Anti-vibration device and stopper member

Abstract

To provide a vibration control device and a stopper member capable of making vibration control performance of a pair of stopper body parts different, and capable of stabilizing an installation state of the pair of stopper body parts to an inner cylinder member.SOLUTION: In this vibration control device 1, an outer peripheral surface part of a vibration control body 5 is fixed to a fixed base part 11 of a first bracket 10, and a second bracket 20 has a U-shaped part having a pair of opposed pieces 21. The stopper member 30 having a pair of stopper main body portions 11s and 11s is attached between the pair of facing pieces 21 and both side surfaces 31a and 31b of the fixed base portion 11 in a state where the engaging opening 35 is engaged with each protruding end portion 2e on both sides of the inner tubular member 2, and the pair of stopper main body portions 31a and 31b are connected to each other via the connecting belt 50 having the connecting means 51 and extending from one or both of the stopper main body portions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vibration-isolating device and a stopper member used in the vibration-isolating device. [Background technology]

[0002] A known vehicle engine mount is a vibration-damping device that includes an inner cylindrical member and a vibration-damping body that has a rubber elastic body disposed around it, a cylindrical first bracket into which the vibration-damping body is inserted, and a U-shaped second bracket fixed to both ends of the inner cylindrical member. This vibration-damping device includes a pair of stopper main bodies attached to both ends of the inner cylindrical member, and the stopper main bodies are interposed between the first bracket and the U-shaped second bracket in the axial direction of the inner cylindrical member. As an example of the above-mentioned vibration-damping device, Patent Document 1 discloses a rubber member in which a second stopper rubber attached to the outer tube member is connected to a first stopper rubber attached to an inner tube member or a bracket, and which has a pair of main body portions interposed between the axial end of the tubular portion of the outer tube member and the bracket, via an elastic member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-248947 Summary of the Invention [Problem to be solved by the invention]

[0004] The rubber member described in Patent Document 1 has a pair of main bodies (a pair of stopper main bodies) arranged at both axial ends of an inner cylindrical member connected by a connecting portion extending in the axial direction, and the first stopper rubber, the second stopper rubber, and the elastic member, which comprise the pair of main bodies, are integrally molded. In this rubber member, the pair of stopper main bodies are made of the same rubber material, so it is not possible to differentiate the vibration-damping performance at both axial ends of the inner cylindrical member. On the other hand, if the pair of stopper main bodies were molded from different rubber materials to differentiate the vibration-damping performance at both axial ends, each of the pair of stopper main bodies would become a separate member. The pair of stopper main bodies are attached to both ends of the inner cylindrical member by inserting the ends into engagement openings formed in the main bodies, and then a first bracket including the vibration-damping main body is attached to a second bracket. However, simply inserting the stopper main body may result in the stopper main body falling off the inner cylindrical member before attachment to the second bracket. One possible solution to this problem is to join the first bracket and the stopper body with an additional joining means such as adhesive, but this is not desirable from the viewpoint of manufacturing costs.

[0005] The present invention relates to an anti-vibration device and a stopper member that can differentiate the anti-vibration performance of a pair of stopper body portions and stabilize the attachment state of the pair of stopper body portions to an inner cylindrical member. [Means for solving the problem]

[0006] The present invention provides a vibration-damping device that includes an inner cylindrical member, a vibration-damping body having a rubber elastic body arranged around the outer periphery of the inner cylindrical member, a first bracket into which the vibration-damping body is inserted, and a second bracket fixed to the inner cylindrical member, and is attached between a vibration generating part and a vibration receiving part, the first bracket is attached to one of the vibration generating unit and the vibration receiving unit, and the second bracket is attached to the other of the vibration generating unit and the vibration receiving unit, an outer peripheral surface of the vibration-isolating body is fixed to a fixed base portion of the first bracket; the second bracket has a U-shaped portion having a pair of opposing pieces extending parallel to each other from the fixed plate portion, and both protruding end portions extending from the side surfaces of the fixed base portion are fixed to the pair of opposing pieces, a stopper member having a pair of stopper main bodies is attached between the pair of opposing pieces and both side surfaces of the fixed base part in a state in which engagement openings formed in the stopper main bodies are engaged with the protruding end portions on both sides of the inner cylindrical member, The pair of stopper body portions are connected to each other via a connecting belt having connecting means extending from either or both of the stopper body portions, thereby providing a vibration-damping device.

[0007] The present invention also provides a stopper member for use in a vibration-damping device, comprising: The vibration-damping device includes an inner cylindrical member, a vibration-damping main body having a rubber elastic body arranged around the outer periphery of the inner cylindrical member, a first bracket into which the vibration-damping main body is inserted, and a second bracket fixed to the inner cylindrical member, and is attached between a vibration generating part and a vibration receiving part, the first bracket is attached to one of the vibration generating unit and the vibration receiving unit, and the second bracket is attached to the other of the vibration generating unit and the vibration receiving unit, an outer peripheral surface of the vibration-isolating body is fixed to a fixed base portion of the first bracket; the second bracket has a U-shaped portion having a pair of opposing pieces extending parallel to each other from the fixed plate portion, and both protruding end portions extending from the side surfaces of the fixed base portion are fixed to the pair of opposing pieces, The stopper member has a pair of stopper main bodies, Each of the pair of stopper main body portions includes an engagement ring portion having an engagement opening that is engaged with the protruding end portion of the inner cylindrical member of the vibration-damping main body, and a bracket abutment portion that projects outward from the engagement ring portion and is disposed between a side surface of the fixed base portion and the opposing piece, The stopper member is provided such that the pair of stopper body portions can be connected to each other via a connecting belt that extends from either or both of the pair of stopper body portions and has connecting means. [Effects of the Invention]

[0008] According to the vibration-damping device and stopper member of the present invention, it is possible to differentiate the vibration-damping performance of the pair of stopper main bodies, and to stabilize the attachment state of the pair of stopper main bodies to the inner cylindrical member. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an embodiment of the vibration isolation device of the present invention. [Figure 2] FIG. 2 is a front view showing the vibration-isolating main body and the first bracket of FIG. [Figure 3] FIG. 3(a) is a plan view showing the stopper member of FIG. 1 in an expanded state, and FIG. 3(b) is a cross-sectional view schematically showing the connected state of the connecting means provided in the stopper main body. [Figure 4] FIG. 4 is a view corresponding to FIGS. 4(a) and 4(b) and shows another embodiment of the stopper member according to the present invention. [Figure 5] FIG. 5 is a view corresponding to FIGS. 4(a) and 4(b), showing still another embodiment of a stopper member according to the present invention. [Figure 6] FIG. 6 is a view corresponding to FIGS. 4(a) and 4(b) and shows still another embodiment of the stopper member according to the present invention. [Figure 7] FIG. 7 is a view corresponding to FIGS. 4(a) and 4(b) and shows still another embodiment of the stopper member according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The vibration isolation device of the present invention will be described below based on its preferred embodiments. Figures 1 and 2 show a vibration isolation device 1 of this embodiment. The vibration isolation device 1 is mounted between a vibration generating part and a vibration receiving part, and suppresses the transmission of vibrations from the vibration generating part to the vibration receiving part. The vibration isolation device 1 is mounted on a vehicle such as an automobile, and is used as an engine mount mounted between the engine of the vehicle, which is the vibration generating part, and the engine frame of the vehicle, which is the vibration receiving part.

[0011] 1, the vibration isolation device 1 is configured to include a vibration isolation main body 5, a first bracket 10 to which the vibration isolation main body 5 is attached, and a U-shaped second bracket 20. The first bracket 10 is attached to one of the vibration generating part and the vibration receiving part, and the second bracket 20 is attached to the other of the vibration generating part and the vibration receiving part. For example, the second bracket 20 may be attached to an engine (not shown) as a vibration generating part, and the first bracket 10 may be attached to the vehicle body as a vibration receiving part, or conversely, the first bracket 10 may be attached to the vibration generating part and the second bracket 20 to the vibration receiving part.

[0012] The vibration-damping main body 5 comprises an inner cylindrical member 2 and a rubber elastic body 4 arranged around the outer periphery of the inner cylindrical member 2. In addition to the inner cylindrical member 2 and the rubber elastic body 4, the vibration-damping main body 5 of this embodiment also comprises an outer cylindrical member 3, with the rubber elastic body 4 elastically connecting the outer periphery of the inner cylindrical member 2 and the inner periphery of the outer cylindrical member 3. The inner cylindrical member 2 and the outer cylindrical member 3 are each a cylindrical member made of metal, with the inner diameter of the outer cylindrical member 3 being larger than the outer diameter of the inner cylindrical member 2. In the vibration-damping main body 5, the inner cylindrical member 2 is located radially inward of the outer cylindrical member 3, and the outer peripheral surface of the outer cylindrical member 3 forms the outer peripheral surface of the vibration-damping main body 5. In this vibration-damping main body 5, the axial directions of the inner cylindrical member 2 and the outer cylindrical member 3 extend in the same direction.

[0013] In the vibration-damping body 5 of this embodiment, the central axes of the inner cylindrical member 2 and the outer cylindrical member 3 are aligned, but the central axis of the inner cylindrical member 2 may be eccentric with respect to the central axis of the outer cylindrical member 3. The rubber elastic body 4 is disposed between the inner cylindrical member 2 and the outer cylindrical member 3. Furthermore, although the vibration-damping main body 5 of this embodiment includes the outer tubular member 3, it does not necessarily have to include the outer tubular member 3. In this case, the outer peripheral surface of the vibration-damping main body 5 is formed by the rubber elastic body 4. Furthermore, the vibration-isolating body 5 may be of a solid type or a liquid-sealed type.

[0014] The vibration isolator 1 has a first direction X that coincides with the axial direction of the vibration isolating body 5, and a second direction Y that is perpendicular to the first direction X (see FIG. 1). In the vibration-damping body 5, both end portions 2e, 2e in the first direction X of the inner cylindrical member 2 (hereinafter also referred to as "protruding end portions 2e, 2e") protrude outward in the first direction X beyond both end portions in the first direction X of the rubber elastic body 4. In addition, the protruding end portions 2e, 2e protrude outward in the first direction X beyond the open end faces on both sides of the outer cylindrical member 3 in the first direction X (see FIG. 2).

[0015] 1, the first bracket 10 has a fixed base portion 11 in which a mounting hole 12 having an axial direction in the first direction X is formed, and a pair of flange portions 15, 16 provided adjacent to both sides of the fixed base portion 11 in the first direction X. The mounting hole 12 is a through-hole that passes through the fixed base portion 11 in the first direction X, and the vibration-damping main body 5 is inserted into the mounting hole 12. In the vibration-damping device 1 of this embodiment, the outer circumferential surface portion of the vibration-damping main body 5 is fixed to the first bracket 10 by fitting the outer tubular member 3 into the mounting hole 12. The fixed base portion 11 has a substantially cylindrical shape due to the presence of the mounting hole 12.

[0016] The flange portions 15, 16 are plate-like portions extending outward in the first direction X from the fixed base portion 11, with one flange portion 15 extending outward from the fixed base portion 11 in one direction in the first direction X and the other flange portion 16 extending outward from the fixed base portion 11 in the other direction in the first direction X. The fixed base portion 11 protrudes from one main surface of the plate-like flange portions 15, 16. In the first bracket 10, the surfaces F1 (hereinafter also referred to as "lower surfaces F1") of the fixed base portion 11 and the flange portions 15, 16 opposite to the mounting hole 12 are flush and continuous, forming a flat surface (see FIG. 2).

[0017] Unless otherwise specified, the vibration-damping device 1 in this specification will be described assuming that the lower surface F1 of the first bracket 10 is the contact surface. In other words, the direction in which the fixed base part 11 protrudes from the flange parts 15, 16 is the vertical direction (hereinafter also referred to as the "third direction Z"), and in the vertical direction, the flange parts 15, 16 side is the lower side, and the side opposite the flange parts 15, 16 is the upper side.

[0018] The pair of flange portions 15, 16 have bolt holes 15a, 16a formed therein that penetrate the flange portions 15, 16 in the third direction Z, and by fastening bolts to the bolt holes 15a, 16a, the first bracket 10 is fixed to either the vibration generating portion or the vibration receiving portion.

[0019] As described above, the vibration-damping main body 5 is inserted, fitted, and fixed in the mounting hole 12 of the first bracket 10. In this state, the outer peripheral surface of the outer tubular member 3 abuts against the inner peripheral surface of the mounting hole 12, and the outer peripheral surface portion of the vibration-damping main body 5 is fixed integrally to the fixed base part 11. In this state, the positions in the first direction X of both side surfaces 11s of the fixed base part 11, which form the opening end faces of the mounting hole 12, and the opening end faces 3f of the outer tubular member 3 (hereinafter also referred to as "outer tube opening end faces 3f") are aligned. When the vibration-damping body 5 is fixed to the first bracket 10, the protruding ends 2e, 2e of the inner tube member 2 protrude outward in the first direction X from the outer tube opening end face 3f and both side faces 11s, 11s of the fixed base portion 11 (see Figure 2).

[0020] 1, the second bracket 20 has a fixed platen portion 23 whose main surface faces the second direction Y, and a pair of opposing pieces 21, 21 that protrude parallel to each other from the fixed platen portion 23. The pair of opposing pieces 21, 21 face each other in the first direction X and extend in the second direction Y from both side edges of the fixed platen portion 23 in the first direction X. The second bracket 20 has a U-shape formed by the pair of opposing pieces 21, 21 and the fixed platen portion 23. An insertion hole 21a that penetrates the opposing pieces 21 is formed in the pair of opposing pieces 21, 21.

[0021] In the vibration-damping device 1, the second bracket 20 is disposed so that the opposing piece 21 faces both side surfaces 11s, 11s of the fixed base part 11. In other words, by disposing the fixed base part 11 between the pair of opposing pieces 21, 21, the second bracket 20 covers the side surface 11s of the fixed base part 11 with the opposing piece 21 and partially covers the outer peripheral surface of the fixed base part 11 with the fixed platen part 23, thereby surrounding the fixed base part 11 on three sides. After a pair of stopper main bodies 31a, 31b (described later) are attached between the opposing pieces 21 and the outer tube opening end surface 3f, the protruding ends 2e, 2e of the inner tube member 2 are inserted into the insertion holes 21a, 21a of the pair of opposing pieces 21, 21, thereby fixing each of the protruding ends 2e, 2e to the opposing pieces 21, 21. In this manner, the second bracket 20 is fixed to the inner tube member 2.

[0022] 1 and 2, the vibration-damping device 1 includes a rubber stopper member 30 attached between the first and second brackets 10, 20 on both sides in the first direction X. The stopper member 30 has a pair of stopper main bodies 31a, 31b and a connecting belt 50 that connects these stopper main bodies 31a, 31b to each other. 3, when the main surfaces of the stopper main bodies 31a, 31b and the connecting belt 50 are placed on the same plane, the stopper member 30 has a connecting direction X1 that coincides with the extension direction of the connecting belt 50 and a width direction Y1 that is perpendicular to the connecting direction X1. The connecting direction X1 corresponds to the first direction X of the vibration-damping device 1, and the width direction Y1 corresponds to the second direction Y of the vibration-damping device 1.

[0023] The pair of stopper main bodies 31a, 31b have the same configuration except for the differences in the shapes and dimensions of each part. Unless otherwise specified, the following description will mainly focus on one stopper main body 31a, but the description can also be applied to the other stopper main body 31b as appropriate.

[0024] 1 and 2, the stopper main body 31a is a plate-like member that can come into contact with both side surfaces 11s, 11s of the fixed base 11, and has an inner surface that faces the side surfaces 11s in the vibration-damping device 1, and an outer surface opposite the inner surface. The inner surface of the stopper main body 31a is a smooth surface. FIG. 3(a) shows the outer surfaces of the stopper main bodies 31a and 31b. The stopper main body 31a includes an annular locking ring portion 36 having a locking opening 35 and a bracket abutment portion 32 extending outward from the locking ring portion 36. The bracket abutment portion 32 is adjacent to the locking ring portion 36 in the width direction Y1 and includes an intermediate plate portion 33 extending in a generally fan-shaped manner from a portion of the periphery of the locking ring portion 36 and an offset portion 34 extending outward in the width direction Y from the intermediate plate portion 33. In this embodiment, the stopper member 30 has an outer surface protrusion 32b formed on the outer surface of the intermediate plate portion 33. The outer surface protrusion 32b is a generally rectangular protrusion extending outward in the width direction Y1 from the periphery of the locking ring portion 36 in the bracket abutment portion 32. By providing the outer surface convex portion 32b, the stopper main bodies 31a and 31b are less likely to be deformed, and the inner cylindrical member 2 can be more effectively prevented from falling off from the engagement opening .

[0025] In this embodiment, the bracket abutment portion 32 has an offset portion 34 extending outward from the intermediate plate portion 33. The offset portion 34 protrudes outward in the width direction Y1 from the substantially fan-shaped intermediate plate portion 33. The offset portion 34 is a plate-shaped portion of the bracket abutment portion 32 whose inner surface faces the side surface 11s of the fixed base portion 11 (see FIGS. 1 and 2). More specifically, in the vibration-damping device 1, at least a portion of the offset portion 34 faces both side surfaces 11s, 11s of the fixed base portion 11. The offset portion 34 of this embodiment has a rectangular upper offset portion 34b that projects upward from the upper edge of the fixed base portion 11 (see FIG. 1). A connecting belt 50, which will be described later, extends from the upper offset portion 34b in the connecting direction X1. Alternatively, the connecting belt 50 may extend from a portion of the offset portion 34 that faces the side surface 11s of the fixed base portion 11 or from the intermediate plate portion 33.

[0026] The stopper member 30 has a belt-like connecting belt 50 extending from either or both of the pair of stopper main body portions 31 a, 31 b. The connecting belt 50 has an inner surface facing the surface of the fixed base portion 11 of the vibration-damping device 1 that is along the first direction X, and an outer surface opposite to the inner surface. 3(a), the stopper member 30 of this embodiment has connecting belts 50a, 50b extending from the offset portions 34 of both of the pair of stopper main body portions 31a, 31b. These connecting belts 50a, 50b have connecting means 51 for connecting the pair of stopper main body portions 31a, 31b to each other.

[0027] The connecting means 51 of this embodiment includes a locking portion 52 provided at the tip of each connecting belt 50a, 50b of the pair of stopper main bodies 31a, 31b, and a locked portion 56 to which the locking portion 52 can be locked. The locking portion 52 of this embodiment includes a large piece 53 located at the tip of the connecting belt 50a extending from one stopper main body 31a, and a locking protrusion 53a protruding from the outer surface of the large piece 53. The locked portion 56 of this embodiment includes a large piece 57 located at the tip of the connecting belt 50b extending from the other stopper main body 31b, and an insertion hole 57a into which the locking protrusion 53a is inserted. In both connecting belts 50a, 50b, the large piece portions 53, 57 have a larger area than the large piece portions 53, 57 on the stopper main body 31a, 31b side in the connecting direction X1, and are square in shape. The locking portion 52 and the locked portion 56 of this embodiment can be locked by overlapping the large pieces 53, 57 with each other and inserting and fitting the locking protrusion 53a into the insertion hole 57a (see FIG. 3(b)).

[0028] To maintain the locked state more stably, it is preferable that the outer diameter of the protruding tip of the locking protrusion 53a is larger than the outer diameter of the base end of the locking protrusion 53a and larger than the inner diameter of the insertion hole 57a (see FIG. 3(b)). This makes it difficult for the locking protrusion 53a to come out of the insertion hole 57a. In this way, by connecting the connecting belts 50a and 50b to each other by the connecting means 51, the pair of stopper main bodies 31a and 31b are configured to be connectable to each other via the connecting belts 50a and 50b.

[0029] Before the stopper member 30 is attached to the vibration-damping device 1, the pair of stopper main bodies 31a, 31b are in an unconnected state, and the pair of stopper main bodies 31a, 31b are separate, individual members. In other words, the pair of stopper main bodies 31a, 31b are not integrally molded products made up of one part connected via the connecting belt 50, but at least the stopper main bodies 31a, 31b are made up of two or more separate parts.

[0030] The stopper member 30 is attached to the first bracket 10 and the vibration-damping main body 5 by the following method. First, the vibration-damping main body 5 is inserted and fitted into the mounting hole 12 of the fixed base portion 11, and the vibration-damping main body 5 is attached to the first bracket 10. Next, the connecting belts 50a, 50b extending from the pair of stopper main body portions 31a, 31b are bent into an L shape at the boundary with the stopper main body portions 31a, 31b, and the protruding end portions 2e, 2e of the inner cylindrical member 2 are inserted through the engagement openings 35 of each of the stopper main body portions 31a, 31b. The diameter of this engagement opening 35 (the inner diameter of the engagement ring portion 36) corresponds to the outer diameter of the protruding end portion 2e, and the inner peripheral surface of the engagement ring portion 36 which forms the open end of the engagement opening 35 is in close contact with the outer peripheral surface of the protruding end portion 2e. As a result, the engagement openings 35 of the stopper main bodies 31a, 31b are engaged with the protruding end 2e of the inner cylindrical member 2, and the pair of stopper main bodies 31a, 31b are arranged on both sides in the first direction X with the fixed base 11 in between. In this state, the inner surface of the bracket abutment portion 32 faces the side surfaces 11s, 11s of the fixed base 11. Next, the connecting belts 50a, 50b of the pair of stopper main bodies 31a, 31b are connected to each other by the connecting means 51, bringing the pair of stopper main bodies 31a, 31b into a connected state. The connected connecting belts 50a, 50b are located on the outer surface of the fixed base 11, as shown in FIGS. 1 and 2.

[0031] After attaching the stopper main bodies 31a and 31b to the inner cylindrical member 2, the protruding ends 2e and 2e of the inner cylindrical member 2 are inserted into the insertion holes 21a of the pair of opposing pieces 21 and the second bracket 20 is fixed to the inner cylindrical member 2 with fastening means such as bolts, thereby attaching the second bracket 20 to the vibration-damping main body 5. As a result, the bracket abutment portions 32 of the stopper main bodies 31a and 31b are interposed between the pair of opposing pieces 21 and the side surface 11s of the fixed base portion 11. The interposition of the stopper main bodies 31a and 31b between the opposing pieces 21 and the first bracket 10 in the first direction X prevents contact between the first bracket 10 and the second bracket 20 (opposing pieces 21). In this manner, the vibration-damping device 1 to which the stopper member 30 is attached is obtained.

[0032] Before the stopper member 30 is attached to the vibration-damping device 1, the pair of stopper main bodies 31a, 31b are separate members. This allows one of the pair of stopper main bodies 31a, 31b to be formed from a different rubber material. In other words, the type of rubber material of the stopper main bodies 31a, 31b can be made different, and the vibration-damping performance, such as rubber hardness, can be made different on both sides of the vibration-damping main body 5 and the fixed base part 11 in the first direction X. This is effective in that vibration-damping control for vibrations input in the first direction X can be performed with high precision.

[0033] Furthermore, when attaching the pair of stopper main bodies 31a, 31b to the vibration-damping device 1, the pair of stopper main bodies 31a, 31b are connected via a connecting belt 50 having connecting means 51. The connected state of the stopper main bodies 31a, 31b makes it difficult for them to move outward in the first direction X, thereby preventing them from falling off the protruding ends 2e, 2e of the inner tube member 2. This is particularly effective at a stage before attaching the second bracket 20. Therefore, the stopper member 30 of this embodiment can stabilize the attachment state of the pair of stopper main bodies 31a, 31b to the inner tube member 2.

[0034] The stopper member 30 of this embodiment can be more stably positioned on both side surfaces 11s, 11s of the fixed base portion 11 because the connecting belts 50a, 50b in a connected state are positioned on the outer surface of the fixed base portion 11. More specifically, because the connecting belts 50 are hooked onto the outer surface of the fixed base portion 11 along the first direction X, detachment of the stopper main body portions 31a, 31b from the inner cylindrical member 2 can be further suppressed without any additional joining means such as adhesive. In this case, the pair of stopper main body portions 31a, 31b are not joined to the vibration-damping main body 5 and the first bracket 10 via an adhesive. Not requiring an adhesive is effective from the standpoint of reducing manufacturing costs.

[0035] In the stopper member 30 of this embodiment, the pair of stopper main bodies 31a, 31b are separably connected via the connecting belts 50a, 50b by the engagement between the aforementioned locking portion 52 and the locked portion 56. In other words, by releasing the engagement between the locking portion 52 and the locked portion 56, the pair of stopper main bodies 31a, 31b can be unconnected again. After the second bracket 20 is attached to the inner cylindrical member 2, the connecting belt 50 may be in a non-connected state.

[0036] From the viewpoint of more stabilizing the attachment state to the inner tube member 2, the connecting belt 50 is preferably provided integrally with one or both of the pair of stopper main bodies 31a, 31b. In this case, the connecting belt 50 is integrally molded from the same rubber material as the stopper main bodies 31a, 31b, and therefore has rubber elasticity. Since such connecting belt 50 is connected in a state of tension in the first direction X, it is possible to further suppress outward movement of the stopper main bodies 31a, 31b in the first direction X. Furthermore, the elastic deformation of the connecting belt 50 simplifies the operation of engaging the locking portion 52 with the locked portion 56, thereby improving the efficiency of the connecting operation. From the viewpoint of more efficient connecting operation, it is preferable that the connecting belt 50 be thinner than the stopper main bodies 31a, 31b.

[0037] 4 to 7 show another embodiment of the stopper member 30 according to the present invention. In this embodiment, components that differ from the embodiment shown in Figures 1 to 3 will be mainly described, and similar components will be given the same reference numerals and will not be described again. For components that are not particularly described, the description of the embodiment shown in Figures 1 to 3 will be applied as appropriate.

[0038] The stopper member 30a shown in FIG. 4 has the same configuration as the stopper member 30 shown in FIG. 3, except that the shapes of the locking portion 52 and the locked portion 56 are different. In the stopper member 30a shown in Figure 4, the connecting belt 50a extending from one stopper main body 31a has a long width piece 54 that is long in the width direction Y1 as the locking portion 52. The long width piece 54 forms a T-shape at the tip of the connecting belt 50a (see Figure 4(a)). The connecting belt 50b extending from the other stopper main body 31b has a large piece 57 with a T-shaped insertion hole 57b formed therein as the locked portion 56. The T-shaped insertion hole 57b has a long portion in the width direction Y1 on the side of the stopper main body 31b in the connecting direction X1, and the long portion in the width direction Y1 is shorter in length in the width direction Y1 than the long width piece 54. In this embodiment, the locking portion 52 and the locked portion 56 can be locked by inserting the wide piece portion 54 into the T-shaped insertion hole 57b and causing both ends of the wide piece portion 54 in the width direction Y1 to extend outward in the width direction Y1 from the T-shaped insertion hole 57b (see Figures 4(a) and (b)).

[0039] The stopper member 30b shown in FIG. 5 does not have large or wide pieces at the tip portions of the connecting belts 50a, 50b, and these belts 50a, 50b have a constant width over the entire length in the connecting direction X1. The stopper main body 31b of this embodiment contains adhesive 55 as the connecting means 51. More specifically, one stopper main body 31a shown in FIG. 5 has adhesive 55 applied to the tip portion of the outer surface of the connecting belt 50a (see FIGS. 5(a) and 5(b)). Furthermore, the connecting belt 50b extending from the other stopper main body 31b has an inner surface protrusion 58 protruding from the inner surface at the tip portion. In the stopper member 30b of this embodiment, the outer surface of the tip of the connecting belt 50a on which the adhesive 55 is applied faces the inner surface of the tip of the connecting belt 50b on which the inner surface convex portion 58 is formed, and these tip portions are overlapped and joined via the adhesive 55 (see FIGS. 5(a) and 5(b)). Since the adhesive 55 is also applied to the inner surface convex portion 58, the bonding area is increased, and the bonding strength can be improved.

[0040] 6, one stopper body 31a has a connecting belt 50a, while the other stopper body 31b does not have a connecting belt. In this way, when only one of the pair of stopper bodies 31a, 31b has the connecting belt 50, one of the locking portion 52 and the locked portion 56 of the connection means 51 can be provided on the connecting belt 50, and the other of the locking portion 52 and the locked portion 56 can be provided on the stopper body 31b that does not have the connecting belt 50. In this embodiment, the connecting belt 50 is provided with a locking portion 52, and the stopper body portion 31b that does not have the connecting belt 50 is provided with a locked portion 56.

[0041] One stopper body 31a shown in Figure 6 has a triangular wide piece 54a, as the engaging portion 52, at the tip of the connecting belt 50a. The length in the width direction Y1 gradually decreases toward the tip. The triangular wide piece 54a gives the tip of the connecting belt 50a an arrow-like shape (see Figure 6(a)). The other stopper body 31b has a wide insertion hole 59, as the engaged portion 56, in the upper offset portion 34b. The wide insertion hole 59 penetrates the upper offset portion 34b in the thickness direction of the stopper body 31b. In this embodiment, the locking portion 52 and the locked portion 56 can be locked by inserting the triangular long piece 54a into the wide insertion hole 59 and causing the widest portion of the triangular long piece 54a to extend outward in the width direction Y1 from the wide insertion hole 59 (see Figures 6(a) and (b)).

[0042] As with the embodiment shown in Figure 6, the stopper member 30d shown in Figure 7 has a connecting belt 50a only on one of the stopper main body parts 31a, and further has an engaging part 52 at the tip of the connecting belt 50a, and an engaged part 56 on the other stopper main body part 31b. One stopper body 31a shown in FIG. 7 has a long piece 54 as the engaging portion 52 at the tip of the connecting belt 50a. This connecting belt 50a has a constricted portion 54b that is narrower than the surrounding area and is closer to the stopper body 31a than the long piece 54 (see FIG. 6(a)). The other stopper body 31b has a wide insertion hole 59 and a short cutout hole 59a that is continuous with the periphery of the upper offset portion 34b as the engaged portion 56 in the upper offset portion 34b. The short cutout hole 59a is shorter in length in the width direction Y1 than the wide insertion hole 59 and is adjacent to the wide insertion hole 59 in the connecting direction X1. The long piece 54 is longer in length in the width direction Y1 than the wide insertion hole 59. In this embodiment, the locking portion 52 and the locked portion 56 can be locked by inserting the long piece 54 into the wide insertion hole 59 and causing both ends of the long piece 54 to extend outward in the width direction Y1 from the wide insertion hole 59 (see FIGS. 7(a) and 7(b)). When inserting the long piece 54 into the wide insertion hole 59, the narrowed portion 54b can be inserted into the notched short hole 59a, making the locking operation easier.

[0043] The vibration-damping device 1 and stopper member 30 of the present invention have been described above based on their preferred embodiments, but the present invention is not limited to the above-described embodiments and can be modified as appropriate. In addition, the above-described embodiments may be combined. For example, in the above-described embodiment, the locking protrusion 53 a protrudes from the outer surface of the large piece 53 , but the locking protrusion 53 a may protrude from the inner surface of the large piece 53 . Furthermore, the connecting belt 50 provided with the locking portion 52 or the locked portion 56 may not have the large piece portion 53 and may have a constant width over the entire length in the connecting direction X1. Furthermore, the connecting belt 50 may be a separate member from the stopper main bodies 31a and 31b to which it extends. [Explanation of symbols]

[0044] 1. Vibration isolation device 2. Inner cylinder member 2e Protruding end 3. Outer cylinder member 3f Outer cylinder opening end face 4. Rubber elastic body 5 Anti-vibration unit 10 First Bracket 11 Fixed base part 12 Mounting hole 15,16 Flange 20 Second Bracket 21 Opposing piece 21a Insertion hole 23 Fixed plate part 30, 30a, 30b, 30c, 30d Stopper members 31a, 31b Stopper body 33 Intermediate plate 32 Bracket contact part 34 Offset section 34b Upper offset part 35 Attachment opening 36 Attachment ring part 50, 50a, 50b Connecting belt 51 Connection Method 52 Locking portion 53,57 Okatabe 53a Locking protrusion 54 Width long piece 54a Triangular wide long piece 54b Neck 55 Adhesive 56 Locked part 57a Insertion hole 57b T-shaped insertion hole 58 Inner convex part 59 Wide insertion hole 59a short hole X 1st direction Y Second direction Z 3rd direction X1 Connection direction Y1 width direction

Claims

1. A vibration-damping device comprising an inner cylindrical member, a vibration-damping body having a rubber elastic body arranged around the outer periphery of the inner cylindrical member, a first bracket into which the vibration-damping body is inserted, and a second bracket fixed to the inner cylindrical member, the device being attached between a vibration generating part and a vibration receiving part, the first bracket is attached to one of the vibration generating unit and the vibration receiving unit, and the second bracket is attached to the other of the vibration generating unit and the vibration receiving unit, an outer peripheral surface of the vibration-isolating body is fixed to a fixed base portion of the first bracket, the second bracket has a U-shaped portion having a pair of opposing pieces extending parallel to each other from a fixed platen portion, and both protruding end portions extending from the side surfaces of the fixed base portion are fixed to the pair of opposing pieces, a stopper member having a pair of stopper main bodies is attached between the pair of opposing pieces and both side surfaces of the fixed base part in a state in which engagement openings formed in the stopper main bodies are engaged with the protruding end portions on both sides of the inner cylindrical member, The pair of stopper body portions are connected to each other via a connecting belt having a connecting means extending from either one or both of the stopper body portions.

2. 2. The vibration-damping device according to claim 1, wherein one and the other of the pair of stopper main bodies are formed from different rubber materials.

3. The connecting belt is located on the outer surface of the fixed base portion, The vibration-damping device according to claim 1 or 2, wherein the pair of stopper body portions are not joined to the vibration-damping body and the first bracket via an adhesive.

4. The vibration-damping device according to claim 1 or 2, wherein the pair of stopper main bodies are separably connected via the connecting belt.

5. Each of the pair of stopper main bodies has the connecting belt, 5. The vibration-damping device according to claim 4, wherein the connecting means includes a latched portion and a latching portion capable of being latched onto the latched portion, the latched portion being provided at the tip end of the connecting belt of each of the pair of stopper main bodies.

6. One of the pair of stopper main body portions has the connecting belt, 5. The vibration-damping device according to claim 4, wherein the connecting means includes a locked portion provided on the other of the stopper body portions and a locking portion provided on the leading end of the connecting belt.

7. Each of the pair of stopper main bodies has the connecting belt, 3. The vibration-damping device according to claim 1, wherein the connecting means includes an adhesive applied to a tip of the connecting belt of one of the stopper body portions.

8. A stopper member used in a vibration isolation device, The vibration-damping device includes an inner cylindrical member, a vibration-damping main body having a rubber elastic body arranged around the outer periphery of the inner cylindrical member, a first bracket into which the vibration-damping main body is inserted, and a second bracket fixed to the inner cylindrical member, and is attached between a vibration generating part and a vibration receiving part, the first bracket is attached to one of the vibration generating unit and the vibration receiving unit, and the second bracket is attached to the other of the vibration generating unit and the vibration receiving unit, an outer peripheral surface of the vibration-isolating body is fixed to a fixed base portion of the first bracket, the second bracket has a U-shaped portion having a pair of opposing pieces extending parallel to each other from a fixed platen portion, and both protruding end portions extending from the side surfaces of the fixed base portion are fixed to the pair of opposing pieces, The stopper member has a pair of stopper main bodies, Each of the pair of stopper main body portions includes an engagement ring portion having an engagement opening that is engaged with the protruding end portion of the inner cylindrical member of the vibration-damping main body, and a bracket abutment portion that projects outward from the engagement ring portion and is disposed between a side surface of the fixed base portion and the opposing piece, The pair of stopper body portions are connectable to each other via a connecting belt that extends from one or both of the pair of stopper body portions and has connecting means.

9. The stopper member according to claim 8 , wherein one and the other of the pair of stopper main bodies are formed from different rubber materials.

10. The stopper member according to claim 8 or 9, wherein the connecting belt is provided integrally with one or both of the pair of stopper body portions.

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