JP2015217817A - bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket that can easily increase the primary natural frequency in the vertical direction of a vehicle while ensuring the mechanical strength of the bracket.SOLUTION: In leg parts 21, 31 one end of each of which is connected to the second mounting fixture 42 of a mounting device 40, mounting seat parts 24, 34 continuously formed at the other end are mounted on a vehicle-body-side member. The mounting seat parts 24, 34 are bent in a direction intersecting the extending directions of the leg parts 21, 31 as viewed in the vertical direction of the vehicle (the U-D directions indicated by the arrows). Therefore, compared to a bracket in which mounting seat parts 24, 34 are not bent, the bracket can improve its rigidity in the vertical direction of the vehicle. Accordingly, with a simple configuration in which the mounting seat parts 24, 34 are bent, the primary natural frequency in the vertical direction of the vehicle can be increased while ensuring the mechanical strength of this bracket.

Description

  The present invention relates to a bracket, and more particularly to a bracket that can easily increase the primary natural frequency of a vehicle in the vertical direction while ensuring mechanical strength.

  For example, a mount device (anti-vibration device) that suppresses transmission of vibration from the vibration source to the vehicle body side (the main vibration input direction is the vehicle vertical direction) is provided between the automobile body and the engine or other vibration source. . The mounting device is attached between the vibration source side member and the vehicle body side member by a bracket (Patent Document 1). In order to prevent the bracket from resonating with the vibration of the vibration source, the primary natural frequency in the vehicle vertical direction is increased by reducing the weight and increasing the rigidity.

Japanese Patent Laid-Open No. 11-278064

  However, in the conventional techniques described above, generally, when the rigidity of the bracket is increased, the mass increases and the natural frequency tends to decrease, and when the bracket is reduced in weight, the mechanical strength tends to decrease. For this reason, it has been difficult to increase the frequency of the primary natural frequency in the vehicle vertical direction while ensuring the mechanical strength of the bracket.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a bracket capable of easily increasing the primary natural frequency of the vehicle in the vertical direction while ensuring the mechanical strength.

Means for Solving the Problems and Effects of the Invention

  In order to achieve this object, according to the bracket of the first aspect, the first fixture and the second fixture are arranged apart from each other, and the vibration-proof base composed of a rubber-like elastic body is the first fixture. And a second mounting tool, a mount device that suppresses transmission of vibration of the vibration source to the vehicle body is configured. The leg portion whose one end is connected to the first fixture or the second fixture of the mounting device has the other end side extended in a predetermined direction, and the attachment seat portion coupled to the other end side of the leg portion vibrates. It is attached to the source side member or the vehicle body side member. Since the mounting seat is bent in a direction intersecting with the extending direction of the leg in the vehicle vertical direction view, the leg and the mounting seat in the vehicle vertical direction are compared with the bracket in which the mounting seat is not bent. Stiffness can be increased. Therefore, there is an effect that the primary natural frequency in the vertical direction of the vehicle can be increased with a simple configuration in which the mounting seat portion is bent while ensuring the mechanical strength.

  According to the bracket of the second aspect, at least the contact portion located on the other end side of the leg portion contacts the vibration source side member or the vehicle body side member. Since the mounting seat part contacts the vibration source side member or the vehicle body side member together with the contact part, the rigidity in the vehicle vertical direction can be further increased and the amplitude of the leg part can be reduced as compared with a bracket having no contact part. it can. When the amplitude of the leg portion increases, a problem such as a new vibration may occur due to the increase, and this can be prevented. In addition to the effect of claim 1, there is an effect of suppressing the deterioration of the damping performance. .

  According to the bracket of claim 3, the leg portion is formed such that the pair of first ribs erected on the edge portions on both sides along the extending direction are continuously formed along the extending direction of the leg portion. Therefore, also when a leg part is formed with a lightweight plate-shaped member, the bending rigidity of a leg part is securable. Therefore, in addition to the effect of the first or second aspect, there is an effect that the leg portion can be reduced in weight while securing rigidity and increasing the primary natural frequency in the vehicle vertical direction.

  According to the bracket of the fourth aspect, in the mounting seat portion, the pair of second ribs respectively coupled to the pair of first ribs are erected on the edge on both sides along the bending direction. Therefore, even when the mounting seat portion is formed of a lightweight plate-like member, the bending rigidity of the mounting seat portion can be ensured. Therefore, in addition to the effect of the third aspect, there is an effect that the mounting seat portion can be reduced in weight while securing rigidity and increasing the primary natural frequency in the vehicle vertical direction.

  According to the bracket of claim 5, the pair of first ribs and second ribs are the lengths of the first rib and the second rib located on the bent outer side of the leg portion and the mounting seat portion in the vehicle vertical direction view. However, the length of the other first rib and the second rib located on the inner side of the bend is set larger than the length in the vehicle vertical direction view. For this reason, it is possible to suppress a decrease in rigidity on the edge side located on the bent outer side of the leg portion and the mounting seat portion by the first rib and the second rib whose length in the vehicle vertical direction view is set large. Therefore, in addition to the effect of the fourth aspect, there is an effect that the primary natural frequency in the vehicle vertical direction can be surely increased in frequency.

It is a top view of the mount apparatus (vibration isolator) with which the bracket in one embodiment of this invention was attached. It is an axial sectional view of the vibration isolator taken along line II-II in FIG. It is a front view of a bracket. It is a side view of the bracket in the arrow IV direction view of FIG. It is a side view of the bracket in the arrow V direction view of FIG. (A) is a top view of the bracket in the arrow VIa direction view of FIG. 3, (b) is a plan view of the bracket in the arrow VIb direction view of FIG. It is a figure which shows the relationship between a frequency and inertance.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a mounting device 10 (anti-vibration device 1) to which a bracket 10 according to an embodiment of the present invention is attached, and FIG. 2 is an axial direction of the anti-vibration device 1 along the line II-II in FIG. FIG. 3 is a front view of the bracket 10. Note that arrows UD, LR, and FB in FIGS. 1 to 3 indicate the vertical direction, the horizontal direction, and the front-rear direction of the vehicle on which the vibration isolator 1 is mounted. FIG. 2 shows a state in which a predetermined shared load is applied to the mounting apparatus 10.

  As shown in FIG. 1, the vibration isolator 1 supports and fixes a vibration source (not shown) of a power unit or the like (engine or the like) of an automobile, and generates vibration generated by the vibration source (vehicle body side member M, FIG. 2). The bracket 10 attached to the vehicle body side member M, the mount device 40 connected to the bracket 10, and the vibration on the power unit side connected to the mount device 40. And a vibration source side bracket 50 attached to a source side member (not shown).

  As shown in FIG. 2, the mounting device 40 is spaced apart from the first fitting 41 made of metal, such as an aluminum alloy, which is formed in a conical shape tapered downward, with respect to the first fitting 41. A second fixture 42 arranged coaxially, and a vibration isolating base 43 that connects the second fixture 42 and the first fixture 41 and is made of a rubber-like elastic body are provided.

  In the first fixture 41, the upper surface (upper side surface in FIG. 2) serving as the mounting surface of the vibration source side bracket 50 is formed as a flat end surface, and the vibration-proof base 43 is vulcanized and bonded to the outer peripheral surface and the lower surface. A female thread portion extending along the axis is formed at the center of the upper surface of the first fixture 41, and the vibration source side bracket 50 is attached to the first fixture 41 by a bolt B screwed to the female thread portion. Fastened and fixed to.

  The second fixture 42 is a cylindrical member made of metal such as a steel material, and the vibration-proof base 43 is vulcanized and bonded to the inner peripheral surface. The second fixture 42 is fixed to the fixing portion 11 (described later) of the bracket 10. A diaphragm 44 is attached to the lower end opening of the second fixture 42, thereby forming a liquid enclosure chamber in which a liquid such as ethylene glycol is enclosed between the diaphragm 44 and the vibration isolation base 43. The liquid sealing chamber is partitioned by a partition 45 into a first liquid chamber 46 on the vibration isolating base 43 side and a second liquid chamber 47 on the diaphragm 44 side, and the first liquid chamber 46 and the second liquid chamber 47 are partitioned. The orifices 48 formed along the outer periphery of the body 45 communicate with each other.

  The vibration side bracket 50 is a connecting member made of metal such as an aluminum alloy for connecting the first fixture 41 of the mounting device 40 to a vibration source side member (not shown) on the power unit side. The vibration side bracket 50 is fastened and fixed to the upper surface (upper side surface in FIG. 2) of the first fixture 41 of the mounting device 40 by a bolt B.

  On the top surface (the front side surface in FIG. 1 and the upper side surface in FIG. 2) of the vibration source side bracket 50, a bolt fixing portion 51 having a circular shape in plan view is recessed toward the bottom surface, and at the center of the bottom surface of the bolt fixing portion 51. A bolt insertion hole 52 having a circular shape in plan view through which the shaft portion of the bolt B is inserted is formed concentrically. The bottom surface of the bolt fixing portion 51 is a seating surface of the head of the bolt B. The vibration source side bracket 50 can be reduced in weight as much as the bolt fixing portion 51 is recessed.

  The root portion 53 of the vibration source side bracket 50 is provided with a plurality of mounting holes 54. The base part 53 is attached to the power unit side (vibration source side member) by inserting bolts protruding from the power unit side into the attachment holes 54 and fastening these bolts with nuts. Thus, in the mount device 40, the input direction of the main vibration by the power unit is set in the vehicle up-down direction (arrow UD direction).

  The stopper member 60 is a bottomed cylindrical body vulcanized and molded from a rubber-like elastic body separately from the vibration source side bracket 50, and the vibration source side bracket 50 is inserted into the cylindrical body from the tip side. Thus, the outer surface of the vibration source side bracket 50 is covered. Thereby, the impact when the displacement of the vibration source side bracket 50 is regulated by the displacement regulating part 12 (described later) of the bracket 10 is alleviated.

  The bracket 10 is a metal member that is connected to the mounting device 40 and is attached to the vehicle body side member M. The fixing portion 11 that is externally fitted to the second fixture 42 of the mounting device 40, and the fixing portion 11 A gate-shaped displacement restricting portion 12 extending upward (in the direction of arrow U), and a first portion that is disposed at a substantially symmetrical position across the fixed portion 11 and is attached to the vehicle body side member M An attachment part 20 and a second attachment part 30 are provided. The fixing part 11 is a cylindrical part into which the second fixture 42 is fitted on the inner peripheral side.

  The displacement restricting portion 12 is a substantially C-shaped member as viewed in the vehicle left-right direction (the vertical direction in FIG. 2) for restricting the displacement of the vibration source side bracket 50, and both ends are fixed at symmetrical positions on the outer periphery of the fixing portion 11. Is done. The displacement restricting portion 12 has an opening 12a formed laterally (perpendicular to FIG. 2, in the direction of the arrow LR) so as to cover the outer surface of the vibration-side bracket 50 inserted through the opening 12a. It is formed.

  That is, the inner surface of the displacement restricting portion 12 surrounds each surface with a space between the upper surface (upper side surface in FIG. 2) and both side surfaces (left and right surfaces in FIG. 2) of the vibration side bracket 50. In the present embodiment, the displacement restricting portion 12 is disposed above the vibration-side bracket 50 (in the direction of arrow U) and in the vehicle front-rear direction (in the direction of arrow FB). Therefore, when large amplitude vibration is input from the power unit to the vibration isolator 1, the portion surrounded by the displacement restricting portion 12 of the bracket 10 is brought into contact with the inner surface of the displacement restricting portion 12, thereby 2 The relative displacement of the vibration side bracket 50 with respect to the fixture 42 is restricted.

  In the displacement restricting portion 12, a pair of reinforcing ribs 13 are provided upright at edge portions on both sides in the width direction (arrow LR direction). The reinforcing rib 13 is integrally formed with the displacement restricting portion 12 and extends continuously in the longitudinal direction. A circular opening 14 having an inner diameter through which the head of the bolt B can be inserted is formed on the upper surface of the displacement restricting portion 12.

  As shown in FIG. 3, the bounce regulating member 15 located between the upper end of the fixed portion 11 and the vibration side bracket 50 (see FIG. 2) is fixed to the opening 12 a of the displacement regulating portion 12. The bouncing restriction member 15 restricts the displacement of the vibration side bracket 50 in the lower direction (arrow D direction).

  The first attachment part 20 and the second attachment part 30 are members whose one end is connected to the fixing part 11 and the displacement restricting part 12 and whose other end is attached to the vehicle body side member M. In the present embodiment, one end of the first attachment portion 20 is connected to the vehicle rear side portion of the fixed portion 11 and the displacement restricting portion 12, and the other end side extends in the vehicle rear direction (arrow B direction). One end of the second attachment portion 30 is connected to the front portion of the fixed portion 11 and the displacement restricting portion 12, and the other end side extends to the front of the vehicle (in the direction of arrow F).

  Returning to FIG. The first attachment portion 20 is connected to the second attachment 42 via the fixing portion 11 at one end 22a, and is connected to the other end side of the leg portion 21 and attached to the vehicle body side member M. The mounting seat part 24 is provided. The mounting seat portion 24 (see FIG. 1) is bent to the vehicle right side (arrow R direction) that intersects the extending direction of the leg portion 21 (arrow B direction) when viewed in the vehicle vertical direction (arrow UD direction). . In this Embodiment, the 1st attachment part 20 is integrally formed by press molding of plate-shaped members, such as a hot rolled steel plate and a cold rolled steel plate.

  The leg portion 21 is a portion for preventing the bracket 10 from tilting backward (in the direction of arrow B) when the vehicle is accelerated forward, and a base end portion 22 located on the mounting device 40 side, and a base end portion 22 And a contact portion 23 that is located on the vehicle rear side and contacts the vehicle body side member M. The base end portion 22 is inclined downward so that one end 22 a abuts against the outer peripheral surface of the fixed portion 11, the other end side is bent, and gradually approaches the vehicle body side member M. The contact portion 23 is a portion that is coupled to the mounting seat portion 24, and the lower surface contacts the vehicle body side member M together with the mounting seat portion 24. The mounting seat portion 24 is a portion fixed to the vehicle body side member M, and is formed with an insertion hole 24a through which a shaft-like member (not shown) such as a bolt is inserted.

  The description of the first attachment portion 20 will be continued with reference to FIGS. 4 and 6B. 4 is a side view of the bracket 10 as viewed in the direction of arrow IV in FIG. 3, and FIG. 6B is a plan view of the bracket 10 (first attachment portion 20) as viewed in the direction of arrow VIb in FIG. As shown in FIGS. 4 and 6 (b), the base end portion 22 is formed in a straight line toward the rear of the vehicle (in the direction of arrow B), and as shown in FIG. The seat 24 is bent to the right side of the vehicle (upper side of FIG. 6B) intersecting the base end 22 in the vertical direction of the vehicle (viewed in the vertical direction in FIG. 6B) (see FIG. 1). .

  As shown in FIG. 4, the first attachment portion 20 includes first ribs 25 a and 25 b and a first rib at the edges on both sides along the extending direction of the leg portion 21 and the mounting seat portion 24 (front side in FIG. 4). Two ribs 26 a and 26 b are erected, and are formed continuously along the extending direction of the leg portion 21 and the mounting seat portion 24. Thereby, while being able to form the leg part 21 and the attachment seat part 24 with a lightweight plate-shaped member, the bending rigidity of the leg part 21 and the attachment seat part 24 is securable.

  The first ribs 25a coupled to the second ribs 26a erected along the edge of the mounting seat portion 24 on the bent outer side (arrow L side) are arranged on the mounting seat portion 24 on the bent inner side (arrow R side). The vehicle vertical direction (arrow UD direction) height is set larger than the 1st rib 25b connected with the 2nd rib 26b standingly arranged along the edge. Thereby, the rigidity of the leg 21 on the left side (arrow L side) of the vehicle on which the first rib 25b is erected can be made larger than the rigidity of the leg 21 on the right side (arrow R side) of the vehicle.

  Further, the second rib 26b erected along the edge of the mounting seat portion 24 on the bent inner side (arrow R side) is erected along the edge of the mounting seat portion 24 on the bent outer side (arrow L side). The height in the vehicle vertical direction (arrow UD direction) is set larger than the second rib 26a. As a result, the rigidity on the bent inner side (arrow R side) of the mounting seat portion 24 and the contact portion 23 can be made larger than the rigidity on the bent outer side (arrow L side). The bending inner side (arrow R side) of the mounting seat portion 24 and the contact portion 23 is more susceptible to large bending stress than the outer bending side (arrow L side). However, the second rib 26b can ensure bending rigidity and be deformed. Can be prevented.

  As shown in FIG. 6B, the first ribs 25a and 25b and the second ribs 26a and 26b are viewed in the vehicle vertical direction of the first ribs 25a and the second ribs 26a located on the bent outer side of the first attachment portion 20, respectively. The length in FIG. 6B (viewed in the direction perpendicular to the plane of the paper) is set to be larger than the length of the first rib 25b and the second rib 26b located on the bent inner side in the vehicle vertical direction. Thereby, it can suppress that the rigidity of the edge side located in the bending outer side of the leg part 21 and the attachment seat part 24 falls by the 1st rib 25a and the 2nd rib 26a.

  Note that the bending angle of the mounting seat portion 24 with respect to the leg portion 21 when viewed in the vehicle vertical direction is preferably set in the range of 10 to 60 ° when the bending angle when not bent is 0 °. This is because if the bending angle is smaller than 10 ° or larger than 60 °, the effect of increasing the rigidity of the leg portion 21 and the mounting seat portion 24 in the vehicle vertical direction is reduced.

  Returning to FIG. The second attachment portion 30 is connected to the second attachment 42 via the fixing portion 11 at one end 32a, is connected to the other end side of the leg portion 31, and is attached to the vehicle body side member M. The mounting seat part 34 is provided. The mounting seat portion 34 (see FIG. 1) is bent to the vehicle right side (arrow R direction) that intersects the extending direction of the leg portion 31 (arrow F direction) in the vehicle vertical direction (arrow UD direction). . In this Embodiment, the 2nd attachment part 30 is integrally formed by press molding of plate-shaped members, such as a hot rolled steel plate and a cold rolled steel plate.

  The leg 31 is a part for preventing the bracket 10 from tilting backward (arrow B direction) during forward acceleration of the vehicle and preventing the bracket 10 from moving forward (arrow F direction) during forward deceleration of the vehicle. And a base end portion 32 located on the mounting device 40 side, and a contact portion 33 located on the vehicle front side of the base end portion 32 and in contact with the vehicle body side member M. One end 32 a of the base end portion 32 is attached to the outer peripheral surface of the fixed portion 11, and the other end side extends toward the vehicle lower side (arrow D direction). The contact portion 33 is a portion that is coupled to the mounting seat portion 34, is bent approximately 90 ° with respect to the base end portion 32, and extends toward the front of the vehicle (in the direction of arrow F). The lower surface of the contact portion 33 contacts the vehicle body side member M together with the mounting seat portion 34. The mounting seat portion 34 is a portion fixed to the vehicle body side member M, and is formed with an insertion hole 34a through which a shaft-like member (not shown) such as a bolt is inserted.

  The description of the second attachment portion 30 will be continued with reference to FIG. 5 and FIG. 5 is a side view of the bracket 10 as viewed in the direction of arrow V in FIG. 3, and FIG. 6A is a plan view of the bracket 10 (second attachment portion 30) as viewed in the direction of arrow VIa in FIG. As shown in FIGS. 5 and 6A, the base end portion 32 is formed in a straight line toward the front of the vehicle (in the direction of arrow F), and as shown in FIG. The vehicle is bent to the right side of the vehicle (upper side of FIG. 6A) intersecting with the portion on the base end portion 32 side of the contact portion 33 when viewed in the vertical direction of the vehicle (viewed in the vertical direction in FIG. 6A). 1).

  As shown in FIG. 5, the second attachment portion 30 includes first ribs 35 a and 35 b and a first rib at the edges on both sides along the extending direction of the leg portion 31 and the mounting seat portion 34 (front side in FIG. 5). Two ribs 36a and 36b are erected, and are formed continuously along the extending direction of the leg portion 31 and the mounting seat portion 34. Thereby, while being able to form the leg part 31 and the attachment seat part 34 with a lightweight plate-shaped member, the bending rigidity of the leg part 31 and the attachment seat part 34 is securable.

  The first rib 35a coupled to the second rib 36a standing along the edge of the mounting seat 34 on the bent outer side (arrow L side) is formed on the mounting seat 34 on the bent inner side (arrow R side). The vehicle vertical direction (arrow UD direction) height is set larger than the 1st rib 35b connected with the 2nd rib 36b standingly arranged along an edge. Thereby, the rigidity of the leg part 31 on the vehicle left side (arrow L side) on which the first rib 35b is erected can be made larger than the rigidity of the leg part 31 on the vehicle right side (arrow R side).

  Further, the second rib 36b erected along the edge of the mounting seat 34 on the bent inner side (arrow R side) is erected along the edge of the mounting seat 34 on the bent outer side (arrow L side). The height in the vehicle vertical direction (arrow UD direction) is set larger than the second rib 36a. As a result, the rigidity on the bent side (arrow R side) of the mounting seat part 34 and the contact part 33 can be made larger than the rigidity on the bent side (arrow L side). The bending inner side (arrow R side) of the mounting seat part 34 and the contact part 33 is more susceptible to large bending stress than the outer bending side (arrow L side), but the second rib 36b can ensure bending rigidity and be deformed. Can be prevented.

  As shown in FIG. 6A, the first ribs 35a and 35b and the second ribs 36a and 36b are viewed in the vehicle vertical direction of the first ribs 35a and the second ribs 36a located on the bent outer side of the second attachment portion 30, respectively. The length in FIG. 6 (a) as viewed in the direction perpendicular to the plane of the paper is set to be larger than the length of the first rib 35b and the second rib 36b located on the bent inner side in the vehicle vertical direction. Thereby, it can suppress that the rigidity of the edge side located in the bending outer side of the leg part 31 and the attachment seat part 34 falls by the 1st rib 35a and the 2nd rib 36a.

  In addition, the bending angle of the mounting seat portion 34 with respect to the leg portion 31 when viewed in the vehicle vertical direction is preferably set in the range of 10 to 60 °, where the bending angle when not bent is 0 °. This is because when the bending angle is smaller than 10 ° or larger than 60 °, the effect of increasing the rigidity in the vehicle vertical direction of the leg portion 31 and the mounting seat portion 34 is lowered.

  According to the bracket 10, the mounting seats 24 and 34 intersect the extending direction of the legs 21 and 31 (vehicle longitudinal direction, arrow FB direction) when viewed in the vehicle vertical direction (arrow UD direction). Therefore, the rigidity of the leg portions 21 and 31 and the mounting seat portions 24 and 34 in the vehicle vertical direction can be increased as compared with a conventional bracket in which the mounting seat portion is not bent. Therefore, with a simple configuration in which the mounting seats 24 and 34 are bent, the primary natural frequency in the vehicle vertical direction is increased while the mechanical strength of the first mounting part 20 and the second mounting part 30 is ensured. it can.

  Further, the leg portions 21 and 31 whose one ends 22a and 32a are fixed to the fixed portion 11 have contact portions 23 and 32 positioned on the other end side in contact with the vehicle body side member M, and the mounting seat portions 24 and 34 are It contacts the vehicle body side member M together with the contact portions 23 and 33. The other end side (side separated from the mounting device 40) of the contact portions 23 and 33 is coupled to the mounting seat portions 24 and 34 while being bent in a direction intersecting in the vehicle vertical direction view. As a result, the rigidity in the vehicle vertical direction (arrow UD direction) can be further increased and the amplitude of the leg portions 21 and 31 can be reduced as compared with the conventional bracket in which the contact portion is not bent. If the amplitudes of the leg portions 21 and 31 are increased, a problem such as a new vibration may occur due to the increase, and this can be prevented, so that deterioration of the damping performance of the mounting device 40 can be suppressed.

  Next, with reference to FIG. 7, the experimental result which confirmed the effect of the bracket 10 (refer FIG. 3) is demonstrated. In this experiment, the mounting seats 24 and 34 of the bracket 10 (which does not hold the mounting device 40) are mounted on a vibration table (not shown), and the vertical direction (arrow UD) applied to the mounting seats 24 and 34 is shown. The vibration level (inertance A / F) of the rigid body resonance is measured with F as the excitation force in the direction) and A as the acceleration generated in the reinforcing rib 13 (point P in FIG. 3).

  FIG. 7 is a diagram showing the relationship between frequency and inertance. The horizontal axis represents frequency and the vertical axis represents inertance, which indicates that the frequency or inertance increases toward the right or upper side of the axis. For comparison, the brackets (the mounting seats 24 and 34 are not bent) are the same in the extending direction of the legs 21 and 31 and the mounting seats 24 and 34 (vehicle longitudinal direction, arrow FB direction). Also measured the vibration level (inertance) of rigid resonance of the same bracket 10 (example) (comparative example).

  As shown in FIG. 7, in the example (solid line), it was found that the frequency indicating the maximum peak of inertance (vibration level) appears on the high frequency side as compared with the comparative example (broken line). From this experiment, the bracket according to the embodiment has a simple configuration in which the mounting seats 24 and 34 are bent in a direction intersecting when viewed in the vehicle vertical direction, and the primary natural frequency in the vehicle vertical direction while ensuring mechanical strength. It became clear that the frequency can be increased.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  In the said embodiment, although the bracket 10 attached to the vehicle body side member M was demonstrated, it is not necessarily restricted to this. Of course, the present invention can be applied to a bracket (vibration source side bracket 50) attached to the vibration source side such as a power unit. In that case, a mounting seat portion attached to a vibration source side member (not shown) such as a power unit is bent in a direction intersecting with the extending direction of the leg portion in the vehicle vertical direction.

  In the above-described embodiment, the case where the liquid-filled vibration isolator is used as the mount device 40 has been described as an example, but the present invention is not necessarily limited thereto. For example, it is naturally possible to employ a mounting device in which the liquid seal portion is omitted. In this case, the mounting device can be an elastic member having an appropriate shape such as a cylindrical shape or a block shape.

  Although the said embodiment demonstrated the case where the leg parts 21 and 31 of the bracket 10 were extended in the vehicle front-back direction (arrow FB direction), it is not necessarily restricted to this, The vehicle left-right direction ( Of course, it is possible to set the extending direction of the legs 21 and 31 in an arbitrary direction according to the direction in which the large displacement is input (arrow LR direction).

  In the above-described embodiment, the mounting seats 24 and 34 of the bracket 10 intersect in the same direction (vehicle right side, arrow R direction) with respect to the extending direction of the legs 21 and 31 (vehicle longitudinal direction, arrow FB direction). ) Was explained. However, the present invention is not necessarily limited to this, and it is naturally possible to bend one of the mounting seats 24 and 34 to the vehicle right side (arrow R direction) and the other to the vehicle left side (arrow L direction). In addition, contrary to the bending direction in the above-described embodiment, it is naturally possible to bend the mounting seat portions 24 and 34 to the vehicle left side (arrow L direction).

  In the above embodiment, the leg portions 21 and 31 of the bracket 10 are bent in the vehicle vertical direction from the base end portions 22 and 32 to the contact portions 23 and 33 toward the vehicle body side member M in an S shape or L shape. However, the present invention is not necessarily limited to this. The height of a part of the vehicle body side member M is increased to the height of the ends 22a and 32a where the base end portions 22 and 32 are fixed to the second fixture 42, and the contact portions 23 and 33 are formed on the raised portions of the vehicle body side member M. Therefore, it is not necessary to bend the leg portions 21 and 31 from the base end portions 22 and 32 to the contact portions 23 and 33.

  In the above-described embodiment, the vibration isolator bracket for elastically supporting the automobile engine has been described. However, the present invention is not limited to this, and is applicable to various vibration isolator brackets such as body mounts and differential mounts. Is of course possible.

DESCRIPTION OF SYMBOLS 10 Bracket 40 Mounting apparatus 41 1st fixture 42 2nd fixture 43 Anti-vibration base | substrate 21, 31 Leg part 23, 33 Contact part 24, 34 Mounting seat part 25a, 25b, 35a, 35b 1st rib 26a, 26b, 36a 36b Second rib M Car body side member

Claims (5)

A first mounting tool and a second mounting tool that are spaced apart from each other; a vibration isolating base interposed between the first mounting tool and the second mounting tool and made of a rubber-like elastic body; A leg portion having one end connected to the first fixture or the second fixture of the mount device that suppresses transmission of vibration of the vibration source to the vehicle body side, and the other end extending in a predetermined direction. ,
A mounting seat portion coupled to the other end side of the leg portion and attached to the vibration source side member or the vehicle body side member;
The bracket, wherein the mounting seat portion is bent in a direction intersecting with the extending direction of the leg portion when viewed in the vehicle vertical direction. The leg portion includes a contact portion that contacts the vibration source side member or the vehicle body side member at least on the other end side,
The bracket according to claim 1, wherein the mounting seat portion contacts the vibration source side member or the vehicle body side member together with the contact portion.   The leg portion is provided with a pair of first ribs that are erected on both side edges along the extending direction and continuously formed along the extending direction of the leg portion. The bracket according to claim 1 or 2.   The mounting seat portion includes a pair of second ribs that are coupled to the pair of first ribs, and that are respectively erected on both edges along a bending direction. 3. Bracket according to 3.   The pair of first ribs and second ribs are such that the length of one of the first ribs and the second ribs located on the bent outer side of the leg portion and the mounting seat portion in the vehicle vertical direction is on the bent inner side. The bracket according to claim 4, wherein the other first rib and the second rib that are positioned are set to be longer than the length in the vehicle vertical direction view.

Images