JPWO2017145221A1 - Vibration isolator bracket and vibration isolator using the same - Google Patents

Abstract

Provided is a bracket for a vibration isolator having a novel structure which can achieve both high rigidity and light weight and can be easily put into practical use. In the vibration isolator bracket (16) for attaching the vibration isolator body (14) including the rubber elastic body (12) to the vibration member (18), the vibration isolator body (14) is held. It has a main body holding part (40), a main body side thick member (34) made of light metal or synthetic resin, and a fitting part (54) having a groove-like recess, and the material is iron. And a fixing leg member (36) that is thinner than the main body side thick member (34) and is formed of the base metal side thick member (34). An assembly portion (42) to be fitted into the fitting portion (54) is provided, and the body-side thick member (34) and the assembly-side portion (42) are fitted into the fitting portion (54). A fastening part (61) for fastening the fixing leg member (36) to each other is provided.

Description

  The present invention relates to a vibration isolator bracket for attaching a vibration isolator main body such as an engine mount to a vibration member, and a vibration isolator using the same.

  2. Description of the Related Art Conventionally, as an anti-vibration device such as various mounts and dampers used in automobiles, an anti-vibration device body including a rubber elastic body is known. Further, in such a vibration isolator, a bracket is used when attaching to a vibration member constituting a vibration system.

  A general structure of a vibration isolator bracket is disclosed in Japanese Unexamined Patent Application Publication No. 2002-181101 (Patent Document 1) and Japanese Unexamined Patent Application Publication No. 2010-184626 (Patent Document 2). These conventional anti-vibration device brackets are generally metal brackets manufactured by processing an iron-based metal plate by press molding and welding.

  By the way, along with the advancement of required performance of automobiles and the like, in recent years, there has been a demand for further increase in rigidity and weight of the vibration isolator bracket.

  However, with a metal bracket that has been processed from an iron-based metal fitting with a conventional structure, increasing the thickness and improving the rigidity increases the weight, making it difficult to achieve both the required high rigidity and light weight. .

  On the other hand, Japanese Patent Application Laid-Open No. 2010-111204 (Patent Document 3) proposes a bracket for an anti-vibration device having an integral structure made of die-cast aluminum alloy. In such brackets, it has been studied to achieve high rigidity while suppressing an increase in weight by adopting an aluminum alloy having a specific gravity smaller than that of iron.

  However, in die casting of aluminum alloy or the like, as described in Patent Document 3 above, if an attempt is made to manufacture a vibration isolator bracket having a complicated shape as a whole including the fixing portion, a mold is manufactured. Therefore, it is difficult to avoid an increase in time and cost required for manufacturing.

  In addition, there is also a bracket shape in which the fixing part attached to the vibration member greatly extends outward from the attachment part of the vibration isolator main body, so that the die casting mold is enlarged and the manufacturing equipment is enlarged and further Costs are likely to increase, and it may be difficult to ensure molding accuracy. Therefore, there is a problem that the aluminum die-cast bracket is difficult to put into practical use.

JP 2002-181101 A JP 2010-184626 A JP 2010-111204 A

  Here, the present invention has been made against the background as described above, and the problem to be solved is that both high rigidity and light weight can be achieved, and practical application can be easily achieved. The object is to provide a vibration isolator bracket having a novel structure and a vibration isolator using the same.

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

  According to a first aspect of the present invention, there is provided a vibration isolator bracket for attaching a vibration isolator main body configured to include a rubber elastic body to a vibration member. (I) A main body holding on which the vibration isolator main body is held A body-side thick member made of a light metal or a synthetic resin, and (ii) a fitting portion having a groove-like recess, and the material is an iron-based metal, A fixing leg member that is thinner than the thick member, and (iii) an assembly portion that is fitted into the fitting portion of the fixing leg member in the main body side thick member is provided. And a vibration isolator bracket provided with a fastening portion for fastening the main body side thick member and the fixing leg member to each other in a state where the assembly portion is fitted into the fitting portion. It is a feature.

  According to this aspect, the vibration isolator bracket is configured with a composite structure of the main body side thick member made of light metal or synthetic resin and the fixing leg member made of iron-based metal. And, with the fixing leg member, the load-bearing performance required for the fixing part to the vibrating member can be secured by utilizing the large strength characteristics of iron-based metal and easy workability by pressing, etc. It is possible to cope with a complicated shape including a mounting portion and a large size. On the other hand, the body-side thick member that reduces the local concentrated load when a load is input through the rubber elastic body can be reduced in weight by light metal or rigid resin, and is thicker than iron-based metal. Since securing the thickness dimension and increasing the degree of freedom in setting the shape, the required strength and rigidity are ensured by the member thickness, and it becomes easy to handle various shapes necessary for the holding part of the vibration isolator body. .

  In addition, a specific joining structure in which the fitting structure and the fastening structure are combined is adopted at the joining portion between the main body side thick member made of a different material and the fixing leg member. As a result, local stress concentration in the joint was dispersed by the fitting structure to ensure the overall joint strength, while ensuring a reliable joint state with the fastening structure, and also achieved joint reliability. .

  Therefore, in the vibration isolator bracket having the structure according to this aspect, the basic structure of strength and rigidity required for attaching the vibration isolator main body to the vibration member by adopting the composite structure in which the specific part is made non-ferrous. The overall weight reduction is achieved while sufficiently securing the performance, and the cost can be reduced as compared with the case where the whole is manufactured by integral molding of a synthetic resin material or the like.

  According to a second aspect of the present invention, there is provided the vibration isolator bracket according to the first aspect, wherein the fitting portion opens to the main body holding portion side with a two-sided width and the assembly portion is fitted. It is a shape.

  According to the vibration isolator bracket having a structure according to the present aspect, positioning is performed so that the assembly portion is sandwiched from both sides by the concave side wall portions of the attachment portion. The inserted state can be maintained more stably.

  A third aspect of the present invention is the vibration isolator bracket according to the second aspect, wherein the fitting portion includes a pair of fitting walls opposed to each other with a two-sided width. The assembly portion is fitted between opposing surfaces of the attachment wall, and the opposing surfaces of the pair of attachment walls are overlapped with the assembly portion in a contact state.

  According to the vibration isolator bracket having the structure according to this aspect, since the fitting wall is overlapped on both sides of the assembling portion in a contact state, the assembling portion is fitted to the fitting portion with a gap. Compared to the inserted state, the main body side thick member and the fixing leg member can be more accurately and reliably connected.

  In this aspect, the pair of fitting walls are formed by pressing or the like so as to form a concave fitting portion in the fixing leg member in advance, and are assembled between the opposing surfaces of the pair of fitting walls. With the press-fit structure for fitting the attachment part, the assembly part can be fitted into the attachment part. Alternatively, the mounting portion is configured by forming a pair of mounting walls so as to be sandwiched from both sides of the mounting portion by pressing or the like in a state where the mounting portion is previously arranged at a predetermined position with respect to the fixing leg member. By doing this, the assembly part may be brought into the fitted state almost simultaneously with the completion of the fitting part.

  According to a fourth aspect of the present invention, in the vibration isolator bracket according to any one of the first to third aspects, the fastening for fastening the main body side thick member and the fixing leg member to each other A fastening bolt hole provided between the assembly portion of the main body side thick member and the fitting portion of the fixing leg member, and a fastening bolt inserted through the fastening bolt hole Are included.

  According to the vibration isolator bracket having the structure according to this aspect, the fitting structure between the assembled portion and the fitting portion is directly maintained by the bolt in the assembled portion of the main body side thick member and the fixing leg member. As a result, both members can be fastened securely and easily. In particular, by combining with the third aspect, it becomes possible to exert a tightening force of the fastening bolts in a direction in which the pair of fitting walls are sandwiched with respect to the assembling part, and the fitting structure and the fastening structure are used. A synergistic improvement in fixing strength can be achieved. The number of fastening bolts is not limited.

  According to a fifth aspect of the present invention, in the vibration isolator bracket according to the fourth aspect, the vibration isolator main body is connected to the main body side thick member via the rubber elastic body. The mounting member is fixed to one member constituting the vibration transmission system, and is fixed to the other member constituting the vibration transmission system at the fixing leg member. The fixing bolt for fixing the mounting member to the one member constituting the vibration transmission system is arranged in parallel with the fastening bolt.

  According to the vibration isolator bracket having the structure according to this aspect, the fixing bolt and the fastening bolt are disposed in the same direction, so that not only the workability when mounting each bolt is improved. This makes it easy to design and check the strength characteristics of both bolts. For example, it is more preferable to provide the same number of fixing bolts and fastening bolts of the same size, thereby improving the load resistance performance against external force exerted on the vibration isolator bracket between members constituting the vibration transmission system. In consideration, it becomes easy to optimally set both the fixing bolt and the fastening bolt.

  According to a sixth aspect of the present invention, in the vibration isolator bracket according to any one of the first to fifth aspects, the main body side thick member has a thick cylindrical shape, and the main body side The vibration isolator main body is arranged in the inner hole of the thick member.

  In the vibration isolator bracket structured according to this aspect, the main body side thick member is disposed so as to surround the outer periphery of the rubber elastic body, and the deformation amount of the rubber elastic body is applied to the main body side thick member. It is possible to limit by contact, and the strength can be more effectively ensured by making the main body side thick member cylindrical. In this aspect, the vibration isolator main body is, for example, a cylindrical mount in which an inner shaft metal fitting and an outer cylinder metal fitting are connected to each other with a rubber elastic body, and the outer cylinder metal fitting is connected to the inner hole of the main body side thick member. The rubber elastic body of the vibration isolator main body may be directly fixed to the inner peripheral surface of the inner hole of the main body side thick member by bonding or the like.

  According to a seventh aspect of the present invention, in the vibration isolator bracket according to any one of the first to sixth aspects, the main body side thick member is a molded product, while the fixing leg is The member is a press-molded product.

  According to the bracket for an anti-vibration device structured according to this aspect, the main body side thick member having a large thickness dimension utilizes the easy molding characteristics of light metal or synthetic resin, and has excellent mass productivity and material It becomes feasible with a yield of. Further, the fixing leg member can be integrally provided with reinforcing ribs as appropriate by utilizing the press working characteristics due to the relatively thin wall and the excellent ductility of the ferrous metal, for example, the fixing leg. A shape in which the member largely protrudes outward from the main body side thick member can be easily realized. Note that the mold forming includes die-cast mold forming, extrusion mold forming, and the like. For example, an extrusion-molded product can be cut to an appropriate length to form a body-side thick member.

  The eighth aspect of the present invention is characterized in that the vibration isolator body is assembled to the vibration isolator bracket according to any one of claims 1 to 7.

  The structure of the vibration isolator main body employed in the present embodiment is not limited in any way, and is a fluid that is disposed between the vibration members constituting the vibration transmission system and reduces input vibration due to internal friction of the rubber elastic body. An encapsulated or non-fluid encapsulated anti-vibration mount or anti-vibration coupling device may be used, and a mass member is elastically supported by a rubber elastic body with respect to a vibration member to be controlled to constitute a mass spring system A vibration control device that suppresses vibration of the vibration control target may be used.

  According to the vibration isolator bracket having the structure according to the present invention and the vibration isolator using the same, the bracket is made of a metal-side thick member formed of a light metal or a synthetic resin and an iron metal. Since it is made into the composite structure which consists of a leg member, weight reduction and cost reduction can be achieved, ensuring the intensity | strength characteristic and vibration proof performance which are requested | required.

The perspective view which shows the vibration isolator as one Embodiment of this invention in the mounting state to a vehicle. The front view of the vibration isolator shown by FIG. The top view of the vibration isolator shown by FIG. IV-IV sectional drawing in FIG. VV sectional drawing in FIG. The perspective view which shows the block member which comprises the bracket for vibration isolator of the vibration isolator shown by FIG. 1 in the state holding the vibration isolator main body. The perspective view which shows the fixing leg member which comprises the bracket for vibration isolator of the vibration isolator shown by FIG.

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

  First, FIGS. 1 to 5 show an automobile engine mount 10 as an embodiment of a vibration isolator according to the present invention. The engine mount 10 includes a mount body 14 as a vibration isolator body including a rubber elastic body 12 and a vibration isolator bracket 16 according to the present invention. And the engine mount 10 of this embodiment is mounted | worn between the power unit 18 as one vibration member which comprises a vibration transmission system, and the vehicle body 20 as the other member which comprises a vibration transmission system, The power unit 18 is elastically supported with respect to the vehicle body 20. In the following description, the vertical direction refers to the vertical direction in FIG. 2, and the width direction refers to the horizontal direction in FIG. The axial direction refers to the vertical direction in FIG.

  More specifically, the mount body 14 of this embodiment has a structure in which the attachment member 22 is fixed to the rubber elastic body 12. The mounting member 22 includes a circular fixing bolt hole 24 penetrating in the axial direction, and has a cylindrical shape extending straight in the axial direction with a constant cross section. The peripheral wall of the mounting member 22 has a semi-cylindrical shape at the lower half, a flat contact surface at the upper end of the upper half, and an outer peripheral shape with a small cross-section. .

  On the other hand, the rubber elastic body 12 protrudes downward from the outer peripheral surface of the mounting member 22 and is fixed to the outer peripheral surface of the mounting member 22 so as to cover substantially the entire length except for both axial ends. . Further, the rubber elastic body 12 is formed with a straight hole 26 that is located in the central portion in the circumferential direction around the attachment member 22 and penetrates in the axial direction. Thereby, the rubber elastic body 12 is substantially divided into two in the circumferential direction, and a pair of arms projecting obliquely downward from the mounting member 22 so as to be separated from each other in the width direction from the top to the bottom. Portions 28 and 28 are configured.

  Further, a buffer rubber 30 having a predetermined thickness is formed integrally with the rubber elastic body 12 on the upper surface of the mounting member 22 that is a flat contact surface. When the power unit 18 is moved in the rebound direction (the direction from the bottom to the top), the mounting member 22 strikes the block member 34 (described later) via the buffer rubber 30 so that the power unit 18 A rebound stopper mechanism that limits the amount of displacement in a buffer manner is configured. The main rubber elastic body 12 integrally formed with the buffer rubber 30 has a through hole 31 through which the mounting member 22 is inserted at the upper end where the pair of arm portions 28 and 28 are integrally connected. The attachment member 22 is bonded to the inner peripheral surface of the through hole 31, and the main rubber elastic body 12 covers the outer peripheral surface of the attachment member 22 over substantially the entire surface.

  Furthermore, a stopper portion 32 is formed integrally with the rubber elastic body 12 at the approximate center of the bottom wall portion of the straight hole 26. The stopper 32 is a plate-like protrusion that protrudes upward toward the mounting member 22, and is a block that will be described later when an input is generated in accordance with the displacement of the power unit 18 in the bound direction (direction from top to bottom). A bounding stopper mechanism that limits the amount of displacement of the power unit 18 in a buffering manner is configured by the mounting member 22 striking the member 34 via the stopper portion 32.

  On the other hand, the vibration isolator bracket 16 includes a block member 34 as a main body side thick member to which the mount main body 14 is directly fixed, and a fixing leg member 36 fixed to the vehicle body 20. ing.

  As shown in FIG. 6, the block member 34 has a substantially cylindrical shape including a thick peripheral wall extending as a whole with a predetermined dimension (thickness dimension) D in the axial direction. In particular, in the present embodiment, the peripheral wall portions on both the upper and lower sides are the upper side portion and the lower side portion extending in the width direction that is the left-right direction in FIG. 5, and the width direction length of the upper side portion is smaller than the lower side portion. By making it small, the overall shape is a substantially trapezoidal cylinder.

  That is, the block member 34 of the present embodiment has the peripheral wall portion 40 of the inner hole 38 penetrating in the axial direction. The lower side portion of the peripheral wall portion 40 has a radial thickness dimension larger than that of the upper side portion, thereby constituting an assembly portion 42 that is assembled to the fixing leg member 36.

  Further, at both end portions in the width direction of the assembling portion 42, corner portions of the peripheral wall where both side portions rise upward from the assembling portion 42 are provided. Then, one corner portion located on the right side in FIG. 5 has a larger wall thickness than the other corner portion, thereby forming an extension portion 44. In the extended portion 44, a fastening bolt hole 46 penetrating in the axial direction is formed.

  In particular, in this embodiment, the fastening bolt hole 46 penetrates the block member 34 in the axial direction, is parallel to the fixing bolt hole 24 of the mounting member 22 described above, and both the bolt holes 46, 24. The cross-sectional areas of are also substantially the same.

  Further, in the peripheral wall portion 40 of the block member 34, thick side portions 47, 47 projecting toward the inner peripheral side are formed on both side portions connecting the upper side portion and the lower side portion. These thick portions 47 and 47 are located slightly above the center of both side portions, and are opposed to the mounting member 22 with a predetermined distance in the width direction which is the left-right direction in FIG. ing. When the load in the width direction is input from the power unit 18, the mounting member 22 strikes the thick portions 47, 47 of the block member 34 through the rubber layer covering the outer peripheral surface, whereby the power unit 18 is displaced. A width direction stopper mechanism for limiting the amount in a buffering manner is configured.

  Such a block member 34 is arranged so as to surround the mount main body 14 from the outer periphery, and the lower end of the mount main body 14 is the outer periphery of the lower end surface of the arm portions 28 and 28 and the bottom wall portion of the straight hole 26. In the surface, the block member 34 is fixed to the assembled portion 42 and the inner peripheral surface of both corner portions. Thus, the mount body 14 is disposed and held in the inner hole 38 of the block member 34 in a state where the fixing bolt hole 24 of the mounting member 22 of the mount body 14 and the inner hole 38 of the block member 34 are parallel to each other. ing. In other words, the attachment member 22 is connected to the block member 34 via the rubber elastic body 12. Therefore, in the present embodiment, the main body holding portion that holds the mount main body 14 in the block member 34 is configured by the peripheral wall portion 40 of the inner hole 38 of the block member 34.

  In the inner hole 38 of the block member 34, there is provided a space that extends from above the mount body 14 to both sides in the width direction and penetrates in the axial direction. This space is a rake hole 48 that allows relative displacement in the direction perpendicular to the axis of the mounting member 22 within the inner hole 38 of the block member 34 and adjusts the spring characteristics of the mount body 14.

  Here, the block member 34 is made of light metal or synthetic resin. As the light metal, an aluminum alloy or the like is preferably used. As the synthetic resin, a fiber reinforced resin containing glass fiber or carbon fiber can also be used.

  The material of the attachment member 22 is not particularly limited, but a light metal such as an aluminum alloy or a synthetic resin is preferably employed as in the case of the block member 34.

  Furthermore, the block member 34 of the present embodiment is a die-cast product, and is filled with a molten material into a mold having a molding cavity of a desired shape, and after cooling, the mold is divided and taken out. The molded one is used. Note that post-processing such as deburring and chamfering can be appropriately performed on the die-cast molded product. Further, it is possible to perform die-casting including the fastening bolt hole 46, but a partial structure such as the fastening bolt hole 46 can be formed by post-processing.

  Further, the block member 34 can be fixed to the rubber elastic body 12 of the mount body 14 by an appropriate method. For example, the mount body 14 in which the rubber elastic body 12 is molded in advance is set in the molding cavity of the block member 34 so that the rubber elastic body 12 is adhered to the block member 34 simultaneously with the die casting of the block member 34. good. Alternatively, the rubber elastic body 12 is vulcanized and molded at the same time as filling the rubber material into the molding cavity in which the block member 34 and the mounting member 22 are set in advance, and the rubber elastic body 12 with respect to the block member 34 and the mounting member 22. Can also be bonded. Alternatively, the block member 34 and the rubber elastic body 12 may be bonded separately after being separately molded.

  On the other hand, as shown in FIG. 7, the fixing leg member 36 has a groove shape extending linearly with a U-shaped cross section opening upward as a whole. That is, the side wall parts 52 and 52 as a pair of fitting walls are rising substantially perpendicularly from both sides in the width direction (vertical direction in FIG. 3) of the bottom wall part 50 having a long flat plate shape. And a pair of side wall parts 52 and 52 have the opposing inner surface of the 2 face | width which faced mutually parallel at a predetermined distance mutually.

  Between these side wall parts 52 and 52, the fitting part 54 which has the groove-shaped dent for the block member 34 being inserted and assembled | attached so that it may mention later is comprised. In the present embodiment, the distance E between the opposing surfaces of the side walls 52, 52 (see FIG. 7) in the single product state before the block member 34 is assembled is slightly smaller than the thickness D of the block member 34. Yes.

  Further, bolt insertion holes 56, 56 are formed through the bottom wall portion 50 at both side portions in the groove length direction of the fixing leg member 36 having a concave groove shape as a whole. Further, bolt holes 58, 58 are formed in the side walls 52, 52 at positions facing each other in the groove width direction.

  The positions of these bolt holes 58, 58 are biased from the center of the side walls 52, 52 to one end side in the groove length direction, and the bolts for fastening the block member 34 assembled to the fitting portion 54. A position corresponding to the hole 46 is set. Moreover, the height dimension of each side wall part 52 and 52 is enlarged in the formation part of the bolt hole 58 and 58, and the area | region for bolt hole formation is ensured.

  Here, the fixing leg member 36 is formed of an iron-based metal. In the present embodiment, the base plate is formed by punching bolt holes 58 and 58 in a base plate obtained by punching out an iron plate having a predetermined thickness and raising the side wall portions 52 and 52 by pressing. In addition, the plate thickness dimension F (refer FIG. 4) of this iron plate is sufficiently smaller than the plate thickness dimension E of the block member 34, for example, 8 mm or less, or 5 mm or less, and press work is made easy.

  The assembly portion 42 of the block member 34 as described above is fitted between the opposing surfaces of the side wall portions 52, 52 in the fitting portion 54 of the fixing leg member 36, and the block member 34 and the fixing leg member 36 are connected to each other. The anti-vibration device bracket 16 of the present embodiment is configured by being fastened to each other by the fastening portion 61. That is, the fastening bolt hole 46 of the block portion 34 and the bolt holes 58 and 58 of the fixing leg member 36 are aligned so as to be continuous on the same central axis, and the fastening bolt 62 is inserted therethrough. It is tightened with a nut 60. Therefore, in this embodiment, the fastening portion 61 that fastens the block member 34 and the fixing leg member 36 to each other is used for fastening the bolt member 46, 58, 58 in the block member 34 and the side wall portions 52, 52. A bolt 62 and a nut 60 are used.

  In the engine mount 10 of this embodiment, the fixing bolt 64 is inserted into the fixing bolt hole 24 in the mounting member 22 so that the mounting member 22 (mount main body 14) is fixed to the power unit 18, and the fixing legs are fixed. The mount body 14 is fixed to the vehicle body 20 via the vibration isolator bracket 16 by inserting the bolts 66 and 66 into the bolt insertion holes 56 and 56 of the member 36. As a result, the power unit 18 is elastically supported by the vehicle body 20 via the engine mount 10. In this embodiment, the fixing bolt 64 for fixing the engine mount 10 to the power unit 18 and the fastening bolt 62 for fastening the block portion 34 and the fixing leg portion 36 are the same standard (material). , Size, etc.), and the same number (one) of bolts extends in the same direction (mount axis direction).

  Here, in the present embodiment, the distance E between the opposing surfaces in the side wall portions 52 and 52 of the fixing leg member 36 before the block member 34 is fitted is slightly smaller than the thickness D of the block member 34. Since it is made small, the assembly portion 42 of the block member 34 is fitted into the fitting portion 54 of the fixing leg member 36 in a press-fitted state. Therefore, the side wall portions 52 and 52 constituting the fitting portion 54 are overlapped with the assembly portion 42 of the block member 34 in a contact state.

  The vibration isolator bracket 16 of the present embodiment having the above-described structure is a composite structure in which a block member 34 made of a light metal such as an aluminum alloy or a synthetic resin and a fixing leg member 36 made of an iron-based metal are combined. Thus, for example, compared to the case where the entire bracket is formed of an aluminum alloy or the like, the manufacture is easy and the cost can be reduced. Further, the weight can be reduced as compared with the case where the entire bracket is formed of iron or the like. Further, since the block member 34 is formed of an aluminum alloy or the like, the weight can be reduced, and the thickness can be increased by the amount that is reduced, so that the rigidity can be improved. Therefore, the weight can be reduced and the cost can be reduced while achieving high rigidity, and the vibration isolator bracket 16 having excellent practicality can be realized.

  Further, in the vibration isolator bracket 16 of the present embodiment, the fixing leg member 36 includes the concave fitting portion 54, and the assembly portion 42 of the block member 34 is press-fitted into the fitting portion 54, Further, the fastening bolt 62 is inserted into the press-fitted portion, and the block member 34 and the fixing leg member 36 are bolted. Therefore, the block member 34 and the fixing leg member 36 are bonded with sufficient bonding strength even at the bonding portion between members made of different materials that tend to be weak.

  In particular, since the fitting portion 54 of the present embodiment includes a pair of side wall portions 52 and 52 having a two-sided width, the side wall portions 52 and 52 extend over substantially the entire side surfaces of the assembly portion 42. The fitting state of the assembling portion 42 to the fitting portion 54 can be fixed and stably maintained, and the joint strength between the block member 34 and the fixing leg member 36 can be improved. . In addition, the abutting surface (sandwich surface) of the pair of side wall portions 52, 52 having a two-surface width to the assembly portion 42 is a planar shape orthogonal to the central axis of the fastening bolt 62. Since the fastening force of the fastening bolt 62 is exerted in the contact direction of the side wall portions 52 and 52 with the assembly portion 42, the fitting force of the side wall portions 52 and 52 to the assembly portion 42 is increased. It can be exhibited more stably.

  Further, the accuracy of positioning of the block member 34 and the fixing leg member 36 can be further improved by press-fitting the assembly portion 42 into the fitting portion 54. Further, it is possible to firmly secure the bonding strength between the block member 34 and the fixing leg member 36 even with bolt fixing with a single bolt (fastening bolt 62), and the assembly work of both members is also easy. Become.

  In the present embodiment, the fixing bolt 64 and the fastening bolt 62 have the same size and the same number (one), and these extend in parallel in the same direction (axial direction). Therefore, the loads applied from the power unit 18 to the respective bolts 62 and 64 are substantially equal, and the strength setting in the design is facilitated. The fixing bolts and fastening bolts have the same size and the same number, and it is preferable that they extend in the same direction. However, the number of these bolts is limited to one. However, when the number of fixing bolts is two, it is preferable that the number of fastening bolts is also two.

  Further, in the present embodiment, the block member 34 having a relatively large rigidity is formed into a substantially cylindrical shape, and the mount body 14 is accommodated in the inner hole 38. Therefore, the rigidity of the block member 34 itself is advantageous in terms of shape. It can be ensured and a stopper function in the direction perpendicular to each axis can be easily realized. In particular, the cylindrical block member 34 in which the radial wall thickness of the peripheral wall portion differs in the circumferential position as in the present embodiment can be easily manufactured by die casting.

  On the other hand, in the present embodiment, since the fixing leg member 36 having a concave shape having a two-sided width has a substantially constant thickness throughout, it is easier to manufacture by pressing a steel plate or the like. It is said that. However, it is also possible to make the wall thickness of the bottom wall portion and the side wall portion different from each other, or to reinforce the fillet at the rising portion of the side wall portion from the bottom wall portion.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the specific descriptions in the embodiments, and various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art. It is feasible in the form which added.

  For example, in the said embodiment, although the assembly | attachment part 42 was inserted by the press-fit state with respect to the fitting part 54, it is not limited to this aspect. That is, the distance E between the opposing surfaces of the side walls of the fixing leg member may be slightly larger than the thickness dimension D of the block member. The assembling part may be fitted into the fitting part with a slight gap. In such a case, for example, it is bolted with fastening bolts at two locations on both sides in the width direction of the assembling part. You may do it. Moreover, in the part pinched | interposed by the side wall part which comprises a fitting part, one or more fitting protrusions which protrude toward the side wall part from the surface of an assembly part are formed, and the protrusion front-end | tip of those fitting protrusion parts It is also possible to adjust the contact state between the assembly part and the fitting part by superimposing only the surface in contact with the side wall part.

  The fitting portion is not limited to the groove shape as in the above embodiment, and may be, for example, an annular peripheral wall structure that surrounds the entire periphery of the assembling portion. You may provide the surrounding wall contact | abutted also to another surface in addition to the surface. Further, the fixing leg member does not necessarily have a bottom wall portion, for example, a cylindrical peripheral wall portion that is superimposed on the outer peripheral surface of the assembly portion, and extends outward from the outer peripheral surface of the peripheral wall portion. A structure including a plurality of leg portions can also be employed.

  Moreover, in the said embodiment, although the assembly | attachment part 42 was press-fitted and fixed with respect to the fitting part 54, in the state which positioned the assembly part of the block member in the predetermined fastening position with respect to the fixing leg member, for example It is also possible to form a fitting part that presses the fixing leg member to raise the side wall part and sandwich the assembly part. Thereby, the assembly | attachment part can be distribute | arranged to the position inserted in the fitting part simultaneously with formation of the fitting part.

  Note that the fastening means between the block member and the fixing leg member is not limited to the bolt fixing as in the above-described embodiment, but is a rivet, caulking fixing, locking fixing by a locking piece raised by cutting and raising, etc. Conventionally known fastening means may be employed. Further, the arrangement position and number of bolts, rivets and the like constituting the fastening means can be arbitrarily set without being limited to the above embodiment.

  Further, the specific structure of the mount body 14 is not limited, and various types including a fluid-filled vibration isolator and an active vibration isolator that actively switches characteristics according to the required vibration isolating characteristics. A structural mount body may be employed. Note that the structure for holding the mount body to the block member is not limited to the fixing structure of the rubber elastic body 12, and for example, the outer cylindrical member spaced apart on the outer peripheral side of the inner shaft member is connected by the rubber elastic body. In the case of the known cylindrical mount, the outer cylindrical member can be press-fitted and held in the inner hole of the block member.

  Furthermore, the block member is not limited to the cylindrical shape as in the above-described embodiment. For example, when it is not necessary to configure a rebound stopper mechanism or a lateral stopper mechanism, the lower half circumference including the assembly portion 42 is included. A block member made up of portions can also be employed.

  Furthermore, in the said embodiment, although the engine mount 10 for motor vehicles was shown as a vibration isolator which concerns on this invention, it is not limited to this aspect. That is, the present invention can be applied to various anti-vibration devices other than those for automobiles, in addition to various anti-vibration devices such as sub-frame mounts for automobiles. Further, the vibration control device may be for a vehicle or a vehicle other than the vehicle. For example, the present invention can be applied to a dynamic damper in which a vibration member to be controlled is a vehicle body of an automobile.

10: engine mount (vibration isolation device), 12: rubber elastic body, 14: mount body (vibration isolation device main body), 16: bracket for vibration isolation device, 18: power unit (vibration member, one of which constitutes vibration transmission system) Members), 20: vehicle body (the other member constituting the vibration transmission system), 22: mounting member, 34: block member (main body side thick member), 36: fixing leg member, 40: peripheral wall (main body holding) Part), 42: assembly part, 46: fastening bolt hole, 52: side wall part (fitting wall), 54: fitting part, 58: bolt hole, 61: fastening part, 62: fastening bolt, 64: Fixing bolt

  The present invention relates to a vibration isolator bracket for attaching a vibration isolator main body such as an engine mount to a vibration member, and a vibration isolator using the same.

  2. Description of the Related Art Conventionally, as an anti-vibration device such as various mounts and dampers used in automobiles, an anti-vibration device body including a rubber elastic body is known. Further, in such a vibration isolator, a bracket is used when attaching to a vibration member constituting a vibration system.

  A general structure of a vibration isolator bracket is disclosed in Japanese Unexamined Patent Application Publication No. 2002-181101 (Patent Document 1) and Japanese Unexamined Patent Application Publication No. 2010-184626 (Patent Document 2). These conventional anti-vibration device brackets are generally metal brackets manufactured by processing an iron-based metal plate by press molding and welding.

  By the way, along with the advancement of required performance of automobiles and the like, in recent years, there has been a demand for further increase in rigidity and weight of the vibration isolator bracket.

  However, with a metal bracket that has been processed from an iron-based metal fitting with a conventional structure, increasing the thickness and improving the rigidity increases the weight, making it difficult to achieve both the required high rigidity and light weight. .

  On the other hand, Japanese Patent Application Laid-Open No. 2010-111204 (Patent Document 3) proposes a bracket for an anti-vibration device having an integral structure made of die-cast aluminum alloy. In such brackets, it has been studied to achieve high rigidity while suppressing an increase in weight by adopting an aluminum alloy having a specific gravity smaller than that of iron.

  However, in die casting of aluminum alloy or the like, as described in Patent Document 3 above, if an attempt is made to manufacture a vibration isolator bracket having a complicated shape as a whole including the fixing portion, a mold is manufactured. Therefore, it is difficult to avoid an increase in time and cost required for manufacturing.

  In addition, there is also a bracket shape in which the fixing part attached to the vibration member greatly extends outward from the attachment part of the vibration isolator main body, so that the die casting mold is enlarged and the manufacturing equipment is enlarged and further Costs are likely to increase, and it may be difficult to ensure molding accuracy. Therefore, there is a problem that the aluminum die-cast bracket is difficult to put into practical use.

JP 2002-181101 A JP 2010-184626 A JP 2010-111204 A

  Here, the present invention has been made against the background as described above, and the problem to be solved is that both high rigidity and light weight can be achieved, and practical application can be easily achieved. The object is to provide a vibration isolator bracket having a novel structure and a vibration isolator using the same.

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

According to a first aspect of the present invention, there is provided a vibration isolator bracket for attaching a vibration isolator main body configured to include a rubber elastic body to a vibration member. (I) A main body holding on which the vibration isolator main body is held And a body-side thick member made of light metal or synthetic resin, and (ii) a fitting leg having a groove-like recess and made of iron-based metal. And (iii) an assembly portion that is fitted into the fitting portion of the fixing leg member is provided in the main body-side thick member, and the fitting portion The fixing leg member is thinner than the thickness dimension of the assembly portion in the groove width direction of the groove-shaped recess, and further, the fitting portion is inserted into the fitting portion in the insertion state. Braking for vibration isolator provided with a fastening portion for fastening the main body side thick member and the fixing leg member to each other The door and is characterized.

  According to this aspect, the vibration isolator bracket is configured with a composite structure of the main body side thick member made of light metal or synthetic resin and the fixing leg member made of iron-based metal. And, with the fixing leg member, the load-bearing performance required for the fixing part to the vibrating member can be secured by utilizing the large strength characteristics of iron-based metal and easy workability by pressing, etc. It is possible to cope with a complicated shape including a mounting portion and a large size. On the other hand, the body-side thick member that reduces the local concentrated load when a load is input through the rubber elastic body can be reduced in weight by light metal or rigid resin, and is thicker than iron-based metal. Since securing the thickness dimension and increasing the degree of freedom in setting the shape, the required strength and rigidity are ensured by the member thickness, and it becomes easy to handle various shapes necessary for the holding part of the vibration isolator body. .

  In addition, a specific joining structure in which the fitting structure and the fastening structure are combined is adopted at the joining portion between the main body side thick member made of a different material and the fixing leg member. As a result, local stress concentration in the joint was dispersed by the fitting structure to ensure the overall joint strength, while ensuring a reliable joint state with the fastening structure, and also achieved joint reliability. .

  Therefore, in the vibration isolator bracket having the structure according to this aspect, the basic structure of strength and rigidity required for attaching the vibration isolator main body to the vibration member by adopting the composite structure in which the specific part is made non-ferrous. The overall weight reduction is achieved while sufficiently securing the performance, and the cost can be reduced as compared with the case where the whole is manufactured by integral molding of a synthetic resin material or the like.

  According to a second aspect of the present invention, there is provided the vibration isolator bracket according to the first aspect, wherein the fitting portion opens to the main body holding portion side with a two-sided width and the assembly portion is fitted. It is a shape.

  According to the vibration isolator bracket having a structure according to the present aspect, positioning is performed so that the assembly portion is sandwiched from both sides by the concave side wall portions of the attachment portion. The inserted state can be maintained more stably.

  A third aspect of the present invention is the vibration isolator bracket according to the second aspect, wherein the fitting portion includes a pair of fitting walls opposed to each other with a two-sided width. The assembly portion is fitted between opposing surfaces of the attachment wall, and the opposing surfaces of the pair of attachment walls are overlapped with the assembly portion in a contact state.

  According to the vibration isolator bracket having the structure according to this aspect, since the fitting wall is overlapped on both sides of the assembling portion in a contact state, the assembling portion is fitted to the fitting portion with a gap. Compared to the inserted state, the main body side thick member and the fixing leg member can be more accurately and reliably connected.

  In this aspect, the pair of fitting walls are formed by pressing or the like so as to form a concave fitting portion in the fixing leg member in advance, and are assembled between the opposing surfaces of the pair of fitting walls. With the press-fit structure for fitting the attachment part, the assembly part can be fitted into the attachment part. Alternatively, the mounting portion is configured by forming a pair of mounting walls so as to be sandwiched from both sides of the mounting portion by pressing or the like in a state where the mounting portion is previously arranged at a predetermined position with respect to the fixing leg member. By doing this, the assembly part may be brought into the fitted state almost simultaneously with the completion of the fitting part.

  According to a fourth aspect of the present invention, in the vibration isolator bracket according to any one of the first to third aspects, the fastening for fastening the main body side thick member and the fixing leg member to each other A fastening bolt hole provided between the assembly portion of the main body side thick member and the fitting portion of the fixing leg member, and a fastening bolt inserted through the fastening bolt hole Are included.

  According to the vibration isolator bracket having the structure according to this aspect, the fitting structure between the assembled portion and the fitting portion is directly maintained by the bolt in the assembled portion of the main body side thick member and the fixing leg member. As a result, both members can be fastened securely and easily. In particular, by combining with the third aspect, it becomes possible to exert a tightening force of the fastening bolts in a direction in which the pair of fitting walls are sandwiched with respect to the assembling part, and the fitting structure and the fastening structure are used. A synergistic improvement in fixing strength can be achieved. The number of fastening bolts is not limited.

  According to a fifth aspect of the present invention, in the vibration isolator bracket according to the fourth aspect, the vibration isolator main body is connected to the main body side thick member via the rubber elastic body. The mounting member is fixed to one member constituting the vibration transmission system, and is fixed to the other member constituting the vibration transmission system at the fixing leg member. The fixing bolt for fixing the mounting member to the one member constituting the vibration transmission system is arranged in parallel with the fastening bolt.

  According to the vibration isolator bracket having the structure according to this aspect, the fixing bolt and the fastening bolt are disposed in the same direction, so that not only the workability when mounting each bolt is improved. This makes it easy to design and check the strength characteristics of both bolts. For example, it is more preferable to provide the same number of fixing bolts and fastening bolts of the same size, thereby improving the load resistance performance against external force exerted on the vibration isolator bracket between members constituting the vibration transmission system. In consideration, it becomes easy to optimally set both the fixing bolt and the fastening bolt.

According to a sixth aspect of the present invention, in the vibration isolator bracket according to any one of the first to fifth aspects, the main body-side thick member has a cylindrical shape, and the main body-side thick member The vibration isolator body is disposed in the inner hole.

  In the vibration isolator bracket structured according to this aspect, the main body side thick member is disposed so as to surround the outer periphery of the rubber elastic body, and the deformation amount of the rubber elastic body is applied to the main body side thick member. It is possible to limit by contact, and the strength can be more effectively ensured by making the main body side thick member cylindrical. In this aspect, the vibration isolator main body is, for example, a cylindrical mount in which an inner shaft metal fitting and an outer cylinder metal fitting are connected to each other with a rubber elastic body, and the outer cylinder metal fitting is connected to the inner hole of the main body side thick member. The rubber elastic body of the vibration isolator main body may be directly fixed to the inner peripheral surface of the inner hole of the main body side thick member by bonding or the like.

  According to a seventh aspect of the present invention, in the vibration isolator bracket according to any one of the first to sixth aspects, the main body side thick member is a molded product, while the fixing leg is The member is a press-molded product.

  According to the bracket for an anti-vibration device structured according to this aspect, the main body side thick member having a large thickness dimension utilizes the easy molding characteristics of light metal or synthetic resin, and has excellent mass productivity and material It becomes feasible with a yield of. Further, the fixing leg member can be integrally provided with reinforcing ribs as appropriate by utilizing the press working characteristics due to the relatively thin wall and the excellent ductility of the ferrous metal, for example, the fixing leg. A shape in which the member largely protrudes outward from the main body side thick member can be easily realized. Note that the mold forming includes die-cast mold forming, extrusion mold forming, and the like. For example, an extrusion-molded product can be cut to an appropriate length to form a body-side thick member.

  The eighth aspect of the present invention is characterized in that the vibration isolator body is assembled to the vibration isolator bracket according to any one of claims 1 to 7.

  The structure of the vibration isolator main body employed in the present embodiment is not limited in any way, and is a fluid that is disposed between the vibration members constituting the vibration transmission system and reduces input vibration due to internal friction of the rubber elastic body. An encapsulated or non-fluid encapsulated anti-vibration mount or anti-vibration coupling device may be used, and a mass member is elastically supported by a rubber elastic body with respect to a vibration member to be controlled to constitute a mass spring system A vibration control device that suppresses vibration of the vibration control target may be used.

  According to the vibration isolator bracket having the structure according to the present invention and the vibration isolator using the same, the bracket is made of a metal-side thick member formed of a light metal or a synthetic resin and an iron metal. Since it is made into the composite structure which consists of a leg member, weight reduction and cost reduction can be achieved, ensuring the intensity | strength characteristic and vibration proof performance which are requested | required.

The perspective view which shows the vibration isolator as one Embodiment of this invention in the mounting state to a vehicle. The front view of the vibration isolator shown by FIG. The top view of the vibration isolator shown by FIG. IV-IV sectional drawing in FIG. VV sectional drawing in FIG. The perspective view which shows the block member which comprises the bracket for vibration isolator of the vibration isolator shown by FIG. 1 in the state holding the vibration isolator main body. The perspective view which shows the fixing leg member which comprises the bracket for vibration isolator of the vibration isolator shown by FIG.

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

  First, FIGS. 1 to 5 show an automobile engine mount 10 as an embodiment of a vibration isolator according to the present invention. The engine mount 10 includes a mount body 14 as a vibration isolator body including a rubber elastic body 12 and a vibration isolator bracket 16 according to the present invention. And the engine mount 10 of this embodiment is mounted | worn between the power unit 18 as one vibration member which comprises a vibration transmission system, and the vehicle body 20 as the other member which comprises a vibration transmission system, The power unit 18 is elastically supported with respect to the vehicle body 20. In the following description, the vertical direction refers to the vertical direction in FIG. 2, and the width direction refers to the horizontal direction in FIG. The axial direction refers to the vertical direction in FIG.

  More specifically, the mount body 14 of this embodiment has a structure in which the attachment member 22 is fixed to the rubber elastic body 12. The mounting member 22 includes a circular fixing bolt hole 24 penetrating in the axial direction, and has a cylindrical shape extending straight in the axial direction with a constant cross section. The peripheral wall of the mounting member 22 has a semi-cylindrical shape at the lower half, a flat contact surface at the upper end of the upper half, and an outer peripheral shape with a small cross-section. .

  On the other hand, the rubber elastic body 12 protrudes downward from the outer peripheral surface of the mounting member 22 and is fixed to the outer peripheral surface of the mounting member 22 so as to cover substantially the entire length except for both axial ends. . Further, the rubber elastic body 12 is formed with a straight hole 26 that is located in the central portion in the circumferential direction around the attachment member 22 and penetrates in the axial direction. Thereby, the rubber elastic body 12 is substantially divided into two in the circumferential direction, and a pair of arms projecting obliquely downward from the mounting member 22 so as to be separated from each other in the width direction from the top to the bottom. Portions 28 and 28 are configured.

  Further, a buffer rubber 30 having a predetermined thickness is formed integrally with the rubber elastic body 12 on the upper surface of the mounting member 22 that is a flat contact surface. When the power unit 18 is moved in the rebound direction (the direction from the bottom to the top), the mounting member 22 strikes the block member 34 (described later) via the buffer rubber 30 so that the power unit 18 A rebound stopper mechanism that limits the amount of displacement in a buffer manner is configured. The main rubber elastic body 12 integrally formed with the buffer rubber 30 has a through hole 31 through which the mounting member 22 is inserted at the upper end where the pair of arm portions 28 and 28 are integrally connected. The attachment member 22 is bonded to the inner peripheral surface of the through hole 31, and the main rubber elastic body 12 covers the outer peripheral surface of the attachment member 22 over substantially the entire surface.

  Furthermore, a stopper portion 32 is formed integrally with the rubber elastic body 12 at the approximate center of the bottom wall portion of the straight hole 26. The stopper 32 is a plate-like protrusion that protrudes upward toward the mounting member 22, and is a block that will be described later when an input is generated in accordance with the displacement of the power unit 18 in the bound direction (direction from top to bottom). A bounding stopper mechanism that limits the amount of displacement of the power unit 18 in a buffering manner is configured by the mounting member 22 striking the member 34 via the stopper portion 32.

  On the other hand, the vibration isolator bracket 16 includes a block member 34 as a main body side thick member to which the mount main body 14 is directly fixed, and a fixing leg member 36 fixed to the vehicle body 20. ing.

  As shown in FIG. 6, the block member 34 has a substantially cylindrical shape including a thick peripheral wall extending as a whole with a predetermined dimension (thickness dimension) D in the axial direction. In particular, in the present embodiment, the peripheral wall portions on both the upper and lower sides are the upper side portion and the lower side portion extending in the width direction that is the left-right direction in FIG. 5, and the width direction length of the upper side portion is smaller than the lower side portion. By making it small, the overall shape is a substantially trapezoidal cylinder.

  That is, the block member 34 of the present embodiment has the peripheral wall portion 40 of the inner hole 38 penetrating in the axial direction. The lower side portion of the peripheral wall portion 40 has a radial thickness dimension larger than that of the upper side portion, thereby constituting an assembly portion 42 that is assembled to the fixing leg member 36.

  Further, at both end portions in the width direction of the assembling portion 42, corner portions of the peripheral wall where both side portions rise upward from the assembling portion 42 are provided. Then, one corner portion located on the right side in FIG. 5 has a larger wall thickness than the other corner portion, thereby forming an extension portion 44. In the extended portion 44, a fastening bolt hole 46 penetrating in the axial direction is formed.

  In particular, in this embodiment, the fastening bolt hole 46 penetrates the block member 34 in the axial direction, is parallel to the fixing bolt hole 24 of the mounting member 22 described above, and both the bolt holes 46, 24. The cross-sectional areas of are also substantially the same.

  Further, in the peripheral wall portion 40 of the block member 34, thick side portions 47, 47 projecting toward the inner peripheral side are formed on both side portions connecting the upper side portion and the lower side portion. These thick portions 47 and 47 are located slightly above the center of both side portions, and are opposed to the mounting member 22 with a predetermined distance in the width direction which is the left-right direction in FIG. ing. When the load in the width direction is input from the power unit 18, the mounting member 22 strikes the thick portions 47, 47 of the block member 34 through the rubber layer covering the outer peripheral surface, whereby the power unit 18 is displaced. A width direction stopper mechanism for limiting the amount in a buffering manner is configured.

  Such a block member 34 is arranged so as to surround the mount main body 14 from the outer periphery, and the lower end of the mount main body 14 is the outer periphery of the lower end surface of the arm portions 28 and 28 and the bottom wall portion of the straight hole 26. In the surface, the block member 34 is fixed to the assembled portion 42 and the inner peripheral surface of both corner portions. Thus, the mount body 14 is disposed and held in the inner hole 38 of the block member 34 in a state where the fixing bolt hole 24 of the mounting member 22 of the mount body 14 and the inner hole 38 of the block member 34 are parallel to each other. ing. In other words, the attachment member 22 is connected to the block member 34 via the rubber elastic body 12. Therefore, in the present embodiment, the main body holding portion that holds the mount main body 14 in the block member 34 is configured by the peripheral wall portion 40 of the inner hole 38 of the block member 34.

  In the inner hole 38 of the block member 34, there is provided a space that extends from above the mount body 14 to both sides in the width direction and penetrates in the axial direction. This space is a rake hole 48 that allows relative displacement in the direction perpendicular to the axis of the mounting member 22 within the inner hole 38 of the block member 34 and adjusts the spring characteristics of the mount body 14.

  Here, the block member 34 is made of light metal or synthetic resin. As the light metal, an aluminum alloy or the like is preferably used. As the synthetic resin, a fiber reinforced resin containing glass fiber or carbon fiber can also be used.

  The material of the attachment member 22 is not particularly limited, but a light metal such as an aluminum alloy or a synthetic resin is preferably employed as in the case of the block member 34.

  Furthermore, the block member 34 of the present embodiment is a die-cast product, and is filled with a molten material into a mold having a molding cavity of a desired shape, and after cooling, the mold is divided and taken out. The molded one is used. Note that post-processing such as deburring and chamfering can be appropriately performed on the die-cast molded product. Further, it is possible to perform die-casting including the fastening bolt hole 46, but a partial structure such as the fastening bolt hole 46 can be formed by post-processing.

  Further, the block member 34 can be fixed to the rubber elastic body 12 of the mount body 14 by an appropriate method. For example, the mount body 14 in which the rubber elastic body 12 is molded in advance is set in the molding cavity of the block member 34 so that the rubber elastic body 12 is adhered to the block member 34 simultaneously with the die casting of the block member 34. good. Alternatively, the rubber elastic body 12 is vulcanized and molded at the same time as filling the rubber material into the molding cavity in which the block member 34 and the mounting member 22 are set in advance, and the rubber elastic body 12 with respect to the block member 34 and the mounting member 22. Can also be bonded. Alternatively, the block member 34 and the rubber elastic body 12 may be bonded separately after being separately molded.

  On the other hand, as shown in FIG. 7, the fixing leg member 36 has a groove shape extending linearly with a U-shaped cross section opening upward as a whole. That is, the side wall parts 52 and 52 as a pair of fitting walls are rising substantially perpendicularly from both sides in the width direction (vertical direction in FIG. 3) of the bottom wall part 50 having a long flat plate shape. And a pair of side wall parts 52 and 52 have the opposing inner surface of the 2 face | width which faced mutually parallel at a predetermined distance mutually.

  Between these side wall parts 52 and 52, the fitting part 54 which has the groove-shaped dent for the block member 34 being inserted and assembled | attached so that it may mention later is comprised. In the present embodiment, the distance E between the opposing surfaces of the side walls 52, 52 (see FIG. 7) in the single product state before the block member 34 is assembled is slightly smaller than the thickness D of the block member 34. Yes.

  Further, bolt insertion holes 56, 56 are formed through the bottom wall portion 50 at both side portions in the groove length direction of the fixing leg member 36 having a concave groove shape as a whole. Further, bolt holes 58, 58 are formed in the side walls 52, 52 at positions facing each other in the groove width direction.

  The positions of these bolt holes 58, 58 are biased from the center of the side walls 52, 52 to one end side in the groove length direction, and the bolts for fastening the block member 34 assembled to the fitting portion 54. A position corresponding to the hole 46 is set. Moreover, the height dimension of each side wall part 52 and 52 is enlarged in the formation part of the bolt hole 58 and 58, and the area | region for bolt hole formation is ensured.

Here, the fixing leg member 36 is formed of an iron-based metal. In the present embodiment, the base plate is formed by punching bolt holes 58 and 58 in a base plate obtained by punching out an iron plate having a predetermined thickness and raising the side wall portions 52 and 52 by pressing. In addition, the plate thickness dimension F (refer FIG. 4) of this iron plate is sufficiently smaller than the plate thickness dimension D of the block member 34, for example, 8 mm or less or 5 mm or less, and press work is made easy.

  The assembly portion 42 of the block member 34 as described above is fitted between the opposing surfaces of the side wall portions 52, 52 in the fitting portion 54 of the fixing leg member 36, and the block member 34 and the fixing leg member 36 are connected to each other. The anti-vibration device bracket 16 of the present embodiment is configured by being fastened to each other by the fastening portion 61. That is, the fastening bolt hole 46 of the block portion 34 and the bolt holes 58 and 58 of the fixing leg member 36 are aligned so as to be continuous on the same central axis, and the fastening bolt 62 is inserted therethrough. It is tightened with a nut 60. Therefore, in this embodiment, the fastening portion 61 that fastens the block member 34 and the fixing leg member 36 to each other is used for fastening the bolt member 46, 58, 58 in the block member 34 and the side wall portions 52, 52. A bolt 62 and a nut 60 are used.

  In the engine mount 10 of this embodiment, the fixing bolt 64 is inserted into the fixing bolt hole 24 in the mounting member 22 so that the mounting member 22 (mount main body 14) is fixed to the power unit 18, and the fixing legs are fixed. The mount body 14 is fixed to the vehicle body 20 via the vibration isolator bracket 16 by inserting the bolts 66 and 66 into the bolt insertion holes 56 and 56 of the member 36. As a result, the power unit 18 is elastically supported by the vehicle body 20 via the engine mount 10. In this embodiment, the fixing bolt 64 for fixing the engine mount 10 to the power unit 18 and the fastening bolt 62 for fastening the block portion 34 and the fixing leg portion 36 are the same standard (material). , Size, etc.), and the same number (one) of bolts extends in the same direction (mount axis direction).

  Here, in the present embodiment, the distance E between the opposing surfaces in the side wall portions 52 and 52 of the fixing leg member 36 before the block member 34 is fitted is slightly smaller than the thickness D of the block member 34. Since it is made small, the assembly portion 42 of the block member 34 is fitted into the fitting portion 54 of the fixing leg member 36 in a press-fitted state. Therefore, the side wall portions 52 and 52 constituting the fitting portion 54 are overlapped with the assembly portion 42 of the block member 34 in a contact state.

  The vibration isolator bracket 16 of the present embodiment having the above-described structure is a composite structure in which a block member 34 made of a light metal such as an aluminum alloy or a synthetic resin and a fixing leg member 36 made of an iron-based metal are combined. Thus, for example, compared to the case where the entire bracket is formed of an aluminum alloy or the like, the manufacture is easy and the cost can be reduced. Further, the weight can be reduced as compared with the case where the entire bracket is formed of iron or the like. Further, since the block member 34 is formed of an aluminum alloy or the like, the weight can be reduced, and the thickness can be increased by the amount that is reduced, so that the rigidity can be improved. Therefore, the weight can be reduced and the cost can be reduced while achieving high rigidity, and the vibration isolator bracket 16 having excellent practicality can be realized.

  Further, in the vibration isolator bracket 16 of the present embodiment, the fixing leg member 36 includes the concave fitting portion 54, and the assembly portion 42 of the block member 34 is press-fitted into the fitting portion 54, Further, the fastening bolt 62 is inserted into the press-fitted portion, and the block member 34 and the fixing leg member 36 are bolted. Therefore, the block member 34 and the fixing leg member 36 are bonded with sufficient bonding strength even at the bonding portion between members made of different materials that tend to be weak.

  In particular, since the fitting portion 54 of the present embodiment includes a pair of side wall portions 52 and 52 having a two-sided width, the side wall portions 52 and 52 extend over substantially the entire side surfaces of the assembly portion 42. The fitting state of the assembling portion 42 to the fitting portion 54 can be fixed and stably maintained, and the joint strength between the block member 34 and the fixing leg member 36 can be improved. . In addition, the abutting surface (sandwich surface) of the pair of side wall portions 52, 52 having a two-surface width to the assembly portion 42 is a planar shape orthogonal to the central axis of the fastening bolt 62. Since the fastening force of the fastening bolt 62 is exerted in the contact direction of the side wall portions 52 and 52 with the assembly portion 42, the fitting force of the side wall portions 52 and 52 to the assembly portion 42 is increased. It can be exhibited more stably.

  Further, the accuracy of positioning of the block member 34 and the fixing leg member 36 can be further improved by press-fitting the assembly portion 42 into the fitting portion 54. Further, it is possible to firmly secure the bonding strength between the block member 34 and the fixing leg member 36 even with bolt fixing with a single bolt (fastening bolt 62), and the assembly work of both members is also easy. Become.

  In the present embodiment, the fixing bolt 64 and the fastening bolt 62 have the same size and the same number (one), and these extend in parallel in the same direction (axial direction). Therefore, the loads applied from the power unit 18 to the respective bolts 62 and 64 are substantially equal, and the strength setting in the design is facilitated. The fixing bolts and fastening bolts have the same size and the same number, and it is preferable that they extend in the same direction. However, the number of these bolts is limited to one. However, when the number of fixing bolts is two, it is preferable that the number of fastening bolts is also two.

  Further, in the present embodiment, the block member 34 having a relatively large rigidity is formed into a substantially cylindrical shape, and the mount body 14 is accommodated in the inner hole 38. Therefore, the rigidity of the block member 34 itself is advantageous in terms of shape. It can be ensured and a stopper function in the direction perpendicular to each axis can be easily realized. In particular, the cylindrical block member 34 in which the radial wall thickness of the peripheral wall portion differs in the circumferential position as in the present embodiment can be easily manufactured by die casting.

  On the other hand, in the present embodiment, since the fixing leg member 36 having a concave shape having a two-sided width has a substantially constant thickness throughout, it is easier to manufacture by pressing a steel plate or the like. It is said that. However, it is also possible to make the wall thickness of the bottom wall portion and the side wall portion different from each other, or to reinforce the fillet at the rising portion of the side wall portion from the bottom wall portion.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the specific descriptions in the embodiments, and various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art. It is feasible in the form which added.

  For example, in the said embodiment, although the assembly | attachment part 42 was inserted by the press-fit state with respect to the fitting part 54, it is not limited to this aspect. That is, the distance E between the opposing surfaces of the side walls of the fixing leg member may be slightly larger than the thickness dimension D of the block member. The assembling part may be fitted into the fitting part with a slight gap. In such a case, for example, it is bolted with fastening bolts at two locations on both sides in the width direction of the assembling part. You may do it. Moreover, in the part pinched | interposed by the side wall part which comprises a fitting part, one or more fitting protrusions which protrude toward the side wall part from the surface of an assembly part are formed, and the protrusion front-end | tip of those fitting protrusion parts It is also possible to adjust the contact state between the assembly part and the fitting part by superimposing only the surface in contact with the side wall part.

  The fitting portion is not limited to the groove shape as in the above embodiment, and may be, for example, an annular peripheral wall structure that surrounds the entire periphery of the assembling portion. You may provide the surrounding wall contact | abutted also to another surface in addition to the surface. Further, the fixing leg member does not necessarily have a bottom wall portion, for example, a cylindrical peripheral wall portion that is superimposed on the outer peripheral surface of the assembly portion, and extends outward from the outer peripheral surface of the peripheral wall portion. A structure including a plurality of leg portions can also be employed.

  Moreover, in the said embodiment, although the assembly | attachment part 42 was press-fitted and fixed with respect to the fitting part 54, in the state which positioned the assembly part of the block member in the predetermined fastening position with respect to the fixing leg member, for example It is also possible to form a fitting part that presses the fixing leg member to raise the side wall part and sandwich the assembly part. Thereby, the assembly | attachment part can be distribute | arranged to the position inserted in the fitting part simultaneously with formation of the fitting part.

  Note that the fastening means between the block member and the fixing leg member is not limited to the bolt fixing as in the above-described embodiment, but is a rivet, caulking fixing, locking fixing by a locking piece raised by cutting and raising, etc. Conventionally known fastening means may be employed. Further, the arrangement position and number of bolts, rivets and the like constituting the fastening means can be arbitrarily set without being limited to the above embodiment.

  Further, the specific structure of the mount body 14 is not limited, and various types including a fluid-filled vibration isolator and an active vibration isolator that actively switches characteristics according to the required vibration isolating characteristics. A structural mount body may be employed. Note that the structure for holding the mount body to the block member is not limited to the fixing structure of the rubber elastic body 12, and for example, the outer cylindrical member spaced apart on the outer peripheral side of the inner shaft member is connected by the rubber elastic body. In the case of the known cylindrical mount, the outer cylindrical member can be press-fitted and held in the inner hole of the block member.

  Furthermore, the block member is not limited to the cylindrical shape as in the above-described embodiment. For example, when it is not necessary to configure a rebound stopper mechanism or a lateral stopper mechanism, the lower half circumference including the assembly portion 42 is included. A block member made up of portions can also be employed.

  Furthermore, in the said embodiment, although the engine mount 10 for motor vehicles was shown as a vibration isolator which concerns on this invention, it is not limited to this aspect. That is, the present invention can be applied to various anti-vibration devices other than those for automobiles, in addition to various anti-vibration devices such as sub-frame mounts for automobiles. Further, the vibration control device may be for a vehicle or a vehicle other than the vehicle. For example, the present invention can be applied to a dynamic damper in which a vibration member to be controlled is a vehicle body of an automobile.

10: engine mount (vibration isolation device), 12: rubber elastic body, 14: mount body (vibration isolation device main body), 16: bracket for vibration isolation device, 18: power unit (vibration member, one of which constitutes vibration transmission system) Members), 20: vehicle body (the other member constituting the vibration transmission system), 22: mounting member, 34: block member (main body side thick member), 36: fixing leg member, 40: peripheral wall (main body holding) Part), 42: assembly part, 46: fastening bolt hole, 52: side wall part (fitting wall), 54: fitting part, 58: bolt hole, 61: fastening part, 62: fastening bolt, 64: Fixing bolt

Claims (8)

In the vibration isolator bracket for attaching the vibration isolator main body configured to include the rubber elastic body to the vibration member,
A main body holding portion for holding the vibration isolator main body, and a main body side thick member whose material is light metal or synthetic resin;
It includes a fitting portion having a groove-like recess, and is made of a ferrous metal and includes a fixing leg member that is thinner than the main body-side thick member,
The main body side thick member is provided with an assembly portion that is fitted into the fitting portion of the fixing leg member, and the main body side wall thickness is fitted into the fitting portion of the assembly portion. A bracket for an anti-vibration device, wherein a fastening portion for fastening the member and the fixing leg member to each other is provided.   The anti-vibration device bracket according to claim 1, wherein the fitting portion has a two-sided width and opens toward the main body holding portion, and has a concave shape into which the assembly portion is fitted.   The fitting portion includes a pair of fitting walls that are opposed to each other with a two-sided width, and the assembly portion is fitted between the opposing surfaces of the pair of fitting walls. The bracket for a vibration isolator according to claim 2, wherein the opposing surfaces of the pair of fitting walls are overlapped in a contact state.   The fastening portion for fastening the main body side thick member and the fixing leg member to each other is provided across the assembly portion of the main body side thick member and the fitting portion of the fixing leg member. The anti-vibration device bracket according to any one of claims 1 to 3, further comprising: a fastening bolt hole to be inserted; and a fastening bolt inserted into the fastening bolt hole. The vibration isolator main body includes an attachment member connected to the main body side thick member through the rubber elastic body, and is fixed to one member constituting the vibration transmission system in the attachment member, The fixing leg member is fixed to the other member constituting the vibration transmission system,
The vibration isolator according to claim 4, wherein a fixing bolt for fixing the mounting member to the one member constituting the vibration transmission system is arranged in parallel with the fastening bolt. Bracket for.   The said main body side thick member is made into the thick cylindrical shape, The said vibration isolator main body is distribute | arranged to the inner hole of this main body side thick member. Bracket for vibration isolator.   The vibration isolator bracket according to any one of claims 1 to 6, wherein the main body side thick member is a molded product, and the fixing leg member is a press molded product.   The vibration isolator main body is assembled | attached with respect to the bracket for vibration isolators in any one of Claims 1-7.

Images