f of the upper mold 402 is located between the end of the second wall 63 opposite to the substrate 61 (on the left side in FIGS. 11 and 12) and the substrate 61. .

  As a result, the upper die 402 is clamped, and the second pressing surface portion 402e of the upper die 402 faces the upper surface of the seal surface portion 53a of the second wall covering rubber 53 in the clamping direction (downward in FIGS. 11 and 12). In the case of pressing, the region that overlaps at least a part of the outer member 60 (second wall 63) is pressed, so that the seal surface portion 53a pressed by the second pressing surface portion 402e is moved to the back side (FIG. 11 and FIG. 11). The outer member 60 made of a metal material can be supported from the lower side of FIG. Thereby, since the close contact between the second pressing surface portion 402e and the sealing surface portion 53a can be further strengthened, the resin material injected into the cavity C enters between the second pressing surface portion 402e and the sealing surface portion 53a. This can be suppressed, and the generation of burrs during insert molding can be more reliably suppressed.

  In the present embodiment, when the resin molding die 400 is clamped, the first pressing surface portion 402d also has the side surface (the left side surface in FIGS. 11 and 12) of the sealing surface portion 53a of the second wall covering rubber 53. Press. Therefore, since the sealing can be performed on the side surface of the second pressing surface portion 402e, the resin material injected into the cavity C reaches the space between the second pressing surface portion 402e and the upper surface of the sealing surface portion 53a. Can be suppressed more reliably. As a result, it is possible to more reliably suppress the stopper function from being hindered by the occurrence of burrs during insert molding.

  On the other hand, the first pressing surface portion 402d does not press the entire region of the side surface (the left side surface in FIGS. 11 and 12) of the sealing surface portion 53a, but at least the upper surface side of the sealing surface portion 53a from the parting line PL (FIG. 11). And only the area | region located in FIG. Thereby, in the resin molding step, when the first molded body 100 is insert-molded into the bracket member 30, the parting line PL can be covered with the resin (embedded in the bracket member 30). As a result, the parting line PL can be hidden from the appearance of the vibration isolator 100, and the appearance of the product can be enhanced, and cracking of the first molded body 100 can be suppressed by using the parting line PL as a base point. it can.

  Here, in the present embodiment, the resin molding die 400 includes a vertical wall 402f that continuously connects the second pressing surface portion 402e and the third pressing surface portion 402g, and a step 53c that continuously connects the seal surface portion 53a and the stopper surface portion 53b. Are formed so as to have a gap T as a space. Thereby, during mold clamping, the extra space of the rubber-like elastic body pushed out by pressing the sealing surface portion 53a by the first pressing surface portion 402d and the second pressing surface portion 402e is removed between the vertical wall 402f and the step 53c. It can be absorbed by T.

  Thus, by letting out the surplus, the first pressing surface portion 402d, the second pressing surface portion 402e, and the seal surface portion 53a can be brought into close contact with each other without being hindered by the surplus. As a result, the resin material injected into the cavity C can be prevented from entering between the first pressing surface portion 402d and the second pressing surface portion 402e and the seal surface portion 53a, and accordingly, burrs are generated during insert molding. Can be suppressed more reliably.

  A detailed configuration of the vibration isolator 1 configured as described above will be described with reference to FIGS. 13 and 14. 13 and 14 are partial cross-sectional views of the vibration isolator 1, and correspond to the cross-sections shown in FIGS. 7 (a) and 7 (b), respectively. Note that FIG. 13 illustrates a counterpart component 500 that is disposed to face the second wall covering rubber 53 when the vibration isolator 1 is assembled to a vehicle. Further, in FIG. 14, a part of the vibration isolator 1 is partially enlarged, and in this enlarged part, the sectional lines of the bracket member 30 and the covering rubbers 51 and 52 are shown in order to simplify the drawing. Is omitted.

  As shown in FIGS. 13 and 14, the other end side (left side of FIGS. 13 and 14) of the anti-vibration leg portion 50 is vulcanized and bonded to the back side of the substrate portion 61. A pair of first wall portions 62 are extended toward the member 30 (that is, toward the side opposite to the anti-vibration legs 50), and the pair of second wall portions 63 are kept parallel to each other. The first wall portion 62 and the second wall portion 63 are extended and are embedded in the bracket member 30 while being connected in the circumferential direction (that is, along the outer edge of the substrate portion 61).

  Therefore, with respect to the movement of the outer member 60 in the left-right direction of the vehicle with respect to the bracket member 30 (arrows L and R directions, the vertical direction in FIG. 13), between the pair of second wall parts 63 and the pair of second wall parts 63 facing each other It can regulate by engagement with the fitted part of the bracket member 30 fitted inside.

  Further, regarding the movement of the outer member 60 with respect to the bracket member 30 in the vehicle vertical direction (arrow U, D direction, vertical direction in FIG. 14), the pair of first wall portions 62 and the pair of first wall portions 62 are opposed to each other. Engagement with the internally fitted portion of the bracket member 30 that is internally fitted, and engagement between the pair of first wall portions 62 and the holding portion of the bracket member 30 that holds the pair of first wall portions 62 Can be regulated.

  Further, regarding the movement of the outer member 60 in the vehicle front-rear direction of the outer member 60 with respect to the bracket member 30 (arrows F and B directions, right and left directions in FIG. 14) and in the direction of exiting from the bracket member 30 (right direction in FIG. 14). And restricting by engagement between the pair of first wall portions 62 and the protruding portion of the bracket member 30 protruding to the outer surface side of the pair of first wall portions 62 (that is, the portion indicated by the range L in FIG. 14). Can do.

  As described above, since the engagement of the outer member 60 and the bracket member 30 in the vehicle front-rear direction is a structure achieved by embedding the pair of first wall portions 62 of the outer member 60 in the bracket member 30, the outer member It is not necessary to project the bracket member 30 toward the antivibration leg portion 50 in order to engage 60, and it is possible to suppress the formation of an undercut shape as in the conventional product. Therefore, the structure of the resin molding die 400 for molding the bracket member 30 can be simplified.

  Moreover, since the vibration isolator 1 can regulate the movement of the outer member 60 with respect to the bracket member 30 in each direction, the outer member 60 and the bracket member 30 can be moved regardless of which direction the inner cylinder member 40 is displaced. Thus, the outer member 60 can be prevented from coming out of the bracket member 30.

  Here, the outer member 60 can be easily manufactured while the movement with respect to the bracket member 30 can be restricted in each direction. That is, the outer member 60 is formed in a shape (so-called container shape) in which the plate-like first and second wall portions 62 and 63 extend from the outer edge of the plate-like substrate portion 61 toward one side. A single flat base plate can be easily manufactured by drawing with a press machine using a punch and a die. Therefore, the manufacturing cost of the outer member 60 can be reduced, and the product cost of the vibration isolator 1 as a whole can be reduced accordingly.

  In this case, since the end portions of the first wall portion 62 and the second wall portion 63 are connected to each other, that is, formed continuously in the circumferential direction, the bending direction of each of the wall portions 62 and 63 is determined. The strength in the direction of swinging with respect to the substrate unit 61 can be increased. Therefore, the plate thickness of the outer member 60 can be reduced correspondingly, so that the material cost can be reduced and the weight can be reduced.

  Further, as described above, the second wall covering rubber 53 covering the second wall portion 63 is formed so that the stopper surface portion 53b protrudes from the outer surface of the bracket member 30 to the counterpart component 500 side. The stopper surface portion 53b of the installation rubber 53 can be used as a stopper portion that abuts against the counterpart component 500 and restricts its displacement. In this case, the second wall covering rubber 53 is embedded with a flat plate-like second wall portion 63 arranged in parallel in the vicinity of the stopper surface portion 53b. The impact force can be received by the second wall 63 and the burden on the bracket member 30 can be reduced. Thereby, even if it is a case where the bracket member 30 is formed from a resin material, the improvement of the durability can be aimed at.

  Further, as described above, the end of the second wall 63 is connected to the end of the first wall 62 and the strength in the bending direction is increased. The impact force of the bracket member 30 as well as the outer member 60 itself can be improved.

  Next, the second and third embodiments will be described with reference to FIG. FIG. 15A is a cross-sectional view of the outer member 2060 in the second embodiment, and FIG. 15B is a cross-sectional view of the outer member 3060 in the third embodiment. 15A and 15B correspond to cross-sectional views of the outer member taken along line IVa-IVa in FIG.

  In the first embodiment, the case where the second wall 63 of the outer member 60 has the circular hole 63a in front view has been described. However, the outer members 2060 and 3060 in the second and third embodiments The two walls 2063 and 3063 are formed with holes 2063a and 3063a having an oblong shape and a trapezoidal shape when viewed from the front. In addition, the same code | symbol is attached | subjected to the part same as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

  As shown in FIGS. 15A and 15B, the second wall portions 2063 and 3063 correspond to the second wall portion 63 in the first embodiment, and a pair of the second wall portions 2063 and 3063 are arranged to face each other while being kept parallel. It is a flat part. The second wall portion 2063 is formed with two holes 2063a that are oblong in front view, one for each second wall portion 2063 in total. Similarly, a trapezoidal hole 3063a in front view is formed in the second wall portion 3063 at a total of two locations, one for each second wall portion 3063.

  As shown in FIGS. 15A and 15B, each of the holes 2063a and 3063a has a first wall 62 side of the pair of first wall portions 62 (see FIGS. 15A and 15B). 15 (b) on the left side). Further, the second wall portions 2063 and 3063 are formed with a bulging portion bulging from the outer edge, and each of the holes 2063a and 3063a is surrounded by the bulging portion.

  Here, the pair of second wall portions 2063 and the pair of second wall portions 3063 are formed in the same shape, including the arrangement of the holes 2063a and 3063. Therefore, the outer members 2060 and 3060 can be used in common on both the left and right sides of the vibration isolator 1 (first molded body 100) as in the case of the first embodiment.

  It should be noted that the rubber vulcanizing mold and the resin molding mold are shaped so that the outer shapes of the lower rubber pin, the upper rubber mold pin, the lower resin mold pin and the upper resin mold pin correspond to the holes 2063a and 3063a (that is, the cross-sectional length The outer members 2060 and 3060 are positioned at predetermined positions by inserting the pins into the holes 2063a and 3063a.

  The rubber lower mold seat, the rubber upper mold seat, the resin lower mold seat, and the resin lower mold seat have an outer shape larger than each pin and smaller than the bulge portion (that is, the first mold seat). A flat stepped surface formed between each pin and the outer surface of the second wall portions 2063 and 3063 and supporting the outer surface of the second wall portions 2063 and 3063. Has been.

  Therefore, also in the second and third embodiments, as in the case of the first embodiment, it is possible to suppress the work failure (setting failure) when setting the outer members 2060 and 3060 to the rubber vulcanization mold. Can do. Further, in a state where the outer members 2060 and 3060 are set in the lower mold, the rotation of the outer members 2060 and 3060 can be restricted. Therefore, when clamping the upper mold to the lower mold, The holes 2063a and 3063a can be reliably inserted.

  Similarly to the case of the first embodiment, each pin is inserted into each hole 2063a, 3063a of the pair of second wall portions 2063, 3063, thereby acting via a rubber-like elastic body. Deformation of the outer members 2060 and 3060 due to the vulcanization pressure can be suppressed.

  Further, as in the case of the first embodiment, since the first molded body can be formed without forming the recesses at the four corners of the second wall covering rubber, it is easy to ensure the sealing performance in the resin molding process. It can be. Therefore, the structure and shape of the resin molding die can be simplified, and the manufacturing cost can be reduced.

  Further, as in the case of the first embodiment, the holes 2063a and 3063a of the outer members 2060 and 3060 are formed by a mold structure that is locked by the pins, so that it is compared with the structure that supports the four corners. Further, the positional accuracy of the outer members 2060 and 3060 with respect to the rubber vulcanizing mold can be improved, and the relative positional accuracy with respect to the inner cylinder member 40 and the anti-vibration legs 50 can be improved. Stabilization of dynamic and dynamic characteristics can be achieved.

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

  The numerical values given in the above embodiments are merely examples, and other numerical values can naturally be adopted. For example, in the first embodiment, the case where the holes 63a are formed in a total of four locations of the pair of second wall portions 63 has been described. However, the total number may be three or less, or a total of five or more locations. It may be. For example, a configuration in which one of the pair of second wall portions 63 is drilled in two places and the other in one place may be employed. This is because the minimum arrangement number can reliably prevent the outer member 60 from rotating and falling in the rubber vulcanization process. The same applies to the second and third embodiments, and the number of holes 2063a and 3063a can be arbitrarily set.

  As in the above embodiments, the number of holes 63a, 2063a, 3063a formed in each of the pair of second wall parts 63, 2063, 3063 is the same, so that drawing and drilling can be performed. The processing accuracy can be improved so that the processing can be performed symmetrically.

  In each of the above-described embodiments, the case where the outer members 60, 2060, 3060 are press-molded from one flat base plate by drawing using a press machine is not necessarily limited thereto. Of course, it is possible to adopt other molding methods.

  Examples of other forming methods include a method of forming a plurality of plate materials by welding and fixing, a method of forming by cutting out from a rectangular parallelepiped material, and the like. In this case, the outer member does not need to have a container shape as in the above embodiments. For example, the base of the rod-shaped body that becomes wider toward the tip (that is, the cross-sectional area becomes larger toward the tip) is fixed to the front surface of the substrate 61 (opposite to the back surface to which the antivibration legs 50 are connected) ( For example, the rod-shaped body may be embedded in the bracket member 30 by welding. Also by this, the movement of the outer member in each direction with respect to the bracket member 30 can be restricted, and the removal thereof can be prevented.

  Further, in each of the above-described embodiments, the entire pair of opposing first wall portions 62 are extended in a divergent shape as they are separated from the substrate portion 61 (that is, the entire pair of first wall portions 62 are opposed to each other). However, the present invention is not necessarily limited to this, and it is sufficient that at least a part of the pair of first wall portions 62 can be engaged with the bracket member 30. Note that “engageable” means that when the outer member 60 is displaced in the direction in which the first wall 62 is extracted from the bracket member 30, the movement of the first wall 62 in the extraction direction is the resin material of the bracket member 30. It means that it is regulated by. Therefore, for example, in the pair of first wall portions 62, the portions on the substrate portion 61 side (right side in FIG. 4A) are formed in parallel with each other, and the remaining portions (portions opposite to the substrate portion 61, FIG. a) Only the left side) may be formed in a divergent shape (a shape in which the facing interval gradually increases). Alternatively, the pair of first wall portions 62 are formed in parallel to each other and extended from the same height position as the second wall portion 63 and the extended end of the portion (the left end in FIG. 4A). It may be formed having a flange-like portion that is folded outward or inward. This is because any shape can be engaged with the bracket member 30.

  In each of the above embodiments, the case where the ends of the pair of first wall portions 62 and the pair of second wall portions 63 are connected to each other (formed continuously in the circumferential direction) has been described. The present invention is not necessarily limited to this, and it is naturally possible to form the first wall portion 62 and the second wall portion 63 without connecting part or all of the end portions thereof.

  In each of the above embodiments, the case where the through hole 61a is formed through the substrate 61 has been described. However, the present invention is not necessarily limited to this, and the formation of the through hole 61a may be omitted. The shape of the through hole 61a does not have to be a rectangular shape when viewed from the front, and may be a curved shape such as a circle or an ellipse, or may be a triangle or a polygon more than a pentagon. Moreover, the arrangement | positioning number can also set arbitrary numbers.

  Further, in each of the above embodiments, the case where the outer member 60, 2060, 3060 is embedded in the other end side of the antivibration leg portion 50 has been described. However, the present invention is not necessarily limited thereto, and the outer member 60, 2060 is not necessarily limited thereto. , 3060 may be omitted. That is, in the rubber vulcanization step, only the inner cylinder member 40 is set in the rubber vulcanization mold 300, and the first molded body 100 is vulcanized and molded with the outer member 60 omitted, and then the first molded body. The vibration isolator 1 may be manufactured by setting 100 in the resin mold 400 and insert molding.

  In this case, the pins 301b, 302b, 401b, 402b such as the rubber lower mold pin 301b and the resin lower mold pin 401b, and the seat portions 301c, 302c, such as the rubber lower mold seat portion 301c and the resin lower mold seat portion 401c, 401c and 402c are omitted. Even in this case, the bracket member 30 is fitted into the space S (see FIG. 10) formed in the other end side of the vibration isolating leg 50 and the bracket is formed by the inclination of the first wall covering rubber 652. Due to the engagement with 30 (see FIG. 14), the vibration-proof leg portion 50 can be prevented from coming out of the bracket member 30 as in the case where the outer member 60 is embedded.

  In each of the above embodiments, the case where the first pressing surface portion 402d is provided has been described. However, the present invention is not necessarily limited thereto, and the formation of the first pressing surface portion 402d may be omitted. That is, in FIG.11 and FIG.12, you may form the 2nd press surface part 402e and the upper surface (FIG.11 and FIG.12 upper side surface) of the cavity C flush. Or it is good also considering the upper surface of the cavity C as the height position between the 2nd press surface part 402e and the 3rd press surface part 402g.

  Similarly, in each of the above embodiments, the case where the third pressing surface portion 402g is provided has been described. However, the present invention is not necessarily limited thereto, and the formation of the third pressing surface portion 402g may be omitted. That is, a configuration may be adopted in which a gap is provided between the third pressing surface portion 402g and the upper surface of the stopper surface 53b (upper side surfaces in FIGS. 11 and 12) during mold clamping.

  In each of the above embodiments, the case where the gap T is provided between the vertical wall 402f and the step 53c has been described (see FIGS. 11 and 12). However, the present invention is not necessarily limited to this, and the gap T is not limited to this. Instead, the vertical wall 402f may be configured to press the step 53c.

DESCRIPTION OF SYMBOLS 1 Anti-vibration apparatus 30 Bracket member 31 Inner insertion hole 40 Inner cylinder member 50 Anti-vibration leg part 53 2nd wall covering rubber (projection rubber part)
53a Seal surface portion 53b Stopper surface portion 53c Steps 60, 2060, 3060 Outer member 100 First molded body 300 Rubber vulcanizing mold 400 Resin molding die 402e Second pressing surface portion (pressing surface portion)
402f Vertical wall R space (space in which the stopper surface portion is accommodated)
C Cavity T Clearance

Claims (4)

A cylindrical inner cylinder member attached to one of the vibration generator side or the vehicle body side, and an insertion hole into which the inner cylinder member is inserted and arranged, are made of a resin material, and are arranged on the vibration generator side or the vehicle body side. One end side is connected to the bracket member attached to the other and the outer peripheral surface of the inner cylinder member, and the other end side is connected to the inner peripheral side of the insertion hole of the bracket member by insert molding and is made of a rubber-like elastic body. A vibration isolator comprising a pair of vibration isolator legs,
The anti-vibration leg portion includes a protruding rubber portion that is formed on the side surface on the other end side that is insert-molded on the inner peripheral side of the insertion hole of the bracket member and protrudes from the outer surface of the bracket member,
The protruding rubber part includes a flat surface-shaped sealing surface part located on the outer edge side, and a stopper surface part that is connected to the sealing surface part via a step and protrudes from the sealing surface part by the step.
The other end side of the anti-vibration leg is accommodated in the cavity into which the resin material is injected and the stopper surface portion of the protruding rubber portion by the pressing surface portion of the resin molding die pressing the seal surface portion of the protruding rubber portion. An anti-vibration device that is insert-molded on the inner peripheral side of the insertion hole of the bracket member in a state in which the space is defined. A cylindrical inner cylinder member attached to one of the vibration generator side or the vehicle body side, and an insertion hole into which the inner cylinder member is inserted and arranged, are made of a resin material, and are arranged on the vibration generator side or the vehicle body side. A bracket member to be attached to the other, and a pair of protection members made of a rubber-like elastic body having one end connected to the outer peripheral surface of the inner cylinder member and the other end connected to the inner peripheral side of the insertion hole of the bracket member. In the manufacturing method of the vibration isolator for manufacturing the vibration isolator including the swing leg portion,
By injecting a rubber-like elastic body into the cavity of the rubber vulcanization mold in which the inner cylinder member is installed and vulcanizing and molding, one end side of the pair of vibration isolation legs is placed on the outer peripheral surface of the inner cylinder member. A rubber vulcanization step for molding the first vulcanized and bonded product,
The other end of the anti-vibration leg portion of the first molded body is formed by injecting a resin material into a cavity of a resin molding die in which the first molded body molded by the rubber vulcanization step is installed and solidifying the resin material. A resin molding step of insert-molding the side to the inner peripheral side of the insertion hole of the bracket member,
The first molded body molded by the rubber vulcanization process is formed on the side surface on the other end side of the vibration isolating leg portion that is insert-molded on the inner peripheral side of the insertion hole of the bracket member. A protruding rubber portion that protrudes from the outer surface of the flat surface, and the protruding rubber portion is connected to the flat sealing surface portion located on the outer edge side, and the seal surface portion via a step. A stopper surface portion protruding from the surface portion,
The resin molding die used in the resin molding step includes a pressing surface portion that presses a sealing surface portion in the protruding rubber portion of the first molded body, and the pressing surface portion presses the sealing surface portion, thereby the resin material. A method for manufacturing an anti-vibration device, comprising: partitioning a cavity into which water is injected and a space in which the stopper surface portion of the protruding rubber portion of the first molded body is accommodated. The vibration isolator includes an outer member embedded in the other end side of the vibration isolating leg and made of a metal material and at least a part of which is engaged with the bracket member.
In the rubber vulcanization step, a rubber-like elastic body is injected into a cavity of a rubber vulcanization mold in which the outer member is installed together with the inner cylinder member, and vulcanization molding is performed. The one end side is connected to the outer peripheral surface of the inner cylinder member and the outer member is embedded in the other end side of the pair of vibration isolation legs,
The said resin molding process presses the area | region where the press surface part of the said resin mold is a seal surface part of the said protrusion rubber part, and overlaps at least one part of the said outer member. A method of manufacturing a vibration isolator.   The resin molding die used in the resin molding step has a predetermined gap between a vertical wall continuous to the pressing surface portion and a step between the sealing surface portion and the stopper surface portion of the first molded body. The manufacturing method of the vibration isolator of Claim 2 or 3.

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