Vibration isolator

Abstract

To provide a vibration control device capable of simplifying a manufacturing process, and damping and absorbing input vibration by receiving the input vibration in a stable state in the compression direction.SOLUTION: In the outer member 12, the pair of inclined joint surfaces 13 are formed in the long side portion of the inner surface 12a to which the elastic body 15 is bonded, so that the inner surface 12a has a concave shape. In the elastic body 15, side edge portions 15a extending in the long axis direction X are respectively bonded to the pair of inclined joint surfaces 13 on the 12a of the inner surface of the outer member 12. The inner member 14 is embedded inside the elastic body 15 in a state where an end portion opening 14a is opened to a side surface of the elastic body 15. The vibration control body tool 11 is stored in the installation opening 20a in a state of pre-compressing the elastic body 15 in the long axis direction X. The distal end joint 31 of the second bracket 30 is joined to the tubular member 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an anti-vibration device, and in particular to an anti-vibration device comprising an anti-vibration main body having an outer member joined to either a vibration generating part or a vibration receiving part, an inner member joined to the other, and an elastic body connecting the outer member and the inner member. [Background technology]

[0002] For example, automobiles, construction machinery, etc. are subjected to or generate vibrations, impacts, noises, creaking sounds, etc. while traveling or being driven. In order to protect automobiles, construction machinery, etc. from such vibrations and impacts and to suppress the generation of noises and creaking sounds, various types of vibration-damping devices are used as components of mounting members such as engine mounts and suspension mounts, and are preferably attached to each vehicle or machine in, for example, several dozen locations.

[0003] Furthermore, for example, Patent Document 1 discloses, as an example of such a vibration-damping device, a vibration-damping device that is preferably mounted between an engine or the like, which is a vibration-generating part, and a vehicle body or the like, which is a vibration-receiving part. According to the vibration-damping device of Patent Document 1, in conventional vibration-damping devices, when axial vibration along the central axes of an outer mounting member joined to either the vibration-generating part or the vibration-receiving part, and an inner mounting member joined to the other, is input, the elastic body undergoes shear deformation rather than compressive deformation, and the vibration cannot be reliably attenuated or absorbed. In contrast, to solve this technical problem, the elastic body is made more susceptible to compressive deformation regardless of the input direction of the vibration, including the axial direction, thereby making it possible to reliably attenuate and absorb the input vibration. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6704807 Summary of the Invention [Problem to be solved by the invention]

[0005] That is, the vibration-damping device of Patent Document 1 is configured to include an outer member attached to either the vibration generating part or the vibration receiving part, a tubular member attached to the other, and an elastic body connecting these, wherein the outer member comprises a frame-shaped member having a rectangular shape when viewed from above, and the elastic body is formed into a rectangular parallelepiped of a considerable height having a rectangular shape when viewed from above, the tubular member is arranged inside the frame-shaped member when viewed from above, and the central axis of the tubular member extends in the direction of the short side of the rectangular shape of the frame-shaped member when viewed from above. Furthermore, the lower edge of the long side portion of the frame-shaped member that forms the long side of the rectangular shape in top view is located inside the upper edge of the long side portion in the short side direction, the long side portion of the elastic body that forms the long side of the rectangular shape in top view is bonded to the inner peripheral surface of the long side portion of the frame-shaped member, and the short side portion that forms the short side of the rectangular shape in top view is preferably pre-compressed and abuts the outer member in the long side direction in which the long side extends in top view without being bonded. This allows input vibration in the long side direction to be received in the compression direction not only by the long side portion of the elastic body but also by the short side portion, making it easier for the elastic body to compress and deform regardless of the input direction of the vibration, thereby ensuring attenuation and absorption of the input vibration.

[0006] However, in the vibration-damping device of Patent Document 1, in order to pre-compress the elastic body preferably in the long side direction, it is necessary to form the outer frame-shaped member into a ship shape and to perform drawing processing on the short side portion of the ship-shaped frame member in a separate process, which results in extra steps and costs.In addition, since the elastic body needs to be abutted against the short side portion of the frame-shaped member without adhesive within the height range of the ship-shaped frame member, this creates design constraints and it cannot be said that the elastic body is necessarily able to absorb input vibrations in the long side direction in a stable and efficient manner in the compression direction.Therefore, it is desirable to be able to efficiently absorb input vibrations in the compression direction in a more stable state, regardless of the input direction of the vibration, and to more reliably attenuate and absorb input vibrations.

[0007] To provide an anti-vibration device which simplifies the manufacturing process, efficiently receives input vibration in a compression direction in a more stable state regardless of the input direction of the vibration, and more reliably attenuates or absorbs the input vibration. [Means for solving the problem]

[0008] The present invention provides a vibration-damping device that includes an outer member having a rectangular planar shape and joined to either a vibration generating unit or a vibration receiving unit, an inner member joined to the other, and an elastic body connecting the outer member and the inner member, and that can attenuate or absorb input vibrations by compressive deformation of the elastic body regardless of the input direction of the vibration. The outer member is joined to either the vibration generating unit or the vibration receiving unit via the first bracket by the outer member being housed as a single unit in a first bracket having a hollow rectangular mounting opening, and the outer member has a thick plate shape, and the inner surface to which the elastic body is adhesively joined has a pair of inclined joining surfaces that are each inclined obliquely from the edge in the short side direction toward the center in the short side direction along the long side portions on both sides of the rectangular planar shape, thereby forming a concave or convex inner surface, and the elastic body is arranged so that the inner surface is the elastic body is formed into a three-dimensional shape of a considerable height in a longitudinal direction, and both side edge portions extending along the longitudinal direction in the height region on the side joined to the outer member are each adhesively joined to the inclined joining surface on the inner surface of the outer member, the inner member is embedded as a unit inside the elastic body with at least one end face facing the side face of the elastic body along the longitudinal direction, the vibration-damping main body compresses and deforms the elastic body in the longitudinal direction and brings the tip faces on both sides of the elastic body in the longitudinal direction into close contact without adhesive with the inner wall surfaces of the mounting opening of the first bracket that face the long side direction of the mounting opening, so that the elastic body is housed in the mounting opening in a state where it is pre-compressed in the longitudinal direction, and the tip joining portion of the second bracket that is attached to either the vibration generating unit or the vibration receiving unit is joined to the inner member.

[0009] Furthermore, it is preferable that the vibration-damping device of the present invention has an inner member that is a cylindrical member and is embedded inside the elastic body with at least one open end face facing the side surface along the longitudinal axis direction of the elastic body, and that the tip joint portion of the second bracket is inserted into the hollow interior and joined.

[0010] In addition, in the vibration-damping device of the present invention, it is preferable that the elastic body has a contact protrusion that protrudes in the longitudinal direction on each end face portion on both sides in the longitudinal direction, and that the contact protrusions, when pre-compressed in the longitudinal direction, each abut in close contact with the inner wall surface facing the long side of the mounting opening without adhesive.

[0011] Furthermore, in the vibration-damping device of the present invention, it is preferable that the inner member is embedded inside the elastic body in a height region opposite the outer member to which the elastic body is joined, and that the abutment protrusions are each provided protruding in the longitudinal direction on the end face portions on both sides of the longitudinal direction of the elastic body in the height region between the inner member and the outer member.

[0012] Furthermore, it is preferable that the vibration-damping device of the present invention has stopper protrusions that protrude in the longitudinal direction on both end face portions of the elastic body in the longitudinal direction in the height region where the inner member of the elastic body is embedded, with a gap maintained between them and the inner wall surface facing the long side direction of the mounting opening.

[0013] In addition, in the vibration-damping device of the present invention, a positioning protrusion is provided on the inner wall surface facing the long side direction of the hollow rectangular mounting opening of the first bracket, from one inner wall surface facing the short side direction to the other inner wall surface, protruding inward at a distance equivalent to the thickness of the long side portion of the rectangular planar shape of the outer member, and the outer member is mounted on the portion between the positioning protrusion and the one long side portion facing the short side direction, preferably so that the vibration-damping main body is accommodated in the mounting opening with the elastic body pre-compressed in the long axis direction. [Effects of the Invention]

[0014] According to the vibration-damping device of the present invention, the manufacturing process is simplified and the input vibration can be efficiently received in the compression direction in a more stable state regardless of the input direction of the vibration, thereby more reliably attenuating and absorbing the input vibration. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view illustrating a vibration isolation device according to a preferred embodiment of the present invention. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1, showing a state in which the vibration-isolating main body is housed in the first bracket. [Figure 3] 1. FIG. 4 is a perspective view illustrating a state in which a tip joint portion of a second bracket is inserted into a cylindrical member of the vibration-damping device of FIG. [Figure 4] 4 is a partially cutaway cross-sectional view taken along the line BB in FIG. 3, showing a state in which a tip joint portion of a second bracket is joined to a cylindrical member of the vibration-damping device in FIG. 1. FIG. [Figure 5] FIG. [Figure 6] 5A is a cross-sectional view taken along line DD in FIG. 5, and FIG. 5B is a cross-sectional view taken along line EE in FIG. [Figure 7] FIG. 1(a) is a front view of the first bracket, and FIG. 1(b) is a cross-sectional view taken along FF in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] 1 and 2, a vibration-damping device 10 according to a preferred embodiment of the present invention is mounted between an engine (not shown), which is a vibration generating part, and an engine frame (not shown), which is a vibration receiving part, in various vehicles, such as private automobiles, and is used as a component of an engine mount that enables input vibration to be damped or absorbed. The vibration-damping device 10 of this embodiment includes a first bracket 20 that is mounted to either the vibration generating part or the vibration receiving part, and a vibration-damping main body 11 that is housed in the first bracket 20. The vibration-damping main body 11 is housed in the hollow rectangular mounting opening 20a of the first bracket 20 with the elastic body 15 of the vibration-damping main body 11 simply pre-compressed in the longitudinal axis direction X, thereby allowing input vibration to be efficiently received in the compression direction regardless of the input direction of the vibration, thereby enabling input vibration to be damped or absorbed more reliably and in a more stable state.

[0017] The vibration-damping device 10 of this embodiment is composed of an outer member 12 having a rectangular planar shape, which serves as either the vibration-generating part or the vibration-receiving part and is preferably joined to either the engine or the engine frame of the vehicle, an inner member 14 joined to the other, and a vibration-damping main body 11 (see Figures 5 and 6(a) and (b)) which has an elastic body 15 connecting the outer member 12 and the inner member 14.In this vibration-damping device, which is capable of attenuating or absorbing input vibrations by compressive deformation of the elastic body 15 regardless of the direction of input of the vibration, the outer member 12 is joined to, for example, either the engine or the engine frame via the first bracket 20 by the vibration-damping main body 11 being housed integrally in a first bracket 20 having a hollow rectangular mounting opening 20a, as shown in Figures 1 and 2. 5 and 6(a) and (b), the outer member 12 has a thick plate shape, and the inner surface 12a to which the elastic body 15 is adhesively bonded has a pair of inclined bonding surfaces 13 that are inclined obliquely from the edge portions in the short side direction Y toward the center in the short side direction Y along both long side portions of the rectangular planar shape, thereby forming a preferably concave inner surface. The elastic body 15 is formed into a three-dimensional shape with a considerable height in the long axis direction X in a plan view, and both side edge portions 15a extending along the long axis direction X in the height region on the side to be bonded to the outer member 12 are adhesively bonded to the inclined bonding surfaces 13 of the inner surface 12a of the outer member 12 (see FIG. 6(b)). The inner member 14 is embedded integrally within the elastic body 15 with at least one end surface (open end surface) 14a facing a side surface of the elastic body 15 along the long axis direction X. The vibration-damping main body 11 compresses and deforms the elastic body 15 in the long axis direction X, while bringing tip surfaces 15b on both sides of the elastic body 15 in the long axis direction X into close contact without adhesive with inner wall surfaces 20b of the mounting opening 20a of the first bracket 20 that face the long side direction X of the mounting opening 20a, so that the elastic body 15 is housed in the mounting opening 20a in a state where it is pre-compressed in the long axis direction X. As shown in Figures 3 and 4, a tip joint portion 31 of a second bracket 30 that is attached to the other of the engine, which is a vibration generating part, or the engine frame, which is a vibration receiving part, is joined to the inner member 14.

[0018] In addition, in this embodiment, the inner member 14 is preferably a hollow cylindrical member, as shown in Figures 2 and 6(a) and (b), and is embedded inside the elastic body 15 with at least one open end face 14a facing the side surface along the longitudinal axis direction X of the elastic body 15, and the tip joint portion 31 of the second bracket 30 is inserted into the hollow interior and joined.

[0019] Furthermore, in this embodiment, as shown in FIG. 6(a), the elastic body 15 preferably has abutment protrusions 16 protruding in the longitudinal direction on end surface portions 15b on both sides in the longitudinal direction X, and these abutment protrusions 16 are in close contact with, without bonding, inner wall surfaces 20b of the mounting opening 20a of the first bracket 20 that face the longitudinal direction X while being pre-compressed in the longitudinal direction X (see FIG. 2).

[0020] Furthermore, in this embodiment, the preferably cylindrical inner member 14 is embedded inside the elastic body 15 in a height region opposite to the outer member 12 to which the elastic body 15 is joined, and the abutment protrusions 16 are provided in the height region between the inner member 14 and the outer member 12 on end face portions 15b on both sides of the elastic body 15 in the longitudinal direction X so as to protrude in the longitudinal direction X.

[0021] Furthermore, in this embodiment, stopper protrusions 17 protruding in the long axis direction X are provided on short face portions on both sides of the long axis direction X of the elastic body 15, preferably in the height region where the inner member 14 of the elastic body 15 is embedded, with a gap maintained between them and the inner wall surface 20b facing the long side direction X of the mounting opening 20a of the first bracket 20 (see FIG. 2).

[0022] 1, 2, and 7(a) and 7(b), the first bracket 20 constituting the vibration-damping device 10 is a metal bracket preferably made of aluminum, and has a hollow rectangular cross-sectional shape in which an attachment opening 20a is surrounded by a pair of long-side peripheral walls 21a arranged parallel to and spaced apart and a pair of short-side peripheral walls 21b arranged parallel to and spaced apart. The bracket also includes a housing main body 21 having a rectangular planar shape, and a first fixed plate portion 22a having a square shape in plan view and a second fixed plate portion 22b having a triangular shape in plan view, which are provided so as to protrude outward from both sides of one of the long-side peripheral walls 21a of the housing main body 21. Bolt fastening holes 22c are formed through the first fixed plate portion 22a and the second fixed plate portion 22b, and the first bracket 20 can be fixed to, for example, a vehicle engine frame, which is a vibration receiving portion, by fastening fixing bolts (not shown) into the bolt fastening holes 22c.

[0023] The mounting opening 20a formed by the rectangular hollow interior of the housing main body 21 has one surface in the short side direction Y that is an open, horizontally elongated rectangular opening, and the other surface in the short side direction Y that is preferably closed by a back panel 24 having a thick portion 24a. The mounting opening 20a forms a housing section for accommodating the vibration-damping main body 11 as a whole. Preferably, on both inner wall surfaces 20b of the hollow rectangular mounting opening 20a in the accommodating main body 21 of the first bracket 20, formed by the short side peripheral walls 21b facing the long side direction X, positioning protrusions 23 are provided protruding inward, for example, from the inner wall surface formed by one long side peripheral wall 21a facing the height direction Z, from which the first fixed platen 22a and the second fixed platen 22b do not protrude, to the inner wall surface formed by the other long side peripheral wall 21a from which the first fixed platen 22a and the second fixed platen 22b protrude, at a distance of a height h (see Figures 2 and 7(b)) equivalent to the thickness t (see Figures 5 and 6(b)) of the long side portion of the rectangular planar shape of the outer member 12 constituting the vibration-damping main body 11. Using this positioning protrusion 23 as a guide, the outer member 12 of the vibration-damping main body 11 is pushed into the mounting opening 20a with its short side direction Y as the mounting direction, and is mounted in the portion between the positioning protrusion 23 and one of the long side peripheral walls 21a facing the height direction Z. As a result, the vibration-damping main body 11 is accommodated in the mounting opening 20a with the elastic body 15 pre-compressed in the long axis direction X, as will be described later.

[0024] As shown in FIGS. 5, 6(a), and 6(b), the vibration-damping main body 11 constituting the vibration-damping device 10 includes an outer member 12, an inner member 14, and an elastic body 15. The outer member 12 is a metal member made of, for example, aluminum, and is preferably formed by extrusion molding into a rectangular planar shape, as described above, and is formed into a thick plate shape with a substantial thickness of, for example, about 5 to 20 mm. The inner surface 12a of the outer member 12, which is the surface to which the elastic body 15 is adhesively bonded, has a pair of inclined bonding surfaces 13 formed on edges along both long sides of the rectangular planar shape, each of which has a substantial width and slopes obliquely downward from the end edge in the short side direction Y toward the center in the short side direction Y. As a result, the inner surface 12a of the outer member 12, which is the surface to which the elastic body 15 is adhesively bonded, preferably has a concave shape. On these inclined joining surfaces 13, portions 15a along a pair of long sides of the rectangular planar shape in the height region of the elastic body 15 on the side that is joined to the outer member 12 serve as a pair of adhesive joining legs 18, and these adhesive joining legs 18 are abutted from an oblique direction and are each adhesively joined, preferably by vulcanization adhesion.

[0025] The elastic body 15 is made of various rubber materials known, for example, as materials for vibration-proof bushings. The elastic body 15 is formed by vulcanization molding, as described below, into a shape having a longitudinal axis direction X in a plan view, preferably a rectangular planar shape, and a three-dimensional shape having a considerable height that can be divided into a leg region 19a, a pre-compression region 19b, and an embedded region 19c in the height direction Z. The leg region 19a is a height region on the outer member 12 side, and is adhesively bonded obliquely to a pair of inclined bonding surfaces 13 of the outer member 12. The pair of adhesively bonded legs 18 are provided on both sides of a hollow portion 18a in the short side direction Y. The pair of adhesively bonded legs 18 are formed by side edge portions 15a on both sides of the leg region 19a of the elastic body 15 extending along the longitudinal axis direction X. Furthermore, each of the pair of adhesive joint legs 18 is arranged to extend continuously along the long side portion of the outer member 12, which preferably has a rectangular planar shape, and the pair of adhesive joint legs 18 are adhered in close contact with the inclined joint surface 13 of the outer member 12, preferably at an angle close to the vertical direction.

[0026] This allows the pair of adhesively bonded legs 18 in the leg region 19a of the elastic body 15 to be easily compressively deformed in both the height direction Z and the short side direction Y due to elasticity. This also allows the pair of adhesively bonded legs 18 in the leg region 19a of the elastic body 15 to absorb, in the compression direction, both input vibration in the short side direction Y that is applied to the vibration-damping device 10 and input vibration in the height direction Z that is perpendicular to the short side direction Y and the long side direction X, thereby effectively attenuating or absorbing these input vibrations in the short side direction Y and the height direction Z. On the other hand, the pair of adhesively bonded legs 18 in the leg region 19a of the elastic body 15 can only absorb input vibration in the long side direction X in the shear direction.

[0027] The pre-compression region 19b is disposed closer to the tip end than the leg region 19a and is a region at a different height in the height direction Z from the leg region 19a, and is a portion interposed between the leg region 19a and the embedded region 19c. The pre-compression region 19b has a rectangular planar cross-sectional shape whose width in the short side direction Y is smaller than that of the leg region 19a, and preferably has abutting protrusions 16 protruding from end surface portions 15b on both sides in the long axis direction X of the rectangular planar cross-sectional shape. The length of the pre-compression region 19b in the long axis direction X, including the abutting protrusions 16, is slightly larger than the length of the leg region 17a in the long axis direction X, the length of the outer member 12 in the long side direction X, and the gap width between a pair of short side peripheral walls 21b facing in the long side direction X of the housing main body portion 21 of the first bracket 20. As a result, when the vibration-damping main body 11 is attached to the attachment opening 20a of the housing main body 21 of the first bracket 20, for example, the pre-compressed region 19b of the elastic body 15 is compressed and deformed in the long axis direction X between the pair of short side peripheral walls 21b, and the end surface portions 15b of the abutting protrusions 16 are slid along the pair of inner wall surfaces 20b facing in the long axis direction X, while the elastic body 15 is pressed in. This also makes it possible to easily maintain the pre-compressed region 19b of the elastic body 15 in the long axis direction X after attachment of the vibration-damping main body 11 to the attachment opening 20a. This also makes it possible to smoothly receive input vibrations in the long axis direction (long axis) X applied to the vibration-damping device 10 in the compression direction by the pre-compressed region 19b of the elastic body 15, and to effectively damp or absorb these input vibrations in the long axis direction (long axis) X by the elastic body 15.

[0028] Here, it is preferable to provide the end surface portions 15b of the compression region 19b by the abutment protrusions 16 with, for example, a number of small-diameter protrusions 16a to reduce the contact area with the inner wall surfaces 20b so that the end surface portions 15b can slide smoothly along a pair of inner wall surfaces 20b facing each other in the long side direction X of the mounting opening 20a when the elastic body 15 is pressed into the mounting opening 20a. This reduces the frictional resistance during the rubbing between the inner wall surfaces 20b and the end surface portions 15b, allowing the elastic body 15 to be pressed into the mounting opening 20a more smoothly. Furthermore, auxiliary metal fittings 14a of the inner member 14, which will be described later, can be embedded in the compression region 19b of the elastic body 15 during vulcanization molding.

[0029] The embedded region 19c is a portion disposed in a height region of the tip portion in the height direction Z of the elastic body 15 integrally bonded to the outer member 12. A cylindrical inner member 14 is preferably embedded integrally in this embedded region 19c with its central axis C (see FIGS. 5 and 6(b)) extending in the short side direction Y of the outer member 12 and its end openings 14a opening on the side surfaces of the long sides. In this embodiment, the embedded region 19c of the elastic body 15 is molded by vulcanization molding using insert molding, which will be described later, to include an inner peripheral covering portion 15c that covers the inner peripheral surface of the cylindrical inner member 14, an outer peripheral covering portion 15d that covers the outer peripheral surface of the cylindrical inner member 14, and end surface covering portions 15e that cover both end surfaces of the cylindrical inner member 14 (see FIGS. 6(a) and 6(b)). The inner peripheral covering portion 15c has a plurality of slide grooves 15f that run across the short side direction Y and are spaced apart circumferentially, thereby improving operability when inserting and joining the tip joint portion 31 of the second bracket 30 through the end opening 14a into the hollow interior of the cylindrical inner member 14.

[0030] Furthermore, the top surface of the outer peripheral covering portion 15d is provided with three abutment convex surfaces 15g, each having a flat, isosceles trapezoidal cross section, arranged in three parallel rows at intervals in the long side direction X. As shown in Fig. 2, these abutment convex surfaces 15g are arranged to be able to abut against the inner wall surface of the other long side peripheral wall 21a from which the first fixed plate portion 22a and the second fixed plate portion 22b protrude when the vibration-damping main body 11 is housed in the mounting opening 20a of the first bracket 20. As a result, the abutment convex surfaces 15g function as a stopper that prevents the preferably cylindrical inner member 14, to which the tip joint portion 31 of the second bracket 30 is inserted and joined, from moving excessively in the height direction Z due to deformation of the elastic body 15 (see Fig. 4).

[0031] Furthermore, in this embodiment, as described above, the stopper protrusions 17 are provided on the side surfaces of the short sides of the elastic body 15 on both sides in the long side direction X of the embedded region 19c, which is the height region in which the inner member 14 is embedded. The stopper protrusions 17 are provided so as to be able to abut against the inner wall surfaces 20b of the mounting opening 20a of the first bracket 20 that face the long side direction X, while maintaining a gap between them (see FIG. 2). As a result, the stopper protrusions 17 function as a stopper that prevents the cylindrical inner member 14, into which the tip joint portion 31 of the second bracket 30 is inserted and joined, from moving excessively in the long side direction X due to deformation of the elastic body 15.

[0032] The inner member 14, which constitutes the vibration-damping main body 11 together with the outer member 12 and the elastic body 15, is formed into a cylindrical shape by pressing a metal plate, such as a thin steel plate, so as to have a hollow cross-sectional shape that is preferably horizontally elongated and rectangular, and is arranged to be embedded in the embedded region 19c of the elastic body 15. Preferably, an auxiliary metal member 14a (see FIG. 6(b)) having a U-shaped cross-section protrudes from the surface of the cylindrical inner member 14 facing the outer member 12 and is attached to the inner member 14 by joining a pair of ends to the surface facing the outer member 12 by welding or the like, extending in the long side direction X of the inner member 14, which is rectangular in top view. The auxiliary metal member 14a is arranged to span the pre-compression region 19b and is arranged to be embedded in the elastic body 15.

[0033] The vibration-damping main body 11 having the above-described configuration can be easily obtained, preferably in the same manner as the vibration-damping device described in Patent Document 1, by setting the outer member 12 and the cylindrical inner member 14, to which the reinforcing metal fittings 14a have been previously joined by welding, in a mold, for example, and then vulcanizing the elastic body 15 by insert molding. During the insert molding, a pair of adhesively bonded legs 18 of the leg region 19a of the elastic body 15 can be adhesively bonded to a pair of inclined bonding surfaces 13 on the inner surface 12a of the outer member 12 by vulcanization bonding. This makes it possible to firmly bond the elastic body 15, in which the cylindrical inner member 14 is preferably embedded, and the outer member 12 as a single unit.

[0034] As described above, the obtained vibration-damping main body 11 is formed by, for example, compressing and deforming the pre-compressed region 19b of the elastic body 15 in the long side direction X between a pair of short side peripheral walls 21b of the accommodating main body 21 of the first bracket 20, while sliding the side end surfaces 15b of the abutting protrusions 16 along a pair of inner wall surfaces 20b facing the long side direction X, and pressing the elastic body 15 in.This easily forms the vibration-damping device 10 of this embodiment, in which the vibration-damping main body 11 is accommodated as a single unit in the mounting opening 20a of the accommodating main body 21 of the first bracket 20 with the elastic body 15 pre-compressed in the long axis direction X.

[0035] The formed vibration-damping device 10 is attached in a fixed state to, for example, an engine frame, which serves as the vibration-receiving part, via the first bracket 20, and the tip joint portion 31 of the second bracket 30, which is fixed to, for example, an engine, which serves as the vibration-generating part, is inserted and joined through the end opening 14a to the preferably cylindrical inner member 14 of the vibration-damping main body 11 of the attached vibration-damping device 10, as shown in Figures 3 and 4. In this way, the vibration-damping device 10 is installed between the engine and the engine frame and is used as a component part of an engine mount, which enables input vibrations to be damped or absorbed.

[0036] Furthermore, the vibration-damping device 10 of this embodiment, which has the above-mentioned configuration, simplifies the manufacturing process and allows input vibrations to be efficiently absorbed in the compression direction in a more stable state, regardless of the input direction of the vibrations, thereby more reliably attenuating and absorbing the input vibrations.

[0037] That is, according to this embodiment, the vibration-damping device 10 can be easily manufactured by pressing the vibration-damping main body 11 into the mounting opening 20a of the first bracket 20 while compressing and deforming the elastic body 15 in the longitudinal axis direction X, without requiring processes such as molding the outer member into a boat-shaped frame member or applying drawing to the short side portions of the boat-shaped frame member. Furthermore, the elastic body 15 of the vibration-damping main body 11 has both side edge portions 15a extending along the longitudinal axis direction X on the side that is joined to the outer member 12, and these side edge portions 15a are adhesively joined to the inclined joining surfaces 13 of the inner side surface 12a of the outer member 12, respectively. Furthermore, the elastic body 15 is attached so that its tip surfaces 15b on both sides in the longitudinal axis direction X abut closely but without adhesive against the inner wall surfaces 20b that face the long side direction X of the mounting opening 20a of the first bracket 20, and is pre-compressed in the longitudinal axis direction X. Therefore, regardless of the input direction of the vibration, the input vibration can be efficiently received in the compression direction in a stable state, thereby damping or absorbing the input vibration.

[0038] In particular, according to this embodiment, the elastic body 15 preferably has abutment protrusions 16 that protrude from the tip end surfaces 15b on both sides in the longitudinal direction X, and the abutment protrusions 16 are each provided to protrude in the pre-compression region 19b, which is the height region between the inner member 14 and the outer member 12. This makes it possible to alleviate design constraints and to receive input vibrations in the longitudinal direction X in a balanced manner, thereby making it possible to receive the input vibrations efficiently in the compression direction in a more stable state regardless of the input direction of the vibrations, and to more effectively damp or absorb the input vibrations.

[0039] The vibration-damping device of the present invention is not limited to the above-described embodiment and can be modified in various ways. For example, the abutment projections do not necessarily have to be provided so as to protrude from the tip surfaces on both sides of the longitudinal direction of the elastic body having a longitudinal axis in a plan view in the height region between the inner member and the outer member, and stopper projections protruding in the longitudinal direction do not necessarily have to be provided on both end surfaces of the elastic body in the longitudinal direction in the height region where the inner member is embedded. Positioning projections do not necessarily have to be provided on the inner wall surface facing the long side of the hollow rectangular mounting opening of the first bracket.

[0040] Furthermore, the inner member does not necessarily have to be a cylindrical member, and may be, for example, a solid member with a threaded hole machined into its end surface. In this case, the tip joint portion of the second bracket can be joined to the inner member via, for example, the threaded hole formed in the end surface. The elastic body having the long axis direction in a planar view may have, for example, a rectangular, circular, or triangular cross-sectional shape, and the planar shape having the long axis direction may have a planar shape other than rectangular. The inner surface of the outer member to which the elastic body is adhesively joined may be a convex inner surface having a pair of inclined joint surfaces that are each obliquely inclined toward the center in the short side direction along the long side portion. [Explanation of symbols]

[0041] 10 Anti-vibration device 11 Anti-vibration body 12 Outer member 12a Inside surface 13 Slanted joint surface 14 Inner member 14a Subsidies 14b End opening 15 Elastic Body 15a Along the long side 15b Side end face of short side 15c Inner circumference coating 15d Outer covering part 15e End cover part 15f slide groove 15g Contact convex part 16 Contact protrusion 17 Stopper protrusion 18 Adhesive joint legs 18a Hollow part 19a Leg area 19b Compressed region 19a Buried area 20 First Bracket 20a Mounting opening 20b Inner wall surfaces facing in the long side direction 21 Storage body 21a Long side peripheral wall 21b Short side wall 22a 1st fixed plate part 22b 2nd fixed plate part 22c Bolt fastening hole 23 Positioning ridge 30 Second Bracket 31 Tip joint C: Central axis of cylindrical member X Long axis direction (long side direction) Y Short side direction Z height direction t Thickness of the long side of the outer member h Height equivalent to the thickness of the long side of the outer member

Claims

1. A vibration-damping device comprising an outer member having a rectangular planar shape and joined to either a vibration generating unit or a vibration receiving unit, an inner member joined to the other, and an elastic body connecting the outer member and the inner member, wherein the device is capable of damping or absorbing input vibrations by compressive deformation of the elastic body regardless of the input direction of the vibrations, the outer member is joined to either the vibration generating part or the vibration receiving part via a first bracket having a hollow rectangular mounting opening, with the vibration-damping main body housed integrally in the first bracket; The outer member has a thick plate shape, and the inner surface to which the elastic body is adhesively bonded has a pair of inclined bonding surfaces that are inclined obliquely from the edge portion in the short side direction toward the center in the short side direction along the long side portions on both sides of the rectangular planar shape, thereby forming a concave or convex inner surface, the elastic body is formed into a three-dimensional shape having a considerable height with a long axis direction in a plan view, and both side edge portions extending along the long axis direction in a height region on the side joined to the outer member are adhesively joined to the inclined joining surfaces on the inner surface of the outer member, the inner member is embedded integrally within the elastic body with at least one end surface facing a side surface of the elastic body along the longitudinal axis, the vibration-damping main body is accommodated in the mounting opening in a state in which the elastic body is pre-compressed in the longitudinal direction by compressing and deforming the elastic body in the longitudinal direction and bringing tip surfaces of the elastic body on both sides in the longitudinal direction into close contact with inner wall surfaces of the first bracket that face each other in the longitudinal direction of the mounting opening without adhesive, A vibration-damping device in which a tip joint portion of a second bracket attached to the other of the vibration generating portion and the vibration receiving portion is joined to the inner member.

2. The vibration-damping device described in claim 1, wherein the inner member is a cylindrical member and is embedded inside the elastic body with at least one open end face facing the side surface along the longitudinal axis direction of the elastic body, and the tip joint portion of the second bracket is inserted into the hollow interior and joined.

3. The elastic body has a contact protrusion that protrudes in the longitudinal direction on each end face portion on both sides in the longitudinal direction, and the contact protrusions, when pre-compressed in the longitudinal direction, are in close contact with the inner wall surface facing the long side of the mounting opening without adhesive.

4. The vibration-damping device described in claim 3, wherein the inner member is embedded inside the elastic body in a height region opposite the outer member to which the elastic body is joined, and the abutment protrusions are each provided protruding in the longitudinal direction on the end face portions on both sides of the longitudinal direction of the elastic body in the height region between the inner member and the outer member.

5. 5. An anti-vibration device as described in claim 4, wherein stopper protrusions protruding in the longitudinal direction are provided on both end face portions of the elastic body in the longitudinal direction in the height region where the inner member of the elastic body is embedded, with a gap maintained between them and the inner wall surface facing the long side direction of the mounting opening.

6. A vibration-damping device as described in claim 1 or 2, wherein a positioning protrusion is provided on the inner wall surface facing the long side direction of the hollow rectangular mounting opening of the first bracket, from one inner wall surface facing the short side direction toward the other inner wall surface, protruding inward at a height equivalent to the thickness of the long side portion of the rectangular planar shape of the outer member, and the outer member is mounted using the positioning protrusion as a guide between the positioning protrusion and one of the long side portions facing the short side direction, so that the vibration-damping main body is accommodated in the mounting opening with the elastic body pre-compressed in the long axis direction.

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