JP2023170298A - Antivibration device - Google Patents

Abstract

To provide an antivibration device capable of improving the durability of a bracket.SOLUTION: A second bracket 30 is mounted on the vehicle body side with a bolt 39 inserted into mounting holes 36a, 37a, 38b of the second bracket 30. By holding a plurality of continuous annular plates 38 between two mounting plates 36, 37 separating from each other in a vertical direction U-D, the mounting holes 36a, 37a, 38b are formed penetrating through mutually overlapping portions. Thus, a fastening portion of the second bracket 30 with the bolt 39 is thickened for higher rigidity to improve the durability of the second bracket 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration isolator, and particularly to a vibration isolator that can improve the durability of a bracket.

The vibration isolator includes a vibration isolator main body in which a first member and a second member are connected by a vibration isolator made of an elastic body, a first bracket to which the first member is fixed, and a second bracket to which the second member is fixed. A bracket is provided. A first bracket is attached to one of the vibration source (for example, engine) side and the vibration receiver (for example, vehicle body) side, and the second bracket is fastened to the other side by a fastening member. Vibration transmission between the vibration source side and the vibration receiving side is suppressed by the vibration isolator.

For example, the second bracket disclosed in Patent Document 1 includes a cylindrical part into which a cylindrical second member is fitted, and a rectangular cylindrical part whose upper end is joined to the outer peripheral surface and surrounds the arm of the first bracket. , and a pair of legs provided on both left and right sides of the rectangular tube part. The legs are formed by bending the plate into a substantially U-shape when viewed from the left and right, and a vertical reinforcing plate stands up from the bottom plate. Vertical reinforcing plates are joined to the side wall plates on both the left and right sides of the rectangular tube part. A fastening member is inserted into a mounting hole formed through the bottom plate, and the second bracket is fastened to the vibration receiving side.

Japanese Patent Application Publication No. 2011-7261

However, in the above-mentioned prior art, since the part of the second bracket that is fastened to the vibration receiving side by the fastening member is only one bottom plate, the rigidity of the fastened part is low. In addition, when connecting the bottom plate and the side wall plates with a vertical reinforcing plate that is perpendicular to both, the rigidity of the connecting part may be insufficient in response to input from the first bracket to the second bracket in the left and right direction. . As described above, the above-mentioned conventional technology has a problem in that the second bracket has low durability.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vibration isolator that can improve the durability of the second bracket.

In order to achieve this object, the vibration isolator of the present invention includes a vibration isolator main body in which a first member and a second member are connected by a vibration isolator base made of an elastic body, and a vibration isolator body that extends in a first direction and has a first member that extends in a first direction. A first bracket having a fixed arm and attached to one of the vibration source side and the vibration receiving side, and a second bracket fastened to the other of the vibration source side and the vibration receiving side with a fastening member. , the second bracket includes a fixing part to which the second member is fixed, a first plate on which the fixing part is provided, and the first plate in a second direction perpendicular to the first direction. a second plate facing each other across the arm; and a pair of side walls facing each other across the arm in a third direction perpendicular to the first direction and the second direction and connecting the first plate and the second plate. a plurality of mounting plates that respectively extend from the side wall plate in the third direction and are arranged apart from each other in the second direction; and a spacer that is sandwiched between the plurality of mounting plates in the second direction; A mounting hole into which the fastening member is inserted is formed in a portion where the mounting plate and the spacer overlap in the second direction.

According to the vibration isolating device according to the first aspect, the second bracket is attached to the other of the vibration source side and the vibration receiving side by the fastening member inserted into the attachment hole of the second bracket. This mounting hole is formed through a portion where a plurality of mounting plates that are spaced apart in the second direction overlap each other by sandwiching a spacer between the mounting plates. Therefore, the portion of the second bracket that is fastened by the fastening member can be made thicker and more rigid.

Further, this mounting plate extends in the third direction from a pair of side wall plates facing each other with the arm of the first bracket interposed in the third direction. Thereby, when there is an input in the third direction from the first bracket to the second bracket, the mounting plate is stretched substantially straight in response to the input between the fastening member and the side wall plate. Therefore, the rigidity of the second bracket against input in the third direction can be improved. As a result, the durability of the second bracket can be improved.

According to the vibration isolator according to the second aspect, in addition to the effects provided by the vibration isolator according to the first aspect, the following effects are achieved. At least one of the plurality of mounting plates spaced apart in the second direction is located at a position overlapping the arm when viewed from the third direction. As a result, even if the vibration isolating base is deformed by input in the third direction and the arm is pressed against the side wall plate, the mounting plate is held substantially straight between the arm and the fastening member. As a result, the rigidity of the second bracket against input in the third direction can be further improved, and the durability of the second bracket can be further improved.

According to the vibration isolator according to the third aspect, in addition to the effects provided by the vibration isolator according to the first aspect, the following effects are achieved. The edges of the first plate and the side wall plate are connected to each other at curved corners. A fixing part formed in a cylindrical or elliptical shape into which the second member is fitted projects from the first plate and the corner to the side opposite to the second plate. The dimension of the connecting portion between the fixing portion and the corner portion in the first direction decreases toward the side wall plate. In this manner, the connecting portion becomes smaller toward the side wall plate, thereby improving the rigidity in the vicinity of the connecting portion.

According to the vibration isolator according to the fourth aspect, in addition to the effects provided by the vibration isolator according to the first aspect, the following effects are achieved. The second bracket includes a vertical reinforcing plate rising vertically from the side wall plate and the mounting plate. This makes it difficult for the side wall plate to fall toward the mounting plate when inputting the third direction to the second bracket. In this way, the rigidity of the second bracket can be improved by the vertical reinforcing plate, and the durability can be further improved.

According to the vibration isolator according to claim 5, in addition to the effects provided by the vibration isolator according to any one of claims 1 to 4, the following effects are achieved. The spacer is formed by stacking a plurality of annular plates in the second direction, each having a mounting hole in the center. Compared to a case where the spacer is a single cylindrical body, it is easier to manufacture the spacer at a lower cost by punching from a plate material if the annular plate is used. Furthermore, the distance between the mounting plates can be easily adjusted by adjusting the number of stacked annular plates.

According to the vibration isolator according to the sixth aspect, in addition to the effects provided by the vibration isolator according to the fifth aspect, the following effects are achieved. The mounting plate is provided with a plurality of mounting holes. A connecting ring plate is formed by connecting the annular plates separated in at least one of the first direction and the third direction so as to correspond to the plurality of attachment holes at the connecting portion. A spacer is formed by stacking a plurality of these linking plates in the second direction. Therefore, the number of parts constituting the spacer can be reduced compared to the case where there is no connection part.

According to the vibration isolator according to the seventh aspect, in addition to the effects provided by the vibration isolator according to the sixth aspect, the following effects are achieved. The connecting portions that overlap in the second direction are joined to each other, and the connecting portions are joined to the mounting plate. By separating these joining portions from the vicinity of the mounting hole, that is, from the region on which the axial force of the fastening member acts, it is possible to suppress the influence of the shape change caused by the joining on the axial force of the fastening member.

It is a perspective view of the vibration isolator in a 1st embodiment. FIG. 3 is a cross-sectional view of the vibration isolator. 3 is a cross-sectional view of the vibration isolator taken along line III-III in FIG. 2. FIG. FIG. 3 is an exploded perspective view of the second bracket. It is a perspective view of the vibration isolator in 2nd Embodiment. It is a perspective view of the vibration isolator in 3rd Embodiment.

Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a vibration isolator 10 in the first embodiment. FIG. 2 is a sectional view of the vibration isolator 10. FIG. 3 is a cross-sectional view of the vibration isolator 10 taken along line III-III in FIG. FIG. 4 is an exploded perspective view of the second bracket 30.

In the following explanation, the upper side of the paper in FIG. 2 is the upper direction U of the vibration isolator 10, the lower side of the paper is the downward direction D, the left side of the paper is the front direction F, the right side of the paper is the rear direction B, and the near side of the paper. Let the left direction be L, and the back side of the page be the right direction R. These up-down direction UD (second direction), front-back direction FB (first direction), and left-right direction LR (third direction) are perpendicular to each other. The vertical direction UD of the vibration isolator 10 does not necessarily match the vertical direction of the vehicle in which the vibration isolator 10 is mounted. For example, the upward direction of the vibration isolator 10 may be made to match the downward direction of the vehicle, or the left-right direction of the vibration isolator 10 may be made to match the vertical direction of the vehicle. Further, each of these directions is the same in the second and third embodiments.

As shown in FIG. 1, the vibration isolator 10 is an engine mount that elastically supports the engine of a vehicle. The vibration isolator 10 includes a first bracket 11 that is attached to the engine (vibration source) side, a vibration isolator body 20 that is fixed to the first bracket 11, and a vibration isolator body that is attached to the vehicle body (vibration receiver) side. 20 is fixed to the second bracket 30.

As shown in FIGS. 1 and 2, the first bracket 11 is a metal member including a base 12 and an arm 15. As shown in FIGS. The base 12 is a thick plate-shaped portion perpendicular to the front-rear direction FB, and a plurality of through holes 13 are formed therethrough. The first bracket 11 is attached to the engine side by a bolt 14 inserted into the through hole 13.

The arm 15 is a substantially square bar-shaped portion extending in the forward direction F from the base 12. The upper and lower surfaces of the arm 15 are perpendicular to the up-down direction UD, and the left and right surfaces of the arm 15 are perpendicular to the left-right direction LR. The periphery (top, bottom, left and right) of this arm 15 is covered with a buffer body 18 made of an elastic body (for example, rubber). Further, a through hole 16 into which a bolt 17 is inserted is formed in the front end portion of the arm 15 in the forward direction F in the vertical direction UD.

The vibration isolator main body 20 includes a shaft-shaped first member 21, a cylindrical second member 22 surrounding the first member 21, and an elastic vibration-isolating base 23 that connects them. The first member 21 is a boss metal fitting formed along an axis C parallel to the up-down direction UD. Note that the cross-sectional view of FIG. 2 shows a cross section of the vibration isolator 10 including the axis C and perpendicular to the left-right direction LR.

A bolt hole 21a into which the bolt 17 is fastened is formed along the axis C at the lower end of the first member 21. By fastening the bolt 17 inserted into the through hole 16 of the arm 15 to the bolt hole 21a, the first member 21 protrudes from the tip of the arm 15 in the upward direction U, and the first member 21 is fixed to the arm 15.

The second member 22 is a substantially cylindrical member centered on the axis C, and is mainly formed of metal such as steel. The second member 22 is arranged offset in the upward direction U with respect to the first member 21 . The second member 22 is formed in the shape of a conical tube whose inner and outer diameters gradually decrease as the central portion in the up-down direction UD goes toward the upward direction U. In the second member 22, the inner and outer diameters of the cylindrical portion on the upper end side are smaller than the cylindrical portion on the lower end side of the central portion.

The vibration-proof base 23 is a member made of an elastic material such as rubber or thermoplastic elastomer, and is formed into a substantially umbrella shape that is upside down. The vibration isolating base 23 is vulcanized and bonded to the outer circumferential surface of the first member 21 and the inner circumferential surface of the second member 22 over the entire circumference, thereby connecting them.

Vibrations mainly in the left-right direction LR are input to the vibration isolator 10. Due to this input, the vibration isolating base 23 is elastically deformed, and the first bracket 11 and first member 21 move (vibrate) in the left-right direction LR with respect to the second bracket 30 and second member 22.

The second bracket 30 includes a fixing portion 31, a first plate 32, a second plate 33, a pair of side wall plates 34, a plurality of mounting plates 36 and 37, and a plurality of link plates 38. Each part of the second bracket 30 is formed by punching or bending a plate material such as a steel plate.

The fixing portion 31 is a substantially cylindrical portion centered on the axis C. The lower end side of the second member 22 is press-fitted into the fixing portion 31 . The first plate 32 is a substantially flat plate-shaped portion that extends radially outward from the entire circumference of the lower end of the fixing portion 31 . The first plate 32 is formed perpendicular to the up-down direction UD. The first plate 32 is located above the arm 15.

The second plate 33 is a substantially flat plate-shaped portion perpendicular to the up-down direction UD. The second plate 33 is located below the arm 15. The first plate 32 and the second plate 33 face each other with the arm 15 in between in the vertical direction UD. Note that a hole 33a is formed through the second plate 33 at a position where the bolt 17 is visible when viewed from the downward direction D. As a result, with the vibration isolator main body 20 attached to the second bracket 30, a tool is inserted through the hole 33a and the bolt 17 is turned to fix the first member 21 of the vibration isolator main body 20 to the arm 15. You can also unpin.

As shown in FIGS. 1 and 3, each of the pair of side wall plates 34 is a substantially flat portion perpendicular to the left-right direction LR. The pair of side wall plates 34 face each other across the arm 15 in the left-right direction LR. The upper edges of the pair of side wall plates 34 are connected to the left and right edges of the first plate 32, and the lower edges of the pair of side wall plates 34 are connected to the left and right edges of the second plate 33, respectively.

The first plate 32, the second plate 33, and the pair of side wall plates 34 form a cylindrical body surrounding the arm 15 of the first bracket 11. Each part of this cylindrical body restricts relative movement of the first bracket 11 with respect to the second bracket 30 in the vertical direction UD and the horizontal direction LR. Note that the shock absorbers 18 provided on both the upper and lower surfaces of the arm 15 buffer the collision between the arm 15 and each part of the cylindrical body.

The fixing portion 31, the first plate 32, and the pair of side wall plates 34 are formed from one steel plate (plate material). As a specific manufacturing method, for example, the first plate 32 and the pair of side wall plates 34 are formed by bending both left and right sides of one steel plate substantially vertically in the downward direction D. Thereafter, the fixing portion 31 is formed by drawing a hole provided at the center of the first plate 32 while enlarging the hole and bending the periphery of the hole in the upward direction U.

The edges of the thus formed first plate 32 and side wall plate 34 are connected to each other by curved corners 35. Further, the outer diameter of the fixing portion 31 is approximately the same as the distance between the left and right outer surfaces of the pair of side wall plates 34. Therefore, the fixing portion 31 protrudes in the upward direction U not only from a portion of the first plate 32 perpendicular to the up-down direction UD but also from the corner portion 35.

The connecting portion between the cylindrical fixing part 31 whose outer peripheral surface is a curved surface and the curved corner part 35 has a dimension in the front-rear direction FB as it moves toward the side wall plate 34 because the directions of the curved surfaces differ by 90 degrees. becomes smaller. By shrinking the connecting portion toward the side wall plate 34 in this manner, the rigidity in the vicinity of the connecting portion can be improved.

As shown in FIGS. 1 and 4, the mounting plates 36 are substantially flat plate-shaped portions that extend the second plate 33 in the left-right direction LR, and are provided in a pair on the left and right sides. Although the dimensions of the mounting plates 36 on both the left and right sides are different, the same reference numerals are given to both sides to simplify the explanation. This simplification of explanation also applies to the mounting plate 37.

Two mounting holes 36a penetrating in the up-down direction UD are formed in the mounting plate 36 and are spaced apart in the front-rear direction FB. Further, the corners of the left and right inner edges of the pair of mounting plates 36 and the lower edges of the side wall plates 34 are welded over substantially the entire length in the front-rear direction FB, and a weld bead 40 is formed by this welding. As a result, the second plate 33, which is integrally molded with the mounting plate 36, is connected to the side wall plate 34. Further, the mounting plate 36 extends vertically from the side wall plate 34 in the left-right direction LR.

The mounting plates 37 are flat plate-shaped portions arranged apart from each other in the upward direction U of the mounting plate 36, and are provided in a pair on the left and right sides. The mounting plate 37 is formed to have the same shape and dimensions as the mounting plate 36 facing in the vertical direction UD. That is, a mounting hole 37a is formed through the mounting plate 37 at a position corresponding to the mounting hole 36a of the mounting plate 36.

The left and right inner edges of the mounting plate 37 are welded to the side wall plate 34 over substantially the entire length in the front-rear direction FB, and a weld bead 41 is formed by this welding. As a result, the mounting plate 37 extends vertically from the side wall plate 34 in the left-right direction LR. Further, the mounting plate 36 and the mounting plate 37 are arranged parallel to each other.

The link plate 38 is a plate-shaped member formed by punching from a steel plate. The connecting ring plate 38 includes annular plates 38a provided at both ends in the front-rear direction FB, and a connecting portion 38c that connects the two annular plates 38a.

The annular plate 38a is an annular portion with a mounting hole 38b formed in the center. The inner diameter of the mounting hole 38b is approximately the same as the inner diameter of the mounting holes 36a, 37a of the mounting plates 36, 37. Further, the connecting portion 38c is arranged so that the distance between the two mounting holes 36a and 37a, which are separated from each other in the front-back direction FB, and the distance between the mounting holes 38b of the two annular plates 38a are the same. The dimensions are set.

A spacer formed by stacking a plurality (four in this embodiment) of linking plates 38 in the vertical direction UD is sandwiched between the mounting plate 36 and the mounting plate 37. Attachment holes 36a, 37a, and 38b are formed through the overlapping portions of the attachment plates 36, 37 and the linking plate 38 (spacer) so as to be continuous in the vertical direction UD.

In order to manufacture the second bracket 30, first, parts such as the fixing part 31 and the link plate 38 are formed by punching or bending a steel plate (plate material). Next, the side wall plate 34 is welded to the second plate 33 and the mounting plate 36. Next, the plurality of link plates 38 are stacked on the mounting plate 36 while aligning the positions of the mounting holes 36a and 38b. Next, the mounting plate 37 is stacked on the link plate 38 while aligning the positions of the mounting holes 37a and 38b. Next, the mounting plate 37 is welded to the side wall plate 34. Finally, in order to prevent the overlapped portions from shifting before the bolts 39 are inserted, the connecting portions 38c of the plurality of link plates 38, the connecting portions 38c and the mounting plates 36, 37 are welded to each other to form a weld bead 42. .

According to the vibration isolator 10 described above, the second bracket 30 is fastened to the vehicle body by attaching the bolts 39 inserted into the mounting holes 36a, 37a, and 38b of the second bracket 30 to the vehicle body. This fastening portion is thick due to the overlapping of the mounting plates 36, 37 and the annular plate 38a. As a result, the fastening portion of the second bracket 30 can be made highly rigid, and the durability of the second bracket 30 can be improved.

Note that as the spacer sandwiched between the mounting plates 36 and 37, a single cylindrical body (for example, the spacer 52 of the second embodiment) may be used instead of a plurality of stacked annular plates 38a. However, when the annular plate 38a is used, the distance between the mounting plates 36 and 37 can be easily adjusted by adjusting the number of stacked annular plates 38a. In addition, it is easy to manufacture the annular plate 38a at low cost by punching a steel plate or the like.

Furthermore, together with the annular plate 38a, the mounting plates 36 and 37 for increasing the rigidity of the parts fastened by the bolts 39 can also be formed by punching from a steel plate, making bending, drawing, etc. unnecessary. Therefore, the structure for increasing the rigidity of the fastening portion can be manufactured more easily at lower cost.

Further, when a plurality of annular plates 38a (spacers) are sandwiched between the mounting plates 36 and 37, the connecting portion 38c may be omitted. However, the number of parts constituting the spacer can be reduced when the spacer includes the connecting portion 38c compared to when the spacer does not have the connecting portion 38c.

Furthermore, by providing this connecting portion 38c, a weld bead 42 can be formed in the connecting portion 38c. Thereby, it is not necessary to form (weld) the weld bead 42 for each of the plurality of stacked annular plates 38a, so the number of times of welding can be reduced. In addition, the weld bead 42 can be separated from the vicinity of the mounting holes 36a, 37a, 38b (such as the annular plate 38a) where the axial force from the bolt 39 acts. As a result, the axial force of the bolt 39 can be suppressed from being affected by changes in shape due to welding, such as swelling of parts of the mounting holes 36a, 37a, and 38b by the weld bead 42. That is, by forming the weld bead 42 on the connecting portion 38c, the axial force of the bolt 39 can be made difficult to reduce.

When there is an input in the left-right direction LR from the first bracket 11 to the second bracket 30, the mounting plates 36 and 37 are stretched substantially straight between the bolt 39 and the side wall plate 34 in response to the input. . Thereby, the rigidity of the second bracket 30 against input in the left-right direction LR can be improved, and the durability of the second bracket 30 can be improved.

In particular, as shown in FIG. 3, the mounting plate 37 is located at a position overlapping the portion of the arm 15 covered by the buffer body 18 when viewed in the left-right direction. As a result, when the vibration isolating base 23 is deformed by input in the left-right direction LR and the arm 15 is pressed against the side wall plate 34 via the buffer 18, the arm 15 and the bolt 39 are installed almost straight. The plate 37 is stretched. As a result, the rigidity of the second bracket 30 against input in the left-right direction LR can be further improved, and the durability of the second bracket 30 can be further improved.

Furthermore, when viewed in the left-right direction, it is preferable that the mounting plate 37 overlaps the central portion of the arm 15 covered by the buffer body 18 in the up-down direction UD. This central portion is, for example, a 25% to 75% portion when the upper surface of the arm 15 is 0% and the lower surface is 100%. In this case, the mounting plate 37 is located approximately at the center of the area where the second bracket 30 mainly receives the load from the arm 15 during input in the left-right direction LR. As a result, the bracing effect of the mounting plate 37 can be improved, and the durability of the second bracket 30 can be further improved.

Next, a second embodiment will be described with reference to FIG. In the first embodiment, a case has been described in which a spacer formed by stacking a plurality of link plates 38 is sandwiched between the mounting plates 36 and 37. In contrast, in the second embodiment, a case will be described in which a cylindrical spacer 52 is sandwiched between mounting plates 36 and 37. Note that the same parts as in the first embodiment are given the same reference numerals, and the following explanation will be omitted.

FIG. 5 is a perspective view of a vibration isolator 50 in the second embodiment. The second bracket 51 of the vibration isolator 50 includes a fixing portion 31, a first plate 32, a second plate 33, a pair of side wall plates 34, a plurality of mounting plates 36 and 37, and a plurality of spacers 52. A plurality of vertical reinforcing plates 53 are provided.

The spacer 52 is a cylindrical body in which a mounting hole into which the bolt 39 is inserted is formed along its axis. That is, the spacer 52 is the same as the one formed by integrally molding the plurality of annular plates 38a of the first embodiment, which are stacked on top of each other.

This spacer 52 is sandwiched between the mounting plates 36 and 37 at the positions of the plurality of mounting holes 36a and 37a, respectively. Thereby, similarly to the first embodiment, the portion of the second bracket 51 that is fastened by the bolt 39 can be made highly rigid, and the durability of the second bracket 51 can be improved.

Further, since the spacer 52 sandwiched between the mounting plates 36 and 37 is made of one cylindrical body, the number of parts constituting the spacer 52 can be reduced compared to the spacer (the plurality of annular plates 38a) of the first embodiment. Furthermore, in the second embodiment, unlike the first embodiment, there is no connecting portion 38c that connects the spacers 52 separated in the front-rear direction FB, so that the shape of the spacers 52 can be simplified. As a result, the manufacturing cost of the spacer 52 can be easily reduced.

The vertical reinforcing plate 53 is a substantially triangular plate that stands up vertically from the side wall plate 34 and the mounting plate 37, respectively. A plurality of vertical reinforcing plates 53 are arranged on both sides of the left-right direction LR and spaced apart from each other in the front-rear direction FB.

The edge of the vertical reinforcing plate 53 and the corner of the side wall plate 34 are welded over substantially the entire length in the vertical direction UD, and a weld bead 54 is formed by this welding. Further, the edges of the vertical reinforcing plate 53 and the corners of the mounting plate 37 are welded over substantially the entire length in the left-right direction LR, and a weld bead 55 is formed by this welding.

According to this vertical reinforcing plate 53, when there is an input from the first bracket 11 to the second bracket 51 in the left-right direction LR, the side wall plate 34 can be prevented from falling down toward the mounting plate 37. In this way, the rigidity of the second bracket 51 can be further improved by the vertical reinforcing plate 53.

Next, a third embodiment will be described with reference to FIG. In the first embodiment, a case has been described in which a plurality of link plates 38 are sandwiched between two mounting plates 36 and 37 arranged apart from each other in the vertical direction UD. On the other hand, in the third embodiment, a case will be described in which a plurality of annular plates 65 are sandwiched between three mounting plates 36, 37, and 62 arranged apart from each other in the vertical direction UD. Note that the same parts as in the first embodiment are given the same reference numerals, and the following explanation will be omitted.

FIG. 6 is a perspective view of a vibration isolator 60 in the third embodiment. The second bracket 61 of the vibration isolator 60 includes a fixing portion 31, a first plate 32, a second plate 33, a pair of side wall plates 34, a plurality of mounting plates 36, 37, 62, and a plurality of annular plates. 65.

The mounting plates 62 are flat plate-shaped portions arranged apart from each other in the upward direction U of the mounting plate 37, and are provided in a pair on the left and right sides. The mounting plate 62 is formed to have the same shape and dimensions as the mounting plate 37 facing in the vertical direction UD. That is, a mounting hole into which the bolt 39 is inserted is formed through the mounting plate 62 at a position corresponding to the mounting hole 37a of the mounting plate 37 (see FIG. 4).

The left and right inner edges of the mounting plate 62 are welded to the side wall plate 34 over substantially the entire length in the front-rear direction FB, and a weld bead 63 is formed by this welding. By this welding, the mounting plate 62 extends vertically from the side wall plate 34 in the left-right direction LR. Further, the mounting plates 36, 37 and the mounting plate 62 are arranged parallel to each other.

The annular plate 65 has the same structure as the annular plate 38a of the first embodiment, and is not connected to the connecting portion 38c. That is, the annular plate 65 is an annular member having a mounting hole 38b (see FIG. 4) formed in the center into which the bolt 39 is inserted.

A spacer in which a plurality of (four in this embodiment) annular plates 65 are stacked in the vertical direction UD is sandwiched between the mounting plates 36 and 37. Further, a spacer in which a plurality of annular plates 65 (three in this embodiment) are stacked in the vertical direction UD is sandwiched between the mounting plates 37 and 62. Thereby, similarly to the first embodiment, the portion of the second bracket 61 that is fastened with the bolt 39 can be made highly rigid, and the durability of the second bracket 61 can be improved.

Furthermore, when there is input from the first bracket 11 to the second bracket 61 in the left-right direction LR, the portions to be tensioned between the bolt 39 and the side wall plate 34 can be reduced to three mounting plates 36, 37, and 62. . In this way, the greater the number of mounting plates 36, 37, and 62, the more the rigidity of the second bracket 61 against input in the left-right direction LR can be improved, and the durability of the second bracket 61 can be further improved.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and it is readily understood that various improvements and modifications can be made without departing from the spirit of the present invention. This can be inferred. For example, the axis C of the first member 21 and the axis C of the second member 22 may be offset from each other. Further, the bolts 14, 17, and 39 may be replaced with other fastening members such as screws or rivets. Furthermore, as a method for joining each part of the second brackets 30, 51, 61, mechanical joining such as pressure welding, brazing, adhesion, screwing, etc. may be used in addition to welding.

In the above embodiment, the vibration isolator 10, 50, 60 of the present invention is an engine mount, but the present invention is not limited to this. For example, the present invention may be applied to a motor mount, a member mount, or a differential mount, or may be applied to a vibration isolator mounted on something other than a vehicle. In addition, it is not limited to the case where the first bracket 11 is attached to the vibration source side such as an engine, and the second bracket 30, 51, 61 is attached to the vibration receiving side such as the car body, but it is also possible to attach the first bracket 11 to the vibration receiving side to generate vibrations. A second bracket 30, 51, 61 may be attached to the source side.

In the above embodiment, the fixing portion 31 of the second bracket 30, 51, 61 is cylindrical, and the cylindrical second member 22 is press-fitted into the fixing portion 31. However, the present invention is not limited to this. For example, press fitting is not essential, such as fitting the fixing part 31 into the second member 22 and welding them together. Further, the fixing portion 31 and the second member 22 may be formed into an elliptical cylinder shape, or may be formed into another cylinder shape such as a rectangular cylinder shape. Note that if the fixing part 31 has an elliptical cylindrical shape, the connecting part between the fixing part 31 and the corner part 35 can be narrowed toward the side wall plate 34, as in the case where the fixing part 31 is cylindrical. The rigidity can be improved.

Further, the second member fixed to the second brackets 30, 51, 61 is replaced with the first member 21 of the above form, and the first member fixed to the first bracket 11 is replaced with the second member 22 of the above form. Also good. In this case, a hole provided in the center of the first plate 32 is used as a fixing part, and the second member (first member 21 of the above embodiment) is fixed to the fixing part with bolts 17 or the like. In addition, the tip of the arm 15 may be made into a cylindrical shape, and the first member (the second member 22 of the above configuration) may be fitted to the tip.

In the above embodiment, a case has been described in which the mounting holes 36a, 37a, 38b into which the bolts 39 are inserted are provided at two locations on each of the left and right sides of the second brackets 30, 51, 61, but the present invention is not limited to this. For example, the mounting holes 36a, 37a, and 38b may be provided at one or more positions on both the left and right sides, or the number may be different between the left and right sides. Furthermore, the plurality of mounting holes 36a, 37a, and 38b may be arranged to be shifted in the left-right direction LR on each of the left and right sides. Alternatively, the annular plate 38a and the mounting plate 37 may be overlapped on the mounting plate 36 at at least one of the parts fastened by the plurality of bolts 39, and only one of the mounting plates 36 is used for the other fastening parts.

In the first embodiment, a case has been described in which the weld bead 42 is formed in the connecting portion 38c, but the present invention is not limited to this. A weld bead 42 may be formed on the annular plate 38a. Furthermore, the annular plates 38a and the connecting portions 38c that overlap in the vertical direction UD, and the mounting plates 36 and 37 may be welded together by spot welding, projection welding, or the like. Note that these parts do not need to be welded.

In the first and third embodiments described above, a case has been described in which the spacer is formed by stacking the connecting ring plates 38 and the annular plates 65 of the same shape, but the present invention is not limited to this. For example, the connecting ring plate 38 and the annular plate 65 may be overlapped. Further, part or all of the linking plate 38 and the annular plate 65 may be replaced with those having the same shape as the mounting plates 37 and 62.

Furthermore, one or more linking plates 38, spacers 52, and annular plates 65 may be stacked on the lower surface of the mounting plate 36 of the second brackets 30, 51, and 61. Similarly, one or more linking plates 38, spacers 52, and annular plates 65 may be stacked on top of the mounting plates 37, 62.

In the above embodiment, a case has been described in which the mounting plate 36 is integrally molded with the second plate 33, but the present invention is not limited to this. For example, the mounting plate 36 may be joined to the second plate 33 (by welding, screwing, etc.), or the mounting plate 36 may be integrally molded with the side wall plate 34. Furthermore, the mounting plate 36 may be shifted in the upward direction U with respect to the second plate 33.

Alternatively, the side wall plate 34 may be extended in the downward direction D from the second plate 33, and the mounting plate 36 may be shifted in the downward direction D with respect to the second plate 33. In this case, since the portion of the second brackets 30, 51, and 61 surrounding the arm 15 floats from the vehicle body side, that portion may be turned upside down. Specifically, the first plate 32 may be connected to the lower edge side of the side wall plate 34, and the fixing portion 31 may be made to protrude in the downward direction D from the first plate 32. The same applies when the connecting plate 38 or the like is stacked on the lower surface of the mounting plate 36 and the portion surrounding the arm 15 is raised.

Some of the configurations of the above embodiments may be omitted or may be combined with each other. For example, the vertical reinforcing plate 53 in the second embodiment may be applied to the second brackets 30 and 61 in the first and third embodiments. In either embodiment, the vertical reinforcing plate 53 may be formed by bending the edges of the mounting plates 37, 62 and the side wall plate 34.

Further, in the second and third embodiments, the spacer 52 and the annular plate 65 may be joined to the mounting plates 36, 37, and 62, or the annular plates 65 may be joined to each other, as in the first embodiment. As in the first embodiment, the plurality of spacers 52 of the second embodiment may be connected by a connecting portion. Further, the mounting plates 36, 37, 62, etc. on either the left or right side may be omitted.

10, 50, 60 vibration isolator 11 first bracket 15 arm 20 vibration isolator main body 21 first member 22 second member 23 vibration isolator base 30, 51, 61 second bracket 31 fixed part 32 first plate 33 second plate 34 Side wall plate 35 Corner 36, 37, 62 Mounting plate 36a, 37a, 38b Mounting hole 38 Linking plate 38a, 65 Annular plate 38c Connecting part 39 Bolt (fastening member)
52 Spacer 53 Vertical reinforcing plate FB Front-rear direction (first direction)
U-D Vertical direction (second direction)
L-R Left and right direction (third direction)

Claims (7)

a vibration isolating device main body in which a first member and a second member are connected by a vibration isolating base made of an elastic body;
a first bracket having an arm extending in a first direction to which the first member is fixed, and attached to one of a vibration source side and a vibration receiving side;
a second bracket fastened to the other of the vibration source side and the vibration receiving side with a fastening member;
The second bracket includes a fixing part to which the second member is fixed;
a first plate provided with the fixing part;
a second plate facing the first plate with the arm sandwiched therebetween in a second direction perpendicular to the first direction;
a pair of side wall plates facing each other across the arm in a third direction perpendicular to the first direction and the second direction and connecting the first plate and the second plate;
a plurality of mounting plates that respectively extend from the side wall plate in the third direction and are spaced apart from each other in the second direction;
a spacer sandwiched in the second direction between the plurality of mounting plates;
The vibration isolator is characterized in that a mounting hole into which the fastening member is inserted is formed in a portion where the mounting plate and the spacer overlap each other in the second direction. The vibration isolator according to claim 1, wherein at least one of the plurality of mounting plates spaced apart in the second direction is located at a position overlapping the arm when viewed from the third direction. The first plate and the side wall plate have edges connected to each other at curved corners,
The fixing part is formed in a cylindrical shape or an elliptical cylindrical shape that protrudes from the first plate and the corner part to a side opposite to the second plate and into which the second member fits,
2. The vibration isolator according to claim 1, wherein a dimension of a connecting portion between the fixing portion and the corner portion in the first direction decreases toward the side wall plate. 2. The vibration isolator according to claim 1, wherein the second bracket includes a vertical reinforcing plate that stands up vertically from the side wall plate and the mounting plate. 5. The vibration isolator according to claim 1, wherein the spacer is formed by stacking a plurality of annular plates in the second direction with the mounting hole provided in the center. The mounting plate is provided with a plurality of mounting holes,
The spacer includes a plurality of connected ring plates stacked in the second direction in which the ring plates separated in at least one of the first direction and the third direction are connected by connecting portions so as to correspond to the plurality of mounting holes. The vibration isolating device according to claim 5, wherein the vibration isolating device is formed. The vibration isolator according to claim 6, wherein the connecting portions that overlap in the second direction are joined to each other, and the connecting portion is joined to the mounting plate.

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