Stopper member, Anti-vibration device, and method for manufacturing Anti-vibration device

Abstract

To improve productivity of a vibration control device.SOLUTION: The stopper member 3 is a cap-shaped member that is interposed between the first bracket 11 and the vibration damping member 2 and covers the distal end portion 21 of the vibration damping member 2 so as to elastically suppress displacement between the vibration damping member 2, which is attached to one of the vibration source 101 and the vibration damping target portion 102 via the first bracket 11, and the first bracket 11. The stopper member 3 includes a bottom part 31 having an insertion port 31a into which the tip part 21 is inserted, a plate-shaped part 37 extended to the outside of the first bracket 11 and allowing bending deformation in a direction away from the insertion port 31a, and a connecting part 38 for connecting the plate-shaped part 37 to a peripheral edge part 31a of the insertion port 31b. The coupling portion 38 is configured to expand the insertion port 31a as the plate-shaped portion 37 is bent and deformed.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a stopper member, a vibration-isolating device, and a method for manufacturing a vibration-isolating device. [Background technology]

[0002] For example, a vibration-damping device is disclosed in Patent Document 1. Specifically, the vibration-damping device disclosed in this document includes a first mounting member, a second mounting member, a rubber elastic body that elastically connects the first and second mounting members, and an elastic stopper member (hereinafter simply referred to as the "stopper member").

[0003] Here, the first mounting member has a cylindrical member. An inner bracket is fitted into the cylindrical member. The vibration-damping device is attached to one of the vibration generating part or the vibration receiving part via the inner bracket. On the other hand, an outer bracket having a cylindrical part is attached to the second mounting member. The vibration-damping device is attached to the other of the vibration generating part or the vibration receiving part via the outer bracket.

[0004] The stopper member disclosed in Patent Document 1 is interposed between the cylindrical member and the outer bracket and is configured to limit the amount of displacement of the first mounting member relative to the outer bracket. This stopper member has an insertion hole for inserting the cylindrical member and a plate-like protruding portion (hereinafter simply referred to as the "plate-like portion") protruding from a side surface different from the opening surface of the insertion hole. In addition, a groove extending in the width direction of the opening is formed on the underside of the plate-like portion of the stopper member.

[0005] According to Patent Document 1, when assembling the vibration-damping device, first, the stopper member is attached to the cylindrical member by inserting the cylindrical member through the communication hole of the stopper member.

[0006] The cylindrical member with the stopper member attached is then assembled to the outer bracket (hereinafter simply referred to as the "first bracket"). This assembly is performed by press-fitting the cylindrical member with the stopper member attached into the cylindrical portion of the first bracket. At this time, the stopper member is folded at approximately a right angle around the base of its plate-like portion. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-209942 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the configuration disclosed in Patent Document 1, when the cylindrical member is press-fitted into the first bracket, the plate-like portion folded at a right angle needs to pass through the cylindrical portion of the first bracket. In this case, since the plate-like portion needs to be maintained in a folded state throughout the press-fitting process, there is room for improvement in the productivity of the vibration-damping device. Furthermore, to enable smooth passage through the cylindrical portion, the stopper member is subject to constraints on its external shape.

[0009] The present disclosure has been made in consideration of the above points, and its purpose is to improve the productivity of vibration-damping devices while maintaining the degree of freedom in designing the stopper member. [Means for solving the problem]

[0010] A first aspect of the present disclosure relates to a stopper member that is interposed between a first bracket and a vibration-damping member attached to one of a vibration source and a vibration-damping target via the first bracket, and that covers the tip of the vibration-damping member so as to elastically suppress displacement between the first bracket and the vibration-damping member.

[0011] According to the first aspect, the stopper member comprises a bottom portion having an insertion opening into which the tip portion is inserted, a plate-shaped portion that extends outside the first bracket and allows bending deformation in a direction away from the insertion opening, and a connecting portion that connects the plate-shaped portion to the peripheral portion of the insertion opening, and the connecting portion is configured to expand the insertion opening as the plate-shaped portion bends and deforms.

[0012] The inventors of the present application considered a process in which, instead of attaching the stopper member to the elastic member beforehand, the stopper member is attached to the first bracket beforehand, and then the stopper member is placed over the elastic member together with the first bracket. However, it is not necessarily easy to simultaneously perform the process of press-fitting the elastic member into the first bracket and the process of placing the stopper member over the elastic member.

[0013] According to the first aspect, the plate-like portion of the stopper member is adapted to be extended outside the first bracket, so that even if the stopper member is attached to the first bracket prior to the insertion (press-fitting) of the vibration-damping member, the plate-like portion extended from the first bracket can be bent and deformed.

[0014] By bending and deforming the plate-like portion, the insertion opening for the stopper member can be enlarged as in the first embodiment. Enlarging the insertion opening contributes to smooth insertion of the tip of the vibration-proof member.

[0015] Therefore, even if the stopper member is attached to the first bracket beforehand, it is possible to simultaneously attach or insert both the first bracket and the stopper member into the vibration-damping member, thereby improving the productivity of the vibration-damping device.

[0016] Furthermore, there is no need to pass the stopper member through the insertion opening of the first bracket during the press-fitting process, so the stopper member can be shaped to meet the required spring characteristics, durability, etc., without sacrificing design freedom.

[0017] Furthermore, according to a second aspect of the present disclosure, the connecting portion may be formed by a plurality of ribs arranged along the peripheral edge portion, and the plurality of ribs may be arranged at intervals in a circumferential direction extending along the peripheral edge portion.

[0018] According to the second aspect, the connecting portion connecting the plate-shaped portion and the periphery of the insertion opening is formed by a plurality of ribs arranged at intervals from one another. By using these ribs, each portion along the periphery of the insertion opening can be enlarged as evenly as possible. This is advantageous for smooth insertion of the vibration-damping member and, ultimately, for improving the productivity of the vibration-damping device.

[0019] Furthermore, according to a third aspect of the present disclosure, when the bottom portion is viewed from the front, the dimension of each of the multiple ribs in the longitudinal direction extending from the plate-shaped portion toward the peripheral portion may be longer than the dimension in the thickness direction along the circumferential direction.

[0020] According to the third aspect, each rib is formed thin in front view so as to extend from the plate-like portion toward the peripheral edge portion, thereby minimizing the increase in weight and manufacturing costs that would otherwise be caused by the addition of multiple ribs.

[0021] Furthermore, according to a fourth aspect of the present disclosure, the plate-shaped portion may be provided with a cutout portion separated from the insertion opening, and the cutout portion may be arranged between the plurality of ribs.

[0022] According to the fourth aspect, by providing a hollow portion on the plate-shaped portion, the force pressing on the wall surface of the stopper member is reduced, and when the plate-shaped portion bends and deforms, the starting point of the bending is displaced toward the tip of the plate-shaped portion. Therefore, it is possible to suppress the contraction of the wall surface of the stopper member without sacrificing the force that expands the insertion opening. This is advantageous for realizing smooth insertion of the vibration-damping member.

[0023] According to a fifth aspect of the present disclosure, the plurality of ribs may be arranged on both the front and rear surfaces of the plate-shaped portion.

[0024] According to the fifth aspect, by arranging multiple ribs on both the front and back sides of the plate-shaped portion, the insertion opening can be enlarged more than in a configuration in which ribs are arranged on only one side, which is advantageous in realizing smooth insertion of the vibration-damping member.

[0025] Furthermore, according to a sixth aspect of the present disclosure, the vibration-damping member may be attached to the other of the vibration source and the vibration-damping target via a second bracket, the tip end having an opening that opens in a direction different from the insertion opening and is penetrated by the second bracket, the stopper member each having an insertion hole that is penetrated by the second bracket as well as the opening, and comprising first and second side portions that sandwich the tip end from both sides in a predetermined direction, the plate-shaped portion being interposed between the first bracket and the second bracket, and comprising a first plate-shaped portion extending from a peripheral portion of the insertion hole in the first side portion, and a second plate-shaped portion extending from a peripheral portion of the insertion hole in the second side portion, and the connecting portion being comprised of a first connecting portion that connects the first plate-shaped portion to the peripheral portion of the insertion opening, and a second connecting portion that connects the second plate-shaped portion to the peripheral portion of the insertion opening.

[0026] In a conventional process, a stopper member is attached to the tip of the vibration-isolating member, and then the vibration-isolating member together with the stopper member is inserted into the first bracket. Instead of this process, the inventors of the present application considered a process in which, after inserting the vibration-isolating member into the first bracket, a stopper member is further inserted into the first bracket.

[0027] However, when such a process is adopted, the vibration-isolating member prevents the stopper member from being inserted, and therefore the plate-like portion can only be provided on one side of the stopper member.

[0028] On the other hand, the second bracket as in the sixth aspect is designed to fix the stopper member by clamping the area near the plate-like portion, so the second bracket can only fix the stopper member from one side, which is inconvenient for properly fixing the stopper member.

[0029] Furthermore, the load that the second bracket exerts on the stopper member is biased toward the side surface on one side where the plate-like portion is provided, which could result in the plate-like portion and therefore the stopper member being torn off or falling off.

[0030] On the other hand, it becomes easier to insert the vibration-isolating member into the first bracket to which the stopper member is attached, and therefore it becomes possible to provide plate-like portions on both sides of the stopper member, and to adopt a configuration in which both of the two side portions of the stopper member are fixed by the second bracket.

[0031] In this case, the second bracket can secure the stopper member from both sides, which is advantageous for properly securing the stopper member. Also, the load that the second bracket exerts on the stopper member is distributed in a balanced manner to both sides where the plate-like portion is provided, which is advantageous for preventing the plate-like portion and, in turn, the stopper member from being torn off or falling off.

[0032] Furthermore, according to a seventh aspect of the present disclosure, the stopper member may have third and fourth side portions that connect the first and second side portions, respectively, and sandwich the tip portion from both sides in a direction different from the predetermined direction, and the third and fourth side portions may each have a protrusion portion that partially thickens the third and fourth side portions.

[0033] According to the seventh aspect, the third and fourth side surface portions are provided with protrusions that thicken them, which makes it possible to suppress deformation of the third and fourth side surface portions in unintended directions (for example, deformation toward the central axis of the vibration-damping member) when the plate-like portion is bent and deformed, and to suppress narrowing of the insertion opening due to such deformation.

[0034] An eighth aspect of the present disclosure relates to an anti-vibration device comprising: an anti-vibration member attached via a first bracket to one of a vibration source and an object to be anti-vibration; and a stopper member interposed between the first bracket and the anti-vibration member and covering the tip of the anti-vibration member so as to elastically suppress displacement between the anti-vibration member and the first bracket.

[0035] According to the eighth aspect, the stopper member comprises a bottom portion having an insertion opening into which the tip portion is inserted, a plate-shaped portion that extends outside the first bracket and allows bending deformation in a direction away from the insertion opening, and a connecting portion that connects the plate-shaped portion to the peripheral portion of the insertion opening, and the connecting portion is configured to expand the insertion opening as the plate-shaped portion bends and deforms.

[0036] According to the eighth aspect, it is possible to improve the productivity of the vibration isolation device while maintaining the degree of freedom in designing the vibration isolation device.

[0037] A ninth aspect of the present disclosure relates to a method for manufacturing the vibration isolation device.

[0038] According to the ninth aspect, the manufacturing method includes attaching the stopper member to the first bracket, and press-fitting the vibration-damping member into the first bracket to which the stopper member is attached through the insertion opening.

[0039] According to the ninth aspect, it is possible to improve the productivity of the vibration isolation device while maintaining the degree of freedom in designing the vibration isolation device. [Effects of the Invention]

[0040] As described above, according to the present disclosure, it is possible to improve the productivity of vibration isolation devices while maintaining the degree of freedom in designing the vibration isolation device. [Brief explanation of the drawings]

[0041] [Figure 1] FIG. 1 is a perspective view illustrating the configuration of an anti-vibration device. [Figure 2]FIG. 2 is a vertical cross-sectional view illustrating the configuration of the vibration isolation device. [Figure 3] FIG. 3 is a perspective view illustrating an example of a vibration-isolating member. [Figure 4] FIG. 4 is a perspective view illustrating the first bracket. [Figure 5] FIG. 5 is a perspective view illustrating the second bracket. [Figure 6] FIG. 6 is a perspective view illustrating the stopper member. [Figure 7] FIG. 7 is a perspective view illustrating a connecting portion of the stopper member. [Figure 8] FIG. 8 is a front view for explaining bending deformation of the plate-like portion. [Figure 9] FIG. 9 is a bottom view for explaining deformation of the insertion opening due to bending deformation of the plate-like portion. [Figure 10] FIG. 10 is a diagram for explaining a method for manufacturing the vibration isolation device. [Figure 11] FIG. 11 is a view corresponding to FIG. 9, showing a stopper member according to the second embodiment. [Figure 12] FIG. 12 is a view corresponding to FIG. 9, showing a stopper member according to the third embodiment. [Figure 13] FIG. 13 is a view corresponding to FIG. 9, showing a stopper member according to the fourth embodiment. [Figure 14A] FIG. 14A is a view corresponding to FIG. 9, showing a stopper member according to the fifth embodiment. [Figure 14B] FIG. 14B is a perspective view showing a stopper member according to the fifth embodiment. [Figure 15A] FIG. 15A is a view corresponding to FIG. 9, showing a stopper member according to a sixth embodiment. [Figure 15B] FIG. 15B is a plan view showing the stopper member according to the sixth embodiment. [Figure 16A] FIG. 16A is a view corresponding to FIG. 9, showing a stopper member according to the seventh embodiment. [Figure 16B] FIG. 16B is a perspective view showing a stopper member according to the seventh embodiment. [Figure 17]FIG. 17 is a view corresponding to FIG. 9 and shows a comparative example of the stopper member. [Figure 18] FIG. 18 is a bottom view for explaining the expansion amount and insertion amount of the stopper member according to the first embodiment. [Figure 19] FIG. 19 is a table showing the expansion amount and insertion amount of the insertion opening when the plate-like portions of the stopper members according to the first to seventh embodiments and the comparative example are bent and deformed. DETAILED DESCRIPTION OF THE INVENTION

[0042] Hereinafter, embodiments of the present disclosure will be described in detail. Note that the following description is an example.

[0043] <Configuration of vibration isolation device 1> Fig. 1 is a perspective view illustrating the configuration of an anti-vibration device 1. Fig. 2 is a vertical cross-sectional view illustrating the configuration of an anti-vibration device 1. This anti-vibration device 1 is a device for suppressing transmission of vibration from a vibration source 101 to a target part (vibration receiving part) 102 to be anti-vibration-proofed.

[0044] As an example, the vibration isolation device 1 according to this embodiment is used as a device for mounting a power unit such as an automobile engine on a vehicle body. In this case, the vibration source 101 may be, for example, the automobile power unit. The target 102 to be isolated from vibration may be the vehicle body of the same automobile.

[0045] 1 and 2, the vibration isolation device 1 includes a vibration isolation member 2 and a stopper member 3. The vibration isolation device 1 is attached to one of a vibration source 101 and an object to be vibration-isolated 102 via a first bracket 11, and is attached to the other of the vibration source 101 and the object to be vibration-isolated 102 via a second bracket 12.

[0046] (Vibration-proof member 2) 3 is a diagram illustrating an example of a vibration-damping member 2. This vibration-damping member 2 is configured to be attached to one of a vibration source 101 and an object to be vibration-damped 102 (object to be vibration-damped 102 in the illustrated example) via a first bracket 11. The vibration-damping member 2 only needs to have an elastic portion 23, which will be described later. The vibration-damping member 2 includes a member having elasticity, or in other words, a general "elastic member."

[0047] Specifically, the vibration-damping member 2 has a substantially conical (or axial) shape with a central axis O extending along a predetermined direction. The vibration-damping member 2 has a tip portion 21, a cylindrical member 22, and an elastic portion (rubber elastic portion) 23 aligned along the central axis O.

[0048] An inner core member having an insertion portion is disposed inside the tip portion 21. The inner core member has rigidity. The inner core member is made of metal (particularly cast metal) such as iron or aluminum, or made of resin. The press-fit portion 12a of the second bracket 12 is inserted into the insertion portion, and fixes the inserted press-fit portion 12a. The inner core member is integrally bonded to the rubber elastic portion 23 by vulcanization bonding.

[0049] The tubular member 22 has rigidity. The elastic portion 23 elastically connects the tip portion 21 and the tubular member 22. At least a portion of the elastic portion 23 and the tip portion 21 is covered with a rubber elastic material. This rubber elastic material is, for example, a blend of one or more of natural rubber and diene-based synthetic rubber.

[0050] Hereinafter, the direction extending along the central axis O (the predetermined direction) will be referred to as the "vertical direction," one side of which will be referred to as "upper," and the other side will be referred to as "lower." In the example of FIG. 3, the tip portion 21 is disposed above the tubular member 22.

[0051] Similarly, among the directions perpendicular to the central axis O, the direction in which the second bracket 12 is inserted into the vibration-damping member 2 is referred to as the "left-right direction," and during that insertion, one side of the second bracket 12 that approaches the vibration-damping member 2 is referred to as the "right," and the other side is referred to as the "left." Similarly, the direction perpendicular to both the up-down direction and the front-to-back direction is referred to as the "front" and one side is referred to as the "front," and the other side is referred to as the "rear."

[0052] The definitions of "up-down direction," "front-rear direction," and "left-right direction" are merely for the sake of convenience in order to simplify the explanation. For example, the vibration isolation device 1 may be upside down when attached to the vehicle body.

[0053] Returning to the description of the vibration-proof member 2, the tubular member 22 has a cylindrical shape that extends in the vertical direction. The tubular member 22 has an outer circumferential surface that contacts the inner circumferential surface of the annular portion 11a shown in FIG.

[0054] Furthermore, the tip 21 of the vibration-proof member 2 has a hollow rectangular parallelepiped shape. In other words, the tip 21 can be considered as a box that faces in the up-down, left-right, and front-rear directions.

[0055] As shown in FIG. 2, the tip portion 21 is inserted into the inside of the first bracket 11 through an insertion opening 11e arranged on the lower side of the first bracket 11 and an insertion opening 31a of the stopper member 3, which will be described later.

[0056] The tip portion 21 inserted (press-fitted) into the first bracket 11 abuts against the first bracket 11 via the stopper member 3. This abutment causes the tip portion 21 to be attached to the vibration-damping target 102 via the first bracket 11.

[0057] The vibration-isolating member 2 is configured to be attached via a second bracket 12 to the other of the vibration source 101 and the vibration-isolating target 102 (the vibration source 101 in the illustrated example).

[0058] Specifically, the tip end 21 of the vibration-damping member 2 has a through hole 21a that opens in a different direction (left-right direction in the illustrated example) from the insertion opening 31a of the stopper member 3 (see FIG. 3). As illustrated in FIG. 2, this through hole 21a is configured to be penetrated by the second bracket 12. For example, the through hole 21a corresponds to the inserted portion of the inner core member described above, and this inserted portion may be penetrated by the second bracket 12.

[0059] 3, through hole 21a has a rectangular cross section (opening surface). The inserted portion (through hole 21a) is covered with, for example, the same rubber elastic material as elastic portion 23. Furthermore, a rib is provided on the inner surface of through hole 21a to reduce the contact area with the outer surface, from the viewpoint of press-fitting second bracket 12 and preventing it from slipping out.

[0060] The tip portion 21 through which the second bracket 12 is inserted is fastened to the vibration source 101 via the second bracket 12. By this fastening, the tip portion 21 is attached to the vibration source 101 via the second bracket 12.

[0061] (First bracket 11) Fig. 4 is a perspective view illustrating the first bracket 11. As shown in Fig. 2 and Fig. 4, the first bracket 11 has an annular portion 11a, an arch portion 11d, an open portion 11b, a receiving portion 11c, an insertion opening 11e, and a stay portion 11f.

[0062] As described above, the annular portion 11a has an annular shape that contacts the outer surface of the tubular member 22 of the vibration-damping member 2. The annular ring formed by the annular portion 11a has a central axis that is coaxial with the vibration-damping member 2. As shown in FIG. 2, the tubular member 22 of the vibration-damping member 2 is press-fitted into the annular portion 11a.

[0063] The arch portion 11d is connected to the outer surface of the annular portion 11a. The arch portion 11d functions as a stopper that suppresses excessive deformation of the elastic portion 23 of the vibration-damping member 2, and also as an arch that spans between members separated in the front-to-rear direction to increase the rigidity of the first bracket. Fastening holes for fastening the first bracket 11 to the vibration-damping target portion 102 are arranged on both the front and rear ends of the arch portion 11d.

[0064] The opening 11b is an opening that penetrates the first bracket 11 in the left-right direction. The opening 11b is open on both the left and right sides of the arch portion 11d and is formed to penetrate the arch portion 11d in the left-right direction. The stopper member 3 and the second bracket 12 are adapted to be inserted into the first bracket 11 through the opening 11b.

[0065] The receiving portion 11c, together with the arch portion 11d, constitutes the open portion 11b. Specifically, the receiving portion 11c has a plate shape that extends in the front-to-rear direction and protrudes to the left. In FIG. 4, the receiving portion 11c is fixed by welding to the annular portion 11a and the arch portion 11b. The receiving portion 11c acts as a stopper that limits excessive displacement when a load is applied in the downward direction of the vehicle through the second bracket 12. The receiving portion 11c constitutes the lower opening edge of the open portion 11b. The remaining opening edge of the open portion 11b is constituted by the arch portion 11d.

[0066] The insertion opening 11e opens on the lower surface of the arch portion 11d (shown only in FIG. 2). The tip portion 21 of the vibration-proof member 2 is inserted into the first bracket 11 through this insertion opening 11e.

[0067] The stay portion 11f is disposed at an angle from the annular portion 11a toward the upper left so as to cover a portion of the open portion 11b of the first bracket 11. The stay portion 11f is fixed by welding to the arch portion 11b. The stay portion 11f serves to stably fix the vibration isolation device 1 to the vibration source side or the vibration isolation target side, and also serves as a stopper that limits excessive displacement when a load is applied from the underside of the vehicle through the second bracket.

[0068] (Second bracket 12) Fig. 5 is a perspective view illustrating the second bracket 12. As shown in Fig. 2 and Fig. 5, the second bracket 12 has a press-fit portion 12a, a fastening portion 12b, and a spindle 12c.

[0069] The press-fit portion 12a has a rod shape that extends in the left-right direction and has a rectangular cross section. The press-fit portion 12a is inserted into the first bracket 11, to which the stopper member 3 is attached, via its open portion 11b. As shown in FIG. 2, after insertion, the press-fit portion 12a penetrates the first bracket 11 in the left-right direction.

[0070] 1 and 2, the fastening portion 12b is exposed to the outside of the first bracket 11 even when the vibration isolator 1 is assembled. The fastening portion 12b is attached to the vibration source 101 via a spindle 12c.

[0071] (Stopper member 3) Fig. 6 is a perspective view illustrating the stopper member 3. Fig. 7 is a perspective view illustrating the connecting portion 38 of the stopper member 3. Fig. 8 is a front view for explaining bending deformation of the first and second plate-shaped portions 371, 372 as the plate-shaped portion 37. Fig. 9 is a bottom view for explaining deformation of the insertion opening 31a due to bending deformation of the first and second plate-shaped portions 371, 372.

[0072] The stopper member 3 is a member that is disposed between the first bracket 11 and the vibration-isolating member 2 so as to elastically suppress displacement between the vibration-isolating member 2 and the first bracket 11.

[0073] The stopper member 3 is a member separate from the first bracket 11 and the vibration-isolating member 2, and is configured to function as a stopper that prevents the first bracket 11 and the vibration-isolating member 2 from coming into contact with each other.

[0074] The stopper member 3 is a cap-shaped member that covers the tip portion 21 of the vibration-damping member 2. The stopper member 3 may be made of, for example, synthetic rubber, or a portion of it may be made of a metal or resin material. In this embodiment, the entire stopper member 3 is made of an elastic material. The elastic material that makes up the stopper member 3 is, for example, a blend of one or more of natural rubber and diene-based synthetic rubber, or urethane foam.

[0075] The stopper member 3 has a hollow rectangular parallelepiped shape. In other words, the stopper member 3 can be regarded as a box that faces in the up-down, left-right, and front-rear directions.

[0076] Specifically, the stopper member 3 has a bottom portion 31 facing downward, a top portion 32 facing upward, and a first side portion 33, a second side portion 34, a third side portion 35 and a fourth side portion 36 facing in all four directions (front, back, left, right).

[0077] The six sides, namely the bottom 31, the top 32, the first side 33, the second side 34, the third side 35 and the fourth side 36, form an accommodation space S for the tip 21 of the vibration-damping member 2.

[0078] 7 and 9, the bottom 31 is a plate-like member facing downward. The bottom 31 has an insertion opening 31a into which the tip 21 of the vibration-damping member 2 is inserted. The insertion opening 31a has a rectangular shape. As shown in FIG. 2, the opening area of ​​the insertion opening 31a of the stopper member 3 is smaller than the opening area of ​​the insertion opening 11e of the first bracket 11.

[0079] In this embodiment, the opening of the insertion slot 31a extends over almost the entire area of ​​the bottom portion 31. The bottom portion 31 is cut out by the insertion slot 31a, except for a rectangular frame-shaped peripheral edge portion 31b to which the first side surface portion 33 to the fourth side surface portion 36 are connected.

[0080] 6 and 8, the top portion 32 is a plate-like member facing upward. As shown in Fig. 2, this top portion 32 is configured to abut against the upper end of the arch portion 11d of the first bracket 11 when the vibration isolator 1 is in an assembled state. To prevent abnormal noise from being generated by this abutment, the top portion 32 has a plurality of ridges 32a that protrude upward.

[0081] Each protrusion 32a extends in the same direction (left-right direction in the illustration) as the opening direction of the through-hole 21a of the vibration-damping member 2, the open portion 11b of the first bracket 11, and the first and second insertion holes 33a and 34a described below, i.e., along the insertion direction of the stopper member 3 into the first bracket 11. The multiple protrusions 32a are aligned in the front-rear direction, which is a direction perpendicular to the insertion direction.

[0082] As illustrated in Figures 6 to 9, the first side surface portion 33 is a plate-shaped member facing left, the second side surface portion 34 is a plate-shaped member facing right, the third side surface portion 35 is a plate-shaped member facing forward, and the fourth side surface portion 36 is a plate-shaped member facing rearward.

[0083] The first and second side surface portions 33, 34 sandwich the tip portion 21 of the vibration-damping member 2 from both sides in a predetermined direction (the left-right direction in the illustrated example). The third and fourth side surface portions 35, 36 sandwich the tip portion 21 of the vibration-damping member 2 from both sides in a direction different from the predetermined direction (the front-rear direction in the illustrated example).

[0084] Here, the first and second side surface portions 33, 34 respectively have insertion holes 33a, 34a that are passed through by the second bracket 12 as well as the through hole 21a of the vibration-proof member 2. Both of these insertion holes 33a, 34a have a rectangular shape.

[0085] Hereinafter, the insertion hole 33a of the first side surface portion 33 may be referred to as a "first insertion hole 33a," and the insertion hole 34a of the second side surface portion 34 may be referred to as a "second insertion hole 34a."

[0086] On the other hand, the third and fourth side surface portions 35, 36 have protruding portions 35a, 36a that partially thicken the third and fourth side surface portions 35, 36, respectively.

[0087] Each of the protrusions 35a, 36a extends in the same direction as each of the protrusions 32a of the top 32 (the left-right direction in the illustration), that is, along the insertion direction of the stopper member 3 into the first bracket 11. The multiple protrusions 35a, 36a are aligned in the up-down direction, which is a direction perpendicular to the insertion direction.

[0088] The stopper member 3 according to this embodiment has a plate-shaped portion 37 that extends outward from the first bracket 11 (see FIG. 2). This plate-shaped portion 37 is made of an elastic material, like the other portions of the stopper member 3, and is configured to allow bending deformation of the plate-shaped portion 37. The elastic material that makes up the plate-shaped portion 37 is, for example, a blend of one or more of natural rubber and diene-based synthetic rubber.

[0089] Note that bending deformation here refers to deformation of the plate-shaped portion 37 in a direction away from the bottom 31 of the stopper member 3 and, ultimately, from its insertion opening 31a (upward in the illustrated example), as can be seen from the comparison between the dotted line and the solid line in Figure 8.

[0090] More specifically, the plate-like portion 37 according to this embodiment is interposed between the first bracket 11 and the second bracket 12 so as to suppress interference between the first bracket 11 and the second bracket 12.

[0091] More specifically, the plate-shaped portion 37 includes a first plate-shaped portion 371 extending leftward from the first side surface portion 33, and a second plate-shaped portion 372 extending rightward from the second side surface portion 34. Both the first plate-shaped portion 371 and the second plate-shaped portion 372 are formed so that their dimensions (thickness) in the up-down direction are shorter than their dimensions in other directions.

[0092] More specifically, the first plate-shaped portion 371 extends from the peripheral edge 33b of the first insertion hole 33a, and the second plate-shaped portion 372 extends from the peripheral edge 34b of the second insertion hole 34a (see FIG. 8). The first plate-shaped portion 371 tapers in the front-rear direction as it moves away from the first side surface portion 33 to the left.

[0093] 6, a plurality of protrusions 37c are provided on the upper surface of the first plate-shaped portion 371. The plurality of protrusions 37c are aligned in the left-right direction. Each of the protrusions 37c extends in the front-rear direction. Although not shown in detail, a plurality of similarly formed protrusions are also provided on the upper surface of the second plate-shaped portion 372.

[0094] 8, the base ends 37b of the first and second plate-shaped portions 371, 372 are thinner than the respective tip ends 37a, which makes it easier for the first and second plate-shaped portions 371, 372 to bend and deform around the base ends 37b, and also makes it possible to increase the amount of deformation during the deformation.

[0095] 2 and FIG. 10 (described later), in the assembled state of the vibration-damping device 1, the first plate-shaped portion 371 is extended to the outside of the first bracket 11 through the open portion 11b of the first bracket 11. Similarly, the second plate-shaped portion 372 is extended to the outside of the first bracket 11 through the open portion 11b of the first bracket 11.

[0096] The stopper member 3 according to this embodiment includes a connecting portion 38 that connects the plate-like portion 37 to the peripheral edge portion 31b of the insertion opening 31a. The connecting portion 38 is configured to expand the insertion opening 31a as the plate-like portion 37 is bent and deformed.

[0097] In detail, the connecting portion 38 in this embodiment is positioned on the opposite side of the second bracket 12 (the lower side in the example shown) across the plate-shaped portion 37 so as to suppress interference between the connecting portion 38 and the second bracket 12.

[0098] More specifically, the connecting portion 38 includes a first connecting portion 381 and a second connecting portion 382. The first connecting portion 381 connects the first plate-shaped portion 371 to the peripheral edge 31b of the insertion opening 31a. The second connecting portion 382 connects the second plate-shaped portion 372 to the peripheral edge 31b of the insertion opening 31a.

[0099] More specifically, the connecting portion 38 is configured by a plurality of ribs 39 aligned along the peripheral edge 31b of the insertion opening 31a. The plurality of ribs 39 are arranged at intervals in the circumferential direction (see arrows A1 and A2 in FIG. 9) extending along the peripheral edge 31b.

[0100] Furthermore, when the bottom 31 is viewed from the front, the dimension of each of the multiple ribs 39 in the longitudinal direction extending from the plate-shaped portion 37 toward the peripheral portion 31b is longer than the dimension in the thickness direction along the circumferential direction.

[0101] Specifically, in the example shown in FIG. 9 and the like, five ribs 39 are provided at equal intervals on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0102] 8 and 9, each connecting portion 38 is provided on the base end portion 37b of each plate-like portion 37. Each base end portion 37b is thin and easily bends and deforms, and is also close to the peripheral edge portion 31b of the insertion opening 31a, which is advantageous for enlarging the insertion opening 31a by bending and deforming.

[0103] As indicated by the arrows at both left and right ends of FIG. 8, the tip end 37a of each plate-shaped portion 37 is lifted in a direction (upward) away from the insertion opening 31a. This causes each plate-shaped portion 37 to bend and deform starting from the base end 37b. Then, as indicated by the diagonal arrows near the center of the figure, the bending deformation of each plate-shaped portion 37 is transmitted to the peripheral edge 31b of the bottom portion 31 via each connecting portion 38. This transmission acts to pull the peripheral edge 31b diagonally upward. When the bottom portion 31 is viewed from above, this action acts in a direction to enlarge the insertion opening 31a, as indicated by the arrows at both left and right ends of FIG. 9. By bending and deforming each plate-shaped portion 37 in this way, the insertion opening 31a can be enlarged.

[0104] The bending and deformation of each plate-shaped portion 37 may be performed manually by an operator or automatically by various machines. In this embodiment, the connecting portion 38 and the plurality of ribs 39 are each made of an elastic material that is integral with the plate-shaped portion 37. This elastic material is, for example, a blend of one or more of natural rubber and diene-based synthetic rubber.

[0105] <Method of manufacturing the vibration isolation device 1> FIG. 10 is a diagram for explaining a method for manufacturing the vibration isolation device 1. In FIG.

[0106] As shown in the upper part of FIG. 10, when manufacturing the vibration isolator 1 according to this embodiment, first, the stopper member 3 is inserted into the first bracket 11 through the opening 11b that opens to the side of the first bracket 11.

[0107] By this insertion, the bottom portion 31, the top portion 32, and the first side surface portion 33 to the fourth side surface portion 36 of the stopper member 3 are accommodated inside the first bracket 11. At that time, the first plate-shaped portion 371 and the second plate-shaped portion 372 are extended to the outside through the opening portion 11b of the first bracket 11 (see also FIG. 2 for the first and second plate-shaped portions 371, 372).

[0108] Next, as shown in the middle of Figure 10, the tip portion 21 of the vibration-damping member 2 is pressed into the first bracket 11 to which the stopper member 3 is attached through the insertion opening 11e opening downward, and the tubular member 22 is pressed into the annular portion 11a to be fixed.

[0109] At this time, the tip 21 of the vibration-proof member 2 is inserted into the stopper member 3 attached to the first bracket 11 through an insertion opening 31a opened in the bottom 31 of the stopper member 3, and the stopper member 3 is placed over the tip 21.

[0110] 10 corresponds to a step of placing the stopper member 3 over the vibration-damping member 2 together with the first bracket 11. This is equivalent to simultaneously performing the step of press-fitting the vibration-damping member 2 into the first bracket 11 and the step of placing the stopper member 3 over the vibration-damping member 2.

[0111] However, to achieve this process, it is necessary to simultaneously insert the tip portion 21 of the vibration-proof member 2 into the insertion opening 11e of the first bracket 11 and the insertion opening 31a of the stopper member 3. Such insertion is not necessarily easy.

[0112] Here, the plate-shaped portion 37 of the stopper member 3 is in a state where it is extended from the first bracket 11. As described above, by bending and deforming the plate-shaped portion 37 upward, it is possible to enlarge the insertion opening 31a of the stopper member 3. This makes it easier to insert the tip end 21 of the vibration-proof member 2 into the insertion opening 11e of the first bracket 11 and the insertion opening 31a of the stopper member 3.

[0113] Next, as shown in the lower part of Fig. 10, the second bracket 12 is inserted through the first bracket 11, to which the stopper member 3 and the vibration-damping member 2 are attached, from the opening 11b that opens to the side of the first bracket 11. As shown in Fig. 2, the second bracket 12 is inserted so as to penetrate all of the vibration-damping member 2, the stopper member 3, and the first bracket 11.

[0114] <Significance of the stopper member 3 according to this embodiment> The inventors of the present application have investigated a process in which stopper member 3 is attached to first bracket 11 in advance, and then first bracket 11 is covered with stopper member 3 on a cylindrical member (vibration-isolating member 2).

[0115] However, when such a process is adopted, it is not easy to simultaneously perform the process of press-fitting the vibration-damping member 2 into the first bracket 11 and the process of covering the vibration-damping member 2 with the stopper member 3. This is inconvenient in terms of improving the productivity of the vibration-damping device 1.

[0116] On the other hand, according to the embodiment, the plate-like portion 37 of the stopper member 3 is extended to the outside of the first bracket 11 (see FIGS. 2 and 10, etc.). Therefore, even if the stopper member 3 is attached to the first bracket 11 prior to the insertion (press-fitting) of the vibration-damping member 2, the plate-like portion 37 extended from the first bracket 11 can be bent and deformed.

[0117] 8 and 9, the insertion opening 31a of the stopper member 3 can be enlarged by bending and deforming the plate-like portion 37. The enlargement of the insertion opening 31a contributes to smooth insertion of the tip end portion 21 of the vibration-damping member 2.

[0118] Therefore, even if the stopper member 3 is attached to the first bracket 11 in advance, it becomes possible to simultaneously attach or insert both the first bracket 11 and the stopper member 3 to the vibration-damping member 2. This allows the productivity of the vibration-damping device 1 to be improved.

[0119] Furthermore, during the press-fitting process, there is no need to make the stopper member 3 slip through the insertion opening 31a of the first bracket 11. Therefore, the stopper member 3 can be shaped in accordance with the required spring characteristics, durability, etc., without impairing design freedom.

[0120] 7 to 9, the connecting portion 38 connecting the plate-like portion 37 and the peripheral edge 31b of the insertion opening 31a is configured by a plurality of ribs 39 arranged at intervals from one another. By using these ribs 39, each portion along the peripheral edge 31b of the insertion opening 31a can be enlarged as evenly as possible. This is advantageous for smooth insertion of the vibration-damping member 2 and for improving the productivity of the vibration-damping device 1.

[0121] 9, each rib 39 is formed to be elongated in a front view so as to extend from the plate-like portion 37 toward the peripheral edge portion 31b. This makes it possible to minimize increases in weight and manufacturing costs that would otherwise be associated with the addition of multiple ribs 39.

[0122] 6 to 9, etc., plate-like portions 37 are provided on both the left and right sides of the stopper member 3. This allows the second bracket 12 to fix the stopper member 3 from both the left and right sides, which is more convenient for appropriately fixing the stopper member 3 than a configuration in which only one of the left and right sides is fixed. Furthermore, the load that the second bracket 12 applies to the stopper member 3 is distributed in a balanced manner to both sides where the plate-like portions 37 are provided, which is more convenient for preventing the plate-like portions 37, and therefore the stopper member 3, from tearing, falling off, etc.

[0123] 9, protrusions 35a, 36a that thicken the third and fourth side surface portions 35, 36 are provided on the third and fourth side surface portions 35, 36. This makes it possible to suppress deformation in unintended directions (for example, deformation in a direction approaching the central axis O of the vibration-damping member 2) in the third and fourth side surface portions 35, 36 when the plate-shaped portion 37 is bent and deformed, and to suppress reduction in the insertion opening 31a due to such deformation.

[0124] Furthermore, the vibration isolation device 1 and stopper member 3 of this embodiment can contribute to achieving Goal 9, "Build resilient infrastructure, promote inclusive and sustainable industrialization, innovate and promote innovation," among the Sustainable Development Goals (SDGs), which are international goals aimed at achieving a sustainable and better world by 2030 as set out in the "2030 Agenda for Sustainable Development" unanimously adopted by member states at the United Nations Summit in September 2015.

[0125] <Other embodiments> 1 to 10 has been described in the above embodiment, but the present disclosure is not limited to such a stopper member 3. The inventors of the present application have explored various variations of the stopper member 3 and its connecting portion 38.

[0126] 11 to 16B show examples of other embodiments of the stopper member 3 that were obtained through such exploration. Specifically, FIG. 11 is a view corresponding to FIG. 9 showing a stopper member 103 according to a second embodiment. FIG. 12 is a view corresponding to FIG. 9 showing a stopper member 203 according to a third embodiment. FIG. 13 is a view corresponding to FIG. 9 showing a stopper member 303 according to a fourth embodiment.

[0127] 14A is a view corresponding to FIG. 9 showing a stopper member 403 according to the fifth embodiment. FIG. 14B is a perspective view showing the stopper member 403 according to the fifth embodiment. FIG. 15A is a view corresponding to FIG. 9 showing a stopper member 503 according to the sixth embodiment. FIG. 15B is a plan view showing the stopper member 503 according to the sixth embodiment. FIG. 16A is a view corresponding to FIG. 9 showing a stopper member 603 according to the seventh embodiment. FIG. 16B is a perspective view showing the stopper member 603 according to the seventh embodiment.

[0128] 1 to 10 may be referred to as the "first stopper member 3" according to the "first embodiment." Similarly, the stopper member 103 according to the second embodiment to the stopper member 603 according to the seventh embodiment may be referred to as the "second stopper member 103," the "third stopper member 203," the "fourth stopper member 303," the "fifth stopper member 403," the "sixth stopper member 503," and the "seventh stopper member 603," respectively.

[0129] 17 is a view corresponding to FIG. 9 showing a comparative example of the stopper member 3. Hereinafter, this comparative example may be referred to as an "eighth stopper member 703."

[0130] As shown in Figures 11 to 17, the second stopper member 103 to the eighth stopper member 703 all have an insertion opening 31a configured in the same manner as the first stopper member 3, a first plate-shaped portion 371, and a second plate-shaped portion 372.

[0131] -Second stopper member 103- As shown in FIG. 11, the second stopper member 103 has two ribs 139 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0132] Each rib 139 of the second stopper member 103 extends toward both ends of the insertion opening 31a, rather than toward the center of the insertion opening 31a. Each rib 139 is formed wider (thicker) than each rib 39 of the first stopper member 3. In the table of FIG. 20 described below, a relatively wide rib is indicated as "thick" and a relatively narrow rib is indicated as "thin." Each rib 139 extends straight in the left-right direction, similar to each rib 39 of the first stopper member 3.

[0133] -Third stopper member 203- As shown in FIG. 12, the third stopper member 203 has two ribs 239 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0134] The ribs 239 of the third stopper member 203 extend toward both ends of the insertion opening 31a. The ribs 239 are formed wider (thicker) than the ribs 39 of the first stopper member 3. Unlike the ribs 39 of the first stopper member 3, the ribs 239 extend obliquely so that they become more distant from each other in the front-rear direction as they approach the insertion opening 31a in the left-right direction.

[0135] -Fourth stopper member 303- As shown in FIG. 13, the fourth stopper member 303 has four ribs 339 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0136] In the fourth stopper member 303, the four ribs 339 on each of the first and second plate-shaped portions 371, 372 are configured by a combination of two relatively wide, diagonally extending first ribs 339a and two relatively narrow, straight extending second ribs 339b. The two first ribs 339a are configured similarly to the two ribs 239 on the third stopper member 203. The two second ribs 339b are configured similarly to the two ribs 39 on the first stopper member 3. The two first ribs 339a are located near both ends in the front-rear direction (outside the front-rear direction). The two second ribs 339b are located near the center in the front-rear direction.

[0137] -Fifth stopper member 403- As shown in FIG. 14A, the fifth stopper member 403 has four ribs 439 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0138] The four ribs 439 of the fifth stopper member 403 are configured by a combination of two first ribs 439a and two second ribs 439b. The two first ribs 439a are configured similarly to the first ribs 339a of the fourth stopper member 303. The two second ribs 439b are configured similarly to the second ribs 339b of the fourth stopper member 303.

[0139] 14A and 14B, a plurality of cut-out portions 371a are arranged on the upper surface of the first plate-shaped portion 371 of the fifth stopper member 403. Each cut-out portion 371a penetrates the first plate-shaped portion 371 in the plate thickness direction (vertical direction). Each cut-out portion 371a is located between four ribs 439 of the first plate-shaped portion 371. Each cut-out portion 371a is separated from the insertion opening 31a.

[0140] 14A and 14B, a plurality of cut-out portions 372a are arranged on the upper surface of the second plate-shaped portion 372 of the fifth stopper member 403. Each cut-out portion 372a penetrates the second plate-shaped portion 372 in the plate thickness direction (vertical direction). Each cut-out portion 372a is located between four ribs 439 of the second plate-shaped portion 372. Each cut-out portion 372a is separated from the insertion opening 31a.

[0141] -Sixth stopper member 503- As shown in FIG. 15A, the sixth stopper member 503 has four ribs 539 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0142] The four ribs 539 of the sixth stopper member 503 are configured by a combination of two first ribs 539a and two second ribs 539b. The two first ribs 539a are configured similarly to the first ribs 339a of the fourth stopper member 303. The two second ribs 539b are configured similarly to the second ribs 339b of the fourth stopper member 303.

[0143] 15B, two third ribs 539c are disposed on the upper surface of the first plate-shaped portion 371 of the sixth stopper member 503. The two third ribs 539c are configured similarly to the first ribs 539a. That is, each third rib 539c is relatively wide and extends obliquely. The extending direction of each third rib 539c is the same as that of the first ribs 539a of the first plate-shaped portion 371.

[0144] 15B, two third ribs 539c are disposed on the upper surface of the second plate-shaped portion 372 of the sixth stopper member 503. Each of the two third ribs 539c has the same configuration as each of the first ribs 539a. That is, each of the third ribs 539c is relatively wide and extends obliquely. The extending direction of each of the third ribs 539c is the same as that of the first ribs 539a of the second plate-shaped portion 372.

[0145] The third ribs 539c arranged on the first plate-shaped portion 371 and the second plate-shaped portion 372 function as the connecting portion in the present disclosure, similar to the first ribs 539a and the second ribs 539b. The same applies to the third rib 639c of the seventh stopper member 603, which will be described later.

[0146] -Seventh stopper member 603- As shown in FIG. 16A, the seventh stopper member 603 has four ribs 639 as connecting portions on each of the first plate-shaped portion 371 and the second plate-shaped portion 372.

[0147] The four ribs 639 of the seventh stopper member 603 are configured by a combination of two first ribs 639a and two second ribs 639b. The two first ribs 639a are configured similarly to the first ribs 339a of the fourth stopper member 303. The two second ribs 639b are configured similarly to the second ribs 339b of the fourth stopper member 303.

[0148] 16A and 16B, a plurality of cut-out portions 371a are arranged on the upper surface of the first plate-shaped portion 371 of the seventh stopper member 603. Each cut-out portion 371a penetrates the first plate-shaped portion 371 in the plate thickness direction (vertical direction). Each cut-out portion 371a is located between four ribs 639 of the first plate-shaped portion 371. Each cut-out portion 371a is separated from the insertion opening 31a.

[0149] 16A and 16B, a plurality of cut-out portions 372a are arranged on the upper surface of the second plate-shaped portion 372 of the seventh stopper member 603. Each cut-out portion 372a penetrates the second plate-shaped portion 372 in the plate thickness direction (vertical direction). Each cut-out portion 372a is located between four ribs 639 of the second plate-shaped portion 372. Each cut-out portion 372a is separated from the insertion opening 31a.

[0150] Furthermore, as shown in FIG. 16B, two third ribs 639c are arranged on the upper surface of the first plate-shaped portion 371 of the seventh stopper member 603 (only one is shown in FIG. 16B). The two third ribs 639c are configured similarly to the first ribs 639a. That is, each third rib 639c is relatively wide and extends obliquely. The extending direction of each third rib 639c is the same as that of the first rib 639a of the first plate-shaped portion 371.

[0151] Furthermore, as shown in FIG. 16B, two third ribs 639c are arranged on the upper surface of the second plate-shaped portion 372 of the seventh stopper member 603 (only one is shown in FIG. 16B). Each of the two third ribs 639c is configured similarly to each of the first ribs 639a. That is, each of the third ribs 639c is relatively wide and extends obliquely. The extending direction of each of the third ribs 639c is the same as that of the first rib 639a of the second plate-shaped portion 372.

[0152] -Eighth stopper member 703- 17, an eighth stopper member 703 as a comparative example does not have ribs as connecting portions on either the first plate-shaped portion 371 or the second plate-shaped portion 372. Furthermore, the eighth stopper member 703 does not have the cut-out portions 371a, 372a like the fifth stopper member 403 and the seventh stopper member 603.

[0153] - Expansion amount study results - 18 is a bottom view illustrating the expansion amount ΔW and insertion amount ΔI of the stopper member 3 according to the first embodiment. FIG. 19 is a table showing the expansion amount of the insertion opening 31a when the plate-like portion 37 is bent and deformed in the stopper members according to the first to seventh embodiments and a comparative example.

[0154] Figure 18 shows, in a slightly exaggerated manner, the deformation of the insertion opening 31a described with reference to Figure 9. As shown in Figure 18, when the first and second plate-shaped portions 371, 372 are bent upward, the opening edges (left and right opening edges) of the insertion opening 31a at the portions where the ribs 39 are lined up expand laterally. Accompanying this expansion, the opening edges (front and rear opening edges) of the insertion opening 31a at the portions where the ribs 39 are not arranged also expand front and rear. Of the amount of change in the width of the insertion opening 31a at this time, the expansion amount ΔW on either the front or rear side corresponds to the "expansion amount (one side)" in the table of Figure 19.

[0155] 19, the expansion of the insertion opening 31a was confirmed in all of the first to seventh embodiments. The expansion amount ΔW in each embodiment increased in the order of the first embodiment, the second embodiment, the fifth embodiment, the third embodiment, the fourth embodiment, the seventh embodiment, and the sixth embodiment.

[0156] The third stopper member 203 has ribs 239 extending diagonally near both ends in the front-rear direction. The fourth stopper member 303 has a first rib 339a configured similarly to the rib 239 of the third stopper member 203. It is believed that the provision of the first rib 339a relatively increases the amount of expansion ΔW near the third side surface portion 35 and the fourth side surface portion 36. Furthermore, by providing a third rib 539c like the sixth stopper member 503, the amount of expansion ΔW reaches its maximum value.

[0157] 19, the third stopper member 203, the fourth stopper member 303, and the sixth stopper member 503 all have a larger insertion amount ΔI than the first stopper member 3 and the second stopper member 103. In particular, the sixth stopper member 503 has a maximized expansion amount ΔW, and also has a relatively large insertion amount ΔI.

[0158] The insertion amount ΔI here refers to the insertion amount on one side (the displacement amount of the lower edge 3c of the second insertion hole 34a) when the plate-shaped portion 37 is bent and deformed, as shown in the black circle in Fig. 8, Fig. 9, Fig. 14B, and Fig. 18. In the table, the displacement amount when the housing space S is displaced in a direction that reduces the space S is defined as "positive." As shown by the thick black arrow in Fig. 8, the insertion amount ΔI is inconvenient for achieving smooth insertion of the vibration-damping member 2. It would be advantageous to minimize the insertion amount ΔI while increasing the expansion amount ΔW described above.

[0159] As a result of extensive research, the inventors of the present invention have newly discovered that the insertion amount ΔI can be suppressed by providing reduced-thickness portions 371a, 371b such as the fifth stopper member 403 shown in FIG. 14B.

[0160] However, as can be seen from a comparison between the "fourth embodiment" and the "fifth embodiment" in FIG. 19, simply providing the thinned portions 371a, 372a suppresses not only the insertion amount ΔI but also the expansion amount ΔW.

[0161] Therefore, as in the seventh embodiment, by using the seventh stopper member 603 which combines the cut-out portions 371a, 372a and the third rib 639c, it is possible to increase the expansion amount ΔW to the same level as in the sixth embodiment while minimizing the insertion amount ΔI.

[0162] That is, by arranging multiple ribs 639 on both the front and back surfaces (top and bottom surfaces) of each of the first and second plate-shaped portions 371, the insertion opening 31a can be enlarged more significantly compared to a configuration in which ribs are arranged on only the front or back surface, which is advantageous in realizing smooth insertion of the vibration-proofing member 2.

[0163] The seventh embodiment is particularly advantageous compared to the other embodiments in that the vibration-proof member 2 can be inserted smoothly.

[0164] On the other hand, in the comparative example, the expansion of the insertion opening 31a was hardly observed. It can be said that the conventional stopper member is inconvenient for inserting the vibration-proof member 2 compared to the first to seventh embodiments.

[0165] Further embodiments In the above embodiment, a case is described in which "one of the vibration source 101 and the vibration-proof target portion 102" is "vibration source 101" and "the other of the vibration source 101 and the vibration-proof target portion 102" is "vibration-proof target portion 102," but this explanation is merely an example.

[0166] In the above descriptions, the "vibration source 101" may be read as the "vibration isolation target 102" and the "vibration isolation target 102" may be read as the "vibration source 101" as appropriate.

[0167] Furthermore, the association of the bottom 31, top 32, and first to fourth side surface portions 33 to 36 that constitute the stopper member 3 with each direction is merely for the sake of simplicity. For example, the bottom 31 may face upward, or may face in an oblique direction that is not classified as either the up-down, left-right, or front-to-back direction. Furthermore, the term "vibration-proof member 2" is a convenient name and does not limit its use.

[0168] Furthermore, the configurations of the first and second brackets 11 and 12 are not limited to those of the above embodiment. For example, the second bracket 12 may be a bracket based on another fastening method, such as a bracket using a fastener other than the spindle 12c.

[0169] The number, thickness, and spacing of the ribs in each embodiment, including the rib 39 in the first embodiment, can be changed as appropriate. The same applies to the ribs arranged on the upper surface of the plate-shaped portion 37, such as the third rib 539c in the sixth embodiment. The number, thickness, spacing, etc. of the ribs on the upper and lower surfaces of the plate-shaped portion 37 may also be different.

[0170] In the above embodiment, the cut-out portions 371a, 372a penetrate the plate-shaped portion 37 in the thickness direction, but the present invention is not limited to such a configuration. The cut-out portions 371a, 372a may be formed by partially thinning the plate-shaped portion 37 in the thickness direction. [Explanation of symbols]

[0171] 1. Vibration isolation device 2. Vibration-proofing material 21 Tip 21a Through hole 3 Stopper member 31 Bottom 31a Insertion port 31b Periphery 32 Top 32a Projection 33 First side part 33a First insertion hole (insertion hole) 34 Second side part 34a Second insertion hole (insertion hole) 35 Third side part 35a Projection 36 4th side part 36a Projection 37 Plate-shaped part 371 First plate-shaped part (plate-shaped part) 371a Thinning part 372 Second plate-shaped part (plate-shaped part) 372a Thinning section 38 Connecting part 381 1st connection part (connection part) 382 2nd connection part (connection part) 39 Ribs 39a 1st Rib 39b Second Rib 39c 3rd rib 11 First Bracket 11b Open part 11e insertion slot 11f Stay section 12 Second Bracket 101 Vibration source 102 Anti-vibration target part A1 Circulation Direction A2 Circulation Direction O center axis

Claims

1. a stopper member that is interposed between a first bracket and the vibration-isolating member, and that covers a tip end of the vibration-isolating member, so as to elastically suppress displacement between the first bracket and the vibration-isolating member that is attached to one of the vibration source and the vibration-isolating target, a bottom portion having an insertion opening into which the tip portion is inserted; a plate-like portion that is extended to the outside of the first bracket and allows bending deformation in a direction away from the insertion opening; a connecting portion that connects the plate-shaped portion to a peripheral portion of the insertion opening, The connecting portion is configured to enlarge the insertion opening in accordance with bending deformation of the plate-shaped portion. A stopper member characterized by:

2. 2. The stopper member according to claim 1, the connecting portion is formed by a plurality of ribs arranged along the peripheral edge portion, The plurality of ribs are spaced apart in a circumferential direction extending along the peripheral edge. A stopper member characterized by:

3. 3. The stopper member according to claim 2, When the bottom portion is viewed from the front, the dimension of each of the plurality of ribs in a longitudinal direction extending from the plate-like portion toward the peripheral edge portion is longer than the dimension in a thickness direction along the circumferential direction. A stopper member characterized by:

4. 3. The stopper member according to claim 2, The plate-shaped portion is provided with a cutout portion separated from the insertion opening, The cutout portion is disposed between the plurality of ribs. A stopper member characterized by:

5. The stopper member according to at least one of claims 2 to 4, The plurality of ribs are disposed on both the front and rear surfaces of the plate-shaped portion. A stopper member characterized by:

6. 2. The stopper member according to claim 1, the vibration-damping member is attached to the other of the vibration source and the vibration-damping target via a second bracket, the tip end portion has a through hole that opens in a direction different from the insertion opening and is penetrated by the second bracket, the stopper member has an insertion hole that is passed through by the second bracket together with the through hole, and includes first and second side surface portions that sandwich the tip portion from both sides in a predetermined direction, the plate-like portion is interposed between the first bracket and the second bracket, the plate-shaped portion includes a first plate-shaped portion extending from a peripheral edge portion of the insertion hole in the first side surface portion, and a second plate-shaped portion extending from a peripheral edge portion of the insertion hole in the second side surface portion, The connecting portion includes a first connecting portion that connects the first plate-shaped portion to the peripheral edge portion of the insertion opening, and a second connecting portion that connects the second plate-shaped portion to the peripheral edge portion of the insertion opening. A stopper member characterized by:

7. 7. The stopper member according to claim 6, third and fourth side portions that connect the first and second side portions and sandwich the tip portion from both sides in a direction different from the predetermined direction, The third and fourth side surface portions each have a protrusion portion that partially thickens the third and fourth side surface portions. A stopper member characterized by:

8. a vibration-isolating member attached to one of the vibration source and the vibration-isolating target via a first bracket; a stopper member interposed between the first bracket and the vibration-isolating member so as to elastically suppress displacement between the vibration-isolating member and the first bracket, and covering a tip end of the vibration-isolating member, The stopper member is a bottom portion having an insertion opening into which the tip portion is inserted; a plate-like portion that is extended to the outside of the first bracket and allows bending deformation in a direction away from the insertion opening; a connecting portion that connects the plate-shaped portion to a peripheral portion of the insertion opening, The connecting portion is configured to enlarge the insertion opening in accordance with bending deformation of the plate-shaped portion. A vibration isolation device characterized by:

9. A method for manufacturing the vibration isolation device according to claim 8, The stopper member is attached to the first bracket, The vibration-proof member is press-fitted into the first bracket to which the stopper member is attached through the insertion opening. A method for manufacturing an anti-vibration device, comprising:

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