JP6208947B2 - Vibration isolator and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vibration isolator used, for example, as an engine mount and a method for manufacturing the same.

  Conventionally, an anti-vibration device called an engine mount that is provided between an engine of an automobile and a vehicle body and supports the anti-vibration of the engine is known. For example, Patent Document 1 discloses a first attachment attached to an engine. An anti-vibration device in which the stopper rubber attached to the member abuts against a stopper member fixed to a second attachment member attached to the vehicle body, thereby restricting movement of the first attachment member to the vehicle upper side. Have been described.

JP 2011-247332 A

However, in the above conventional vibration isolator, the stopper rubber is formed separately from the elastic member and is attached to the first mounting member. There has been a problem that the manufacturing cost of the apparatus becomes high.
Further, the conventional vibration isolator has a structure in which the first mounting member is inserted into the recess of the elastic member and the first mounting member is supported by the elastic member without bonding the first mounting member to the elastic member. In addition, when a large load is applied to the first mounting member and the elastic member is greatly elastically deformed, there is a problem that the retaining property of the first mounting member by the elastic member is lowered.

An object of the present invention is to solve such problems of the prior art, and an object of the present invention is to provide a vibration isolator capable of stably holding an engine bracket by an elastic member. To provide at a cost.

In the vibration isolator of the present invention, the engine bracket is formed integrally with the attachment portion to either one of the vibration generating side member or the vibration receiving side member and the attachment portion, and is embedded in the elastic member and the elastic member. Embedded part having a recessed portion into which a part of the elastic member is inserted, and the elastic member is held by a second mounting member and disposed between the second mounting member and the embedded part, A stopper portion formed integrally with the main body portion, and the stopper portion is disposed on the opposite side of the main body portion across the embedded portion, and the embedded portion penetrates along the main vibration direction. has a through hole, the through hole is characterized that you have been filled with the elastic member integral with said body portion and said stopper portion.
According to the present invention, since the embedded portion provided in the engine bracket is embedded in the elastic member and part of the elastic member is inserted into the recessed portion provided in the embedded portion, the engine bracket is not bonded to the elastic member. In addition, the followability of the elastic member to the embedded portion with respect to the displacement of the engine bracket can be improved, and the retainability of the engine bracket by the elastic member can be improved. In addition, by embedding the embedded portion provided in the engine bracket in the elastic member, the main body portion and the stopper portion of the elastic member can be integrally configured, so that the number of parts and manufacturing man-hours can be reduced to manufacture the vibration isolator. Cost can be reduced. Therefore, the vibration isolator that can stably hold the engine bracket by the elastic member can be provided at low cost.

In the vibration isolator of the present invention, the buried portion includes a buried portion main body, and a frustum portion having a truncated cone shape that protrudes from the buried portion main body toward the second mounting member along the main vibration direction. It is preferable that the recess is provided along the outer peripheral surface of the frustum portion.
According to this configuration, when the first mounting member is displaced in the direction perpendicular to the main vibration direction, the first mounting member can be firmly held by the elastic member by the frustum portion, and the first mounting member and the first mounting member 2 When a load is applied between the mounting member and the mounting member in the direction of approaching the main vibration direction, the main body portion of the elastic member is displaced toward the embedded portion main body along the outer peripheral surface of the frustum portion. Since the main body of the displaced elastic member can be supported by the recess, the retainability of the first mounting member by the elastic member can be further enhanced. The main vibration direction is a direction in which the embedded portion of the first attachment member and the second attachment member approach and separate with the main body portion of the elastic member interposed therebetween.

In the vibration isolator of the present invention, the concave portion is preferably formed in an annular shape along the entire circumference of the outer peripheral surface of the frustum portion.
According to this configuration, the main body portion of the elastic member that has entered the embedding portion main body side along the frustum portion can be supported by the recess in the entire circumference of the outer peripheral surface of the frustum portion. The retainability of the first mounting member can be further enhanced.

In the vibration isolating apparatus of the present invention, the embedded portion is that having a through hole penetrating along the main vibration direction.
According to this configuration, by connecting the main body portion of the elastic member and the stopper portion with the portion of the elastic member that has entered the through hole of the embedded portion, the main body portion and the stopper portion that are located across the embedded portion are interlocked. Since the elastic member can be elastically deformed, the followability of the elastic member to the displacement of the engine bracket can be enhanced, and the retainability of the engine bracket by the elastic member can be further enhanced. In particular, when a load is applied between the engine bracket and the second mounting member in the direction of separating them along the main vibration direction, the main body portion of the elastic member is connected to the stopper portion through the through hole. Therefore, a drag force that suppresses the separation between the main body portion and the stopper portion is generated, and the action becomes remarkable.

In the vibration isolator of the present invention, the second mounting member has a bottomed cylindrical shape, and is provided with a constricted portion having a diameter smaller than that of the bottom wall at the opening end, and the main body portion of the elastic member is the second mounting member. It is preferable to provide a large-diameter portion disposed between the bottom wall and the constricted portion.
According to this configuration, the elastic member can be securely held by the second mounting member without being bonded to the second mounting member.

In the vibration isolator of the present invention, the second mounting member has a bottomed cylindrical shape, the base end of the main body portion of the elastic member is formed in a cylindrical shape, and the bottom wall of the second mounting member is on the side of the main body portion. It is preferable to provide a boss portion that protrudes toward.
According to this configuration, the elastic member can be securely held by the second mounting member without being bonded to the second mounting member.

Method for manufacturing a vibration isolation device of the present invention is a method of manufacturing a vibration isolator for manufacturing the vibration damping device, by embedding the embedded portion of the engine bracket to said elastic member and said resilient member and said engine bracket And a mounting step of mounting the main body portion of the elastic member integrated with the engine bracket to the second mounting member.
According to this manufacturing method, the vibration isolator of the present invention can be easily manufactured.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration isolator which can hold | maintain a 1st attachment member stably with an elastic member can be provided at low cost.

It is sectional drawing which shows the support structure to the vehicle body of the engine using the engine mount which is one embodiment of this invention. It is sectional drawing which follows the AA line in FIG. It is a perspective view of the engine bracket shown in FIG. It is a perspective view which shows the assembly procedure of the engine mount shown in FIG. It is sectional drawing which shows the modification which provided the constriction part and the boss | hub part in the body bracket with the engine mount shown in FIG. It is sectional drawing which shows the modification which provided the some recessed part formed in the engine mount shown in FIG. 2 as a through-hole in the rubber body. It is a perspective view which shows the modification of a rubber body and an engine bracket.

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

  FIG. 1 shows a case where the vibration isolator according to the present invention is configured as an engine mount 3 provided between an engine 1 and a vehicle body 2 of an automobile and supporting the engine 1 on the vehicle body 2 as an embodiment. Show.

  The engine mount 3 includes an engine bracket 4 as a first attachment member. As shown in FIGS. 1 to 3, the engine bracket 4 is formed in a substantially T shape in which the mounting portion 5 and the embedded portion 6 are integrated with each other by a metal material such as a steel material or an aluminum alloy. The attachment portion 5 is provided with three attachment holes 5a. The engine bracket 4 is attached to the engine 1 which is a vibration generating side member in the attachment portion 5 by fastening means (not shown) such as bolts inserted through the attachment holes 5a. Fixed. In a state where the engine bracket 4 is fixed to the engine 1, the embedded portion 6 is in a horizontal posture with respect to the mounting portion 5 so as to extend in the vehicle horizontal direction. Details of the embedded portion 6 will be described later.

  The engine mount 3 includes a body bracket 7 as a second mounting member. The body bracket 7 is formed in a bottomed cylindrical shape including a cylindrical side wall 8 made of a metal material such as a steel plate and a bottom wall 9 provided at one end of the side wall 8 and having a through hole in the center, for example. A pair of leg portions 10 are fixed to the outer peripheral surface of the side wall 8. The body bracket 7 is attached to the vehicle body 2 that is a vibration receiving member in a posture in which the opening is directed to the vehicle upper side by fixing these leg portions 10 to the vehicle body 2 by fixing means such as welding or caulking. .

The engine bracket 4 and the body bracket 7 are connected by a rubber body 11 as an elastic member. As the elastic member, a member formed of a thermoplastic elastomer or the like can be used instead of the rubber body 11.
The rubber body 11 has a head portion 12 formed in a square shape, and an embedded portion 6 of the engine bracket 4 is embedded in the head portion 12. The engine bracket 4 protrudes from the side surface of the head portion 12 of the rubber body 11 facing the vehicle horizontal direction, that is, the rubber body 11 is supported from the side.
The rubber body 11 is integrally provided with a main body portion 13 that extends from the head portion 12 toward the body bracket 7 side, that is, the vehicle lower side, and is disposed between the embedded portion 6 of the engine bracket 4 and the body bracket 7. ing. The main body 13 of the rubber body 11 has a conical portion 13a whose outer diameter gradually increases toward the vehicle lower side, and a base end (lower end in the figure) is a cylinder having a hollow portion 13b inside. The large diameter portion 13c is formed. The outer diameter of the large diameter portion 13 c is slightly larger than the inner diameter of the side wall 8 of the body bracket 7, and the rubber body 11 has the main body portion 13 formed by press-fitting the large diameter portion 13 c into the body bracket 7. Is held by the body bracket 7 in a state in which the axial center of this is aligned with the axis of the body bracket 7.

As described above, the embedded portion 6 of the engine bracket 4 is embedded in the head portion 12 of the rubber body 11 and the large-diameter portion 13 c provided in the main body portion 13 of the rubber body 11 is held by the body bracket 7. The bracket 4 and the body bracket 7 are connected by a rubber body 11. The load of the engine 1 applied to the engine bracket 4 is elastically supported by the rubber body 11 held by the body bracket 7, and the vibration of the engine 1 is absorbed by the rubber body 11 and transmission to the vehicle body 2 is suppressed. . That is, the direction in which the embedded portion 6 of the engine bracket 4 and the body bracket 7 approach and separate from each other with the rubber body 11 interposed therebetween is the main vibration direction of the engine mount 3, and the vibration in the main vibration direction is absorbed by the rubber body 11. The The main vibration direction coincides with the axial direction of the body bracket 7.
When the load of the engine 1 is applied to the main body portion 13 of the rubber body 11, the large diameter portion 13c is elastically deformed in the direction of increasing the diameter, and the main body portion 13 of the rubber body 11 is securely held by the body bracket 7. Will be. The body bracket 7 may not be bottomed as long as it can support the rubber body 11.

  As shown in FIGS. 1 and 2, a stopper bracket 14 as a stopper member is fixed to the body bracket 7. The stopper bracket 14 is formed in a gate shape with, for example, a steel plate, and a pair of leg portions 14a are fixed to the leg portions 10 of the body bracket 7 by fixing means such as welding or caulking. A portion between the leg portions 14a of the stopper bracket 14 serves as a stopper wall 14b. The stopper wall 14b is disposed with a space on the vehicle upper side with respect to the body bracket 7 and is disposed on the embedded portion 6 of the engine bracket 4. It is bridged upward and surrounds the buried portion 6. The shape of the stopper bracket 14 can be variously modified as long as it has a stopper wall 14b facing the upper surface of the embedded portion 6 of the engine bracket 4.

  A part of the head portion 12 of the rubber body 11 disposed so as to cover the upper surface of the embedded portion 6 of the engine bracket 4, that is, the surface of the engine bracket 4 facing away from the body bracket 7 is formed integrally with the main body portion 13. The stopper portion 15 is made. That is, the stopper portion 15 is disposed on the opposite side of the main body portion 13 with the embedded portion 6 interposed therebetween. The stopper portion 15 is disposed between the embedded portion 6 of the engine bracket 4 and the stopper wall 14b of the stopper bracket 14 and can come into contact with the stopper wall 14b. When the stopper 15 abuts against the stopper wall 14b, the movement of the engine bracket 4 away from the body bracket 7, that is, the upward movement of the vehicle is restricted to a predetermined range.

In order to securely support the engine 1 on the vehicle body 2 by the engine mount 3, it is necessary to stably hold the engine bracket 4 on the rubber body 11. Therefore, in the present invention, the recessed portion 16 is provided in the embedded portion 6 of the engine bracket 4 embedded in the head portion 12 of the rubber body 11, and a part of the rubber body 11 is inserted into the recessed portion 16.
In the present embodiment, the embedded portion 6 of the engine bracket 4 includes an embedded portion main body 17 formed in a rectangular parallelepiped shape as shown in FIG. 3, and the vehicle bracket 7 side of the embedded portion main body 17, that is, the vehicle A recess 16 is provided on the surface facing downward. The recessed portion 16 is provided on the surface of the embedded portion main body 17, and by inserting a part of the rubber body 11 into the recessed portion 16, the embedded portion 6 is hardly displaced with respect to the rubber body 11. The engine bracket 4 can be stably held on the rubber body 11 without bonding.

  Further, in the present embodiment, the frustum portion 18 is integrally provided in the buried portion 6 in addition to the buried portion main body 17. The frustum portion 18 is formed in a frustum shape whose axis coincides with the axis of the body bracket 7, and extends from the embedded portion body 17 along the axial direction of the body bracket 7 to the body bracket 7 side, that is, the vehicle lower side. Protruding while gradually decreasing the outer diameter toward. The recess 16 is formed on the surface of the embedded portion main body 17 along the outer peripheral surface 18 a of the frustum portion 18. In the present embodiment, as shown in FIG. 3, the recess 16 is annularly provided along the entire circumference of the outer peripheral surface 18 a of the frustum portion 18, that is, the recess 16 is the root portion of the frustum portion 18. It is formed as an annular groove surrounding the entire circumference. 3 shows the engine bracket 4 shown in FIGS. 1 and 2 upside down.

  By providing the embedded portion 6 with the frustum portion 18 protruding along the axial direction of the body bracket 7, the displacement of the engine bracket 4 in the vehicle horizontal direction orthogonal to the axial direction of the body bracket 7 is transmitted to the rubber body 11. Thus, the rubber body 11 can reliably support the displacement of the engine bracket 4 in the vehicle horizontal direction. Further, the load of the engine 1 applied to the engine bracket 4 is elastically supported by the rubber body 11, and the main body portion 13 of the rubber body 11 between the embedded portion 6 of the engine bracket 4 and the body bracket 7 extends along the axial direction of the body bracket 7. When elastically deforming in the shrinking direction, the portion around the frustum portion 18 of the main body portion 13 of the rubber body 11 sinks into the embedded portion main body 17 side along the outer peripheral surface 18a of the frustum portion 18, but the submerged main body The portion 13 is supported by the recess 16 provided on the surface of the embedded portion main body 17 along the outer peripheral surface 18 a of the frustum portion 18, and is maintained in a state along the outer peripheral surface 18 a of the frustum portion 18. Furthermore, even if a displacement in a direction perpendicular to the axial direction of the body bracket 7 is applied to the engine bracket 4, a part of the main body 13 of the rubber body 11 enters the recess 16, so that the main body 13 is embedded in the embedded portion 6. Can be followed. Therefore, without adhering the embedded portion 6 to the rubber body 11, it is possible to prevent the embedded portion 6 from being displaced with respect to the head portion 12 and the main body portion 13, and to stably hold the engine bracket 4 on the rubber body 11. Can do.

  The depth dimension of the recess 16 from the surface of the embedded portion main body 17 to the deepest portion in the direction along the axial direction of the body bracket 7 is preferably 5 mm or more. By setting the recess 16 to a depth of 5 mm or more, the main body 13 of the rubber body 11 deteriorates due to repeated load from the engine 1, and a gap is generated between the main body 13 and the inner surface of the recess 16. Even if it exists, when the rubber body 11 receives a load in the vertical direction, the main body portion 13 is prevented from coming out of the recess 16, and the embedded portion 6 of the engine bracket 4 is displaced with respect to the rubber body 11. Can be reliably prevented.

  In the present embodiment, a fixing hole 19 is further provided in the embedded portion 6 of the engine bracket 4 in addition to the concave portion 16 provided in the root portion of the frustum portion 18. The fixing hole 19 is formed in a through-hole penetrating the shaft center of the frustum portion 18 and the embedded portion main body 17 along the axial direction of the body bracket 7, and a part of the rubber body 11 is disposed therein. Yes. A part of the rubber body 11 arranged in the fixing hole 19 is integrated with the main body part 13 and the stopper part 15, and accordingly, the main body part of the rubber body 11 is formed by a part of the rubber body 11 arranged in the fixing hole 19. 13 and the stopper portion 15 are connected with the embedded portion 6 interposed therebetween. As a result, the embedded portion 6 of the engine bracket 4 is sandwiched between the main body portion 13 and the stopper portion 15 that are located across the embedded portion 6, thereby further improving the followability of the rubber body 11 to the embedded portion 6. it can.

  In the case shown in the figure, the fixing hole 19 has a larger inner diameter at a portion that penetrates the embedded portion body 17 than an inner diameter at a portion that penetrates the frustum portion 18. As a result, when the fixing hole 19 is formed by, for example, casting using a mold, it is possible to use a pin having a thick base as a pin provided in the mold for forming the fixing hole 19. Breaking can be prevented. The fixed hole 19 may have a constant inner diameter in all parts, or may have a gradually decreasing inner diameter from the upper side to the lower side.

  Next, a method for manufacturing the engine mount 3 according to the embodiment of the present invention as described above will be described.

  First, an engine bracket 4 formed in a predetermined shape by casting or the like is prepared in advance, and an embedded portion 6 of the engine bracket 4 is disposed inside a mold (not shown) for vulcanizing and molding the rubber body 11. To do. In this state, the unvulcanized rubber is vulcanized and molded by the mold, so that the engine bracket 4 and the rubber body 11 in which the embedded portion 6 of the engine bracket 4 is embedded in the head portion 12 as shown in FIG. An integrated unit is formed (integration step). By the integration step, the rubber body 11 can be integrated with the embedded portion 6 of the engine bracket 4 without bonding without performing a base treatment or adhesive application on the surface of the embedded portion 6 of the engine bracket 4.

  Next, a body bracket 7 previously formed of sheet metal or the like is prepared, and the large-diameter portion 13c of the rubber body 11 integrated with the engine bracket 4 is press-fitted into the body bracket 7 using a press-fitting machine or the like. To do. Thereby, the rubber body 11 integrated with the engine bracket 4 is attached to the body bracket 7 (attachment process). Through the mounting process, the large diameter portion 13c of the rubber body 11 can be mounted on the body bracket 7 by press-fitting without using an adhesive. In the configuration in which the rubber body 11 is attached to the body bracket 7 without bonding, the rubber body 11 may be rubbed against the body bracket 7 to generate noise, so that the rubber body 11 is used to reduce the noise. A self-lubricating rubber having good slipperiness may be used.

  With such a manufacturing method, the engine bracket 4 and the body bracket 7 can be securely connected to the rubber body 11 without adhering the engine bracket 4 and the body bracket 7 to the rubber body 11, and the rubber body 11 The engine mount 3 in which the main body portion 13 and the stopper portion 15 are integrated can be easily manufactured.

  Subsequent to the mounting step, a stopper fixing step of fixing the stopper bracket 14 to the body bracket 7 by fixing means such as welding or caulking is performed. Thereby, the engine mount 3 is completed.

  The engine mount 3 manufactured by such a manufacturing method is such that the body bracket 7 is fixed to the vehicle body 2 together with the stopper bracket 14 by fastening means such as welding, caulking, and screwing in the vehicle assembly process, and then tightened with bolts or the like. The engine bracket 4 is fixed to the engine 1 using the means and assembled to the vehicle.

  FIG. 5 is a sectional view showing a modification of the engine mount 3 shown in FIG. In FIG. 5, members corresponding to those described above are denoted by the same reference numerals.

  In the engine mount 3 shown in FIG. 2, the side wall 8 of the body bracket 7 is formed in a cylindrical shape having a constant inner diameter. On the other hand, in the modification shown in FIG. 5, a narrowed portion 20 is provided at the opening end of the side wall 8 of the body bracket 7 so that the diameter of the opening end of the body bracket 7 is reduced. Yes. The narrowed portion 20 is provided over the entire circumference of the opening end of the side wall 8, and the inner diameter dimension thereof is smaller than the inner diameter dimension of the side wall 8 on the bottom wall 9 side. Therefore, the constricted portion 20 protrudes radially inward with respect to the side wall 8 to reduce the diameter of the opening end of the body bracket 7.

  The bottom wall 9 of the body bracket 7 is integrally provided with a boss portion 21 that protrudes toward the vehicle upper side. The boss portion 21 is formed in a circular shape centering on the axis of the bottom wall 9, protrudes toward the main body portion 13 side, that is, the inside of the large diameter portion 13 c, and is fitted inside the large diameter portion 13 c. ing.

In this modification, the main body portion 13 of the rubber body 11 has a large-diameter portion 13c that is in contact with the inner surface of the side wall 8 of the body bracket 7 and is disposed between the narrowed portion 20 and the bottom wall 9 and the side wall. 8 and the boss portion 21 and is held by the body bracket 7. In this way, the large diameter portion 13c of the rubber body 11 is held between the narrowed portion 20 and the bottom wall 9 in the axial direction (vertical direction), and the side wall 8 and the boss portion 21 in the radial direction. Since it hold | maintained between, the main-body part 13 of the rubber body 11 can be reliably hold | maintained to the body bracket 7, without using an adhesive material.
In the illustrated modification, the body bracket 7 is provided with both the narrowed portion 20 and the boss portion 21. However, the present invention is not limited to this, and either the narrowed portion 20 or the boss portion 21 is provided in the body bracket 7. Only one can be provided.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Furthermore, in the said embodiment, although the embed | buried part 6 of the engine bracket 4 is made into the shape which has the embed | buried part main body 17 and the frustum part 18 in which the recessed part 16 is formed, not only this but the embed | buried part 6 is a recessed part. If it has 16 and is embed | buried under the rubber body 11, it can be set as arbitrary shapes.

  Furthermore, in the above-described embodiment, the frustum portion 18 provided in the embedded portion 6 of the engine bracket 4 is formed in a frustum shape. However, the present invention is not limited to this, and for example, as shown in FIG. When the rubber body 11 as a member having a uniform cross section extending along the embedded portion main body 17 in the direction perpendicular to the main vibration direction is used, the frustum portion 18 of the embedded portion 6 is It can also be formed in a truncated cone shape extending along the shape of the rubber body 11. Also in this case, it is possible to provide the embedded portion 6 with a fixing hole 19 as a through hole that penetrates the embedded portion 6 in the main vibration direction.

  Further, in the above-described embodiment, the engine bracket 4 is configured to protrude from the head portion 12 of the rubber body 11 toward the side. However, the present invention is not limited thereto, and the engine bracket 4 is configured to protrude from the head portion of the rubber body 11. It can also be set as the structure which protrudes toward the axial direction upper side of the body bracket 7, ie, vehicle upper side, from 12. In this case, the embedded portion 6 of the engine bracket 4 is formed in a shape having a surface facing the stopper wall 14b so that the stopper portion 15 of the rubber body 11 can be sandwiched between the stopper wall 14b.

  Furthermore, in the above-described embodiment, the recess 16 is formed in an annular shape along the outer peripheral surface 18a of the frustum portion 18. However, the present invention is not limited to this, and a plurality of recesses 16 are formed along the outer peripheral surface 18a of the frustum portion 18. The recesses 16 may be arranged around the frustum portion 18 with an interval.

  Furthermore, in the said embodiment, although the recessed part 16 is cyclically | annularly formed along the outer peripheral surface 18a of the frustum part 18, if the recessed part 16 is formed in the embed | buried part 6, its position, shape Etc. can be arbitrarily set. In addition, the concave portion 16 can be provided as a through hole that penetrates the embedded portion 6. In this case, as shown in FIG. 6, in addition to or instead of the recess 16 formed in an annular shape along the outer peripheral surface 18a of the frustum portion 18, the body bracket extends along the outer peripheral surface 18a of the frustum portion 18. 7 may be provided around the frustum portion 18 at intervals. The recesses 16 may be through-holes penetrating along the seven axial directions.

  Further, in the above embodiment, the stopper bracket 14 is fixed to the body bracket 7, but after the engine mount 3 is fixed to the vehicle body 2 except for the stopper bracket 14, the stopper bracket 14 is the stopper of the rubber body 11. The structure fixed to the body bracket 7 via the vehicle body 2 so that the part 15 may be enclosed may be sufficient.

  Further, in the above-described embodiment, the rubber body 11 is configured to be held without being bonded to the engine bracket 4 and the body bracket 7. In order to improve the followability of the bracket 7, the rubber body 11 may be bonded to the engine bracket 4 and the body bracket 7 using an adhesive or the like.

1: Engine (vibration generating side member) 2: Vehicle body (vibration receiving side member) 3: Engine mount (vibration isolation device) 4: Engine bracket (first mounting member) 5: Mounting portion 6: Buried portion 7: Body bracket ( (Second mounting member) 9: bottom wall 11: rubber body (elastic member) 13: main body portion 13c: large diameter portion 14: stopper bracket (stopper member) 15: stopper portion 16: recessed portion 17: buried portion main body 18: frustum Part 18a: Outer peripheral surface 19: Fixing hole (through hole) 20: Constricted part 21: Boss part

Claims (6)

An engine bracket attached to either the vibration generating member or the vibration receiving member;
A second attachment member attached to either the vibration generating side member or the vibration receiving side member;
An anti-vibration device having an elastic member connecting the engine bracket and the second mounting member,
The engine bracket is
An attachment portion to either one of the vibration generating side member or the vibration receiving side member;
An embedded portion that is formed integrally with the mounting portion and is embedded in the elastic member and has a recess into which a part of the elastic member enters;
The elastic member is
A main body portion held between the second mounting member and disposed between the second mounting member and the embedded portion; and a stopper portion formed integrally with the main body portion;
The stopper portion is disposed on the opposite side of the main body portion across the embedded portion ,
The buried portion has a through-hole penetrating along the main vibration direction,
The through holes, the vibration damping device, characterized that you have been filled with the elastic member integral with said body portion and said stopper portion.   The buried portion includes a buried portion main body and a frustum portion having a truncated cone shape that protrudes from the buried portion main body toward the second mounting member along a main vibration direction, and the concave portion is the frustum. The vibration isolator according to claim 1, which is provided along the outer peripheral surface of the base portion.   The anti-vibration device according to claim 2, wherein the concave portion is formed in an annular shape along the entire circumference of the outer peripheral surface of the frustum portion. The second mounting member has a bottomed cylindrical shape, and includes a constricted portion having a diameter smaller than that of the bottom wall side at an opening end, and the main body portion of the elastic member includes the bottom wall of the second mounting member and the constricted portion. The vibration isolator of any one of Claims 1-3 provided with the large diameter part arrange | positioned between. The second mounting member has a bottomed cylindrical shape, the base end of the main body portion of the elastic member is formed in a cylindrical shape, and the bottom wall of the second mounting member has a boss portion protruding toward the main body portion side. The vibration isolator of any one of Claims 1-4 provided. A vibration isolator manufacturing method for manufacturing the vibration isolator according to claim 1,
An integration step of embedding a buried portion of the engine bracket in the elastic member and integrating the elastic member and the engine bracket;
And a mounting step of mounting a main body portion of the elastic member integrated with the engine bracket on the second mounting member.