JP2015212122A - Vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proof device which suppresses vibration transmission in a vehicle vertical direction when a stopper part is actuated, and stabilizes a posture of a mounting device.SOLUTION: A stopper part 50 constituted from a rubber-like elastic body is interposed between a first regulation part 31 and a bracket member 20. The stopper part 50 has a projection part 52 which is disposed at an end of one side of a leg part 51 in a vehicle longitudinal direction, and the projection part 52 projects from the end to the one side in the vehicle longitudinal direction and to both sides in a vehicle vertical direction. Two bored parts 54 are formed that are open respectively to both sides in the vehicle vertical direction and that have a bottom with a depth reaching the leg part 51. When the stopper part 50 is actuated, the leg part 51 mainly undergoes shear deformation with respect to vibration input in the vehicle vertical direction, and therefore vibration transmission in the vehicle vertical direction is suppressed. Further, a posture of a mounting device 10 is stabilized when the two bored parts 54 collapse.

Description

  The present invention relates to an anti-vibration device, and more particularly to an anti-vibration device that can suppress vibration transmission in a vehicle vertical direction when a stopper portion is actuated and can stabilize the posture of a mounting device.

  As a vibration isolator that supports a power unit such as an engine on a vehicle body, for example, a vibration isolator disclosed in Patent Document 1 is known. The vibration isolator disclosed in Patent Document 1 is interposed between a first fixture attached to the power unit side, a second fixture attached to the vehicle body side, and the first fixture and the second fixture. A mounting device (insulator) including a vibration isolating base. Furthermore, the vibration isolator is composed of a displacement restricting portion (stopper fitting) that is fixed to the second fixture of the mount device and restricts the displacement of the first fixture in the vehicle longitudinal direction, and a rubber-like elastic body. And a stopper portion (elastic stopper) interposed between the displacement restricting portion and the first fixture. The stopper portion is positioned on the vehicle upper side with respect to the vibration isolation base of the mount device, and has a bottomed straight portion (hollow portion) that opens to the vehicle lower side. The main vibration input direction of the mount device is the vehicle vertical direction.

  According to this vibration isolator, when the first fixture moves in the vehicle front-rear direction and the stopper portion starts to deform, the straight portion starts to collapse. Since the rigidity of the stopper portion is partially reduced by the curving portion, it is possible to suppress an increase in the dynamic spring constant with respect to vibration input in the vehicle vertical direction, which is the main vibration, and to suppress transmission of vibration to the vehicle body. The stopper is located on the upper side of the vehicle with respect to the vibration isolator base of the mount device, and the curled portion opens to the lower side of the vehicle. Is done. When the curled portion is completely crushed, the static spring constant is abruptly increased mainly by compressive deformation, and the displacement of the first fixture is reliably restricted.

JP 2009-299782 A (particularly FIG. 2)

  However, the above-described technique has a problem that the posture of the mount device becomes unstable because a load in the twisting direction is input to the vibration-proof base when the straight portion is crushed. In addition, since the straight part of the stopper part opens to the lower side of the vehicle, when the stopper part is restored, a reaction force (reaction force in the twisting direction) that restores the deformed anti-vibration base body when a load in the twisting direction is input. Could not occur. For this reason, there is a problem that the posture of the mounting device becomes unstable when the stopper portion is restored.

  The present invention has been made to solve the above-described problem, and provides a vibration isolator capable of suppressing vibration transmission in the vehicle vertical direction when the stopper portion is operated and stabilizing the posture of the mount device. It is an object.

Means for Solving the Problems and Effects of the Invention

  In order to achieve this object, according to the vibration isolator according to claim 1, the mounting device includes a first fixture attached to the power unit side, a second fixture attached to the vehicle body side, and a first fixture. A bracket member that is interposed between the second fixture and includes an anti-vibration base made of a rubber-like elastic body and is fixed to the power unit is attached to the first fixture. A displacement restricting portion for restricting displacement of the first fixture and the bracket member in the vehicle front-rear direction is fixed to the second fixture, and a stopper portion made of a rubber-like elastic body is provided as the displacement restricting portion and the first fixture. Or it is interposed between the displacement restricting portion and the first fixture or the bracket member while being attached to the bracket member.

  As for the stopper part, a leg part protrudes to the vehicle longitudinal direction one side. A protrusion is provided at an end of the leg on one side in the vehicle front-rear direction, and the protrusion protrudes from the end to one side in the vehicle front-rear direction and both sides in the vehicle up-down direction. Two bottomed straight portions having a depth that opens to both sides of the vehicle in the vertical direction and reaches the legs are formed.

  When the first fixture and the bracket member move in the vehicle front-rear direction and the stopper portion starts to deform, the straight portion starts to be crushed. Since the leg portion is mainly subjected to shear deformation with respect to the vibration input in the vehicle vertical direction at this time, an increase in the dynamic spring constant with respect to the vibration input in the vehicle vertical direction can be suppressed. Therefore, there is an effect that vibration transmission to the vehicle body when the stopper portion is operated can be suppressed.

  On the other hand, when the first fixture and the bracket member move in the longitudinal direction of the vehicle and the stopper portion starts to deform, the straight portions that open on both sides of the vertical direction of the vehicle are crushed, and the leg portion and the protruding portion are compressed and deformed. . As a result, it is possible to suppress the load in the twisting direction that is input to the vibration-proof base of the mounting device when the two straight portions are crushed. Thereby, there exists an effect which can stabilize the attitude | position of a mounting apparatus. Furthermore, there is an effect that the displacement of the mount device can be stabilized by utilizing a reaction force when the leg portion and the protruding portion are restored.

  According to the vibration isolator of claim 2, the stopper portion includes a region in which the first fixture or the bracket member provided with the leg portion is projected in the vehicle front-rear direction, and a region in which the displacement restricting portion is projected in the vehicle front-rear direction. Legs are arranged in the region where the two overlap. As a result, the reaction force when the leg portion and the projecting portion are restored can be reliably applied to the first fixture or the bracket member provided with the leg portion. Therefore, in addition to the effect of the first aspect, there is an effect that the posture of the mounting device can be further stabilized.

  According to the vibration isolator of claim 3, since the two straight portions are opened on both sides in the vehicle left-right direction, the vibration input in the vehicle vertical direction is compared with the case where the straight portions are not opened on both sides in the vehicle left-right direction. In contrast, the leg can be easily sheared and deformed. As a result, it is possible to increase the effect of suppressing an increase in the dynamic spring constant with respect to vibration input in the vehicle vertical direction when the stopper portion starts to deform. Therefore, in addition to the effect of the first or second aspect, there is an effect that vibration transmission to the vehicle body can be further suppressed.

  According to the vibration isolator of claim 4, the stopper portion is set such that the cross-sectional area of the leg portion formed by cutting along a plane orthogonal to the virtual straight line extending in the vehicle front-rear direction is smaller than the cross-sectional area of the protruding portion. Is done. As a result, the dynamic spring constant of the leg with respect to the vibration input in the vehicle vertical direction when the stopper starts to be deformed can be made smaller than the dynamic spring constant of the protrusion. Therefore, in addition to the effect of any one of claims 1 to 3, there is an effect that the transmission of vibration to the vehicle body can be reliably suppressed by the leg portion.

  According to the vibration isolator of the fifth aspect, since the protruding portion protrudes from the protruding portion on one side in the vehicle front-rear direction, the stopper portion protrudes when the first fixture and the bracket member move in the vehicle front-rear direction. Deformation of the strip begins. Since the protruding portion is formed in a protruding shape and extends in the left-right direction of the vehicle, the protruding portion can be easily subjected to shear deformation with respect to vibration input in the vertical direction of the vehicle. As a result, in addition to the effect of any one of the first to fourth aspects, there is an effect that vibration input in the vehicle vertical direction, particularly vibration transmission with a small amplitude can be suppressed.

It is a top view of the vibration isolator in one embodiment of the present invention. It is an axial sectional view of the vibration isolator taken along line II-II in FIG. It is a top view of a stopper member. It is a bottom view of a stopper member. It is a side view of the stopper member in the arrow V direction view of FIG. (A) is an axial sectional view of the stopper portion when starting deformation, and (b) is an axial sectional view of the stopper portion during deformation.

  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 vibration isolator 1 according to an embodiment of the present invention, and FIG. 2 is an axial sectional view of the vibration isolator 1 taken along the line II-II in FIG. 1 and 2 indicate the vertical direction, the horizontal direction, and the front-rear direction of the vehicle 1 on which the vibration isolator 1 is mounted (in FIG. 6). the same). 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 is a device for preventing vibration generated by the power unit from being transmitted to the vehicle body (not shown) while supporting and fixing a power unit (not shown) such as an automobile engine. The mounting device 10, the bracket member 20 that connects the mounting device 10 to the power unit, the displacement regulating member 30 that surrounds the bracket member 20, and the stopper member 40 that is mounted on the outer surface of the bracket member 20 (see FIG. 2). ).

  As shown in FIG. 2, the mounting device 10 is spaced from the first fixture 11 made of metal, such as an aluminum alloy, which is formed in a conical shape tapered toward the bottom, with respect to the first fixture 11. A second fixture 12 arranged coaxially, and a vibration isolating base 13 that connects the second fixture 12 and the first fixture 11 and is made of a rubber-like elastic body are provided.

  The first fixture 11 has an upper surface (upper side surface in FIG. 2) serving as a mounting surface of the bracket member 20 as a flat end surface, and a vibration-proof base 13 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 11, and the bracket member 20 is fastened to the first fixture 11 by a bolt B screwed to the female thread portion. Fixed.

  The second fixture 12 is formed in a cylindrical shape and a steel fitting 12a made of a steel material in which an anti-vibration base 13 is vulcanized and bonded to the inner peripheral surface, and a cylinder in which the cylindrical fitting 12a is fitted on the inner peripheral side. And an outer metal fitting 12b made of a steel material. Attachment members 61 and 62 attached to the vehicle body are fixed to the second attachment 12 (outer metal fitting 12b).

  A liquid sealing chamber in which a liquid such as ethylene glycol is sealed between the diaphragm 14 and the anti-vibration base 13 by attaching the diaphragm 14 to the lower end opening of the cylindrical fitting 12 a of the second fixture 12. It is formed. The liquid sealing chamber is partitioned by a partition 15 into a first liquid chamber 16 on the vibration isolating base 13 side and a second liquid chamber 17 on the diaphragm 14 side, and the first liquid chamber 16 and the second liquid chamber 17 are partitioned. The orifices 18 formed along the outer periphery of the body 15 communicate with each other.

  The bracket member 20 is a metal connection member such as an aluminum alloy for connecting the first fixture 11 of the mount device 10 to the power unit side. The bracket member 20 is fastened and fixed to the upper surface (the upper side surface in FIG. 2) of the first fixture 11 of the mount device 10 by a bolt B, and the root portion 23 (see FIG. 1) is a bolt (not shown) on the power unit side. Z)).

  A top surface of the bracket member 20 on the front end side (the front side surface in FIG. 1 and the upper side surface in FIG. 2) is recessed with a bolt fixing portion 21 having a circular shape in plan view toward the bottom surface. A circular bolt insertion hole 22 in a plan view through which the shaft portion of the bolt B is inserted is formed concentrically. The bottom surface of the bolt fixing portion 21 is a seating surface of the head of the bolt B. The bracket member 20 can be reduced in weight as much as the bolt fixing portion 21 is recessed.

  A plurality of attachment holes 24 are formed in the root portion 23 of the bracket member 20. The base 23 is attached to the power unit side by inserting bolts protruding from the power unit side into the attachment holes 24 and fastening these bolts with nuts. As a result, in the mount apparatus 10, the input direction of the main vibration by the power unit is set in the arrow UD direction.

  The displacement restricting member 30 is a gate-shaped member made of a steel material for restricting the displacement of the bracket member 20, and is fixed to the outer metal fitting 12 b of the second fixture 12. The displacement regulating member 30 has an opening 30a formed laterally (in the direction perpendicular to the plane of FIG. 2, in the direction of the arrow LR) so as to cover the outer surface of the bracket member 20 inserted through the opening 30a. The

  That is, the inner surface (the first restricting portion 31, the second restricting portion 32, and the third restricting portion 33) of the displacement restricting member 30 is formed on the upper surface (upper side surface in FIG. 2) and both side surfaces (left and right surfaces in FIG. 2). These surfaces are surrounded with a gap between them. Therefore, when a large amplitude vibration is input from the power unit to the vibration isolator 1, the portion surrounded by the displacement regulating member 30 of the bracket member 20 is brought into contact with the inner surface of the displacement regulating member 30. The relative displacement of the bracket member 20 with respect to the second fixture 12 is restricted.

  A circular opening 30b having an inner diameter through which the head of the bolt B can be inserted is formed on the upper surface of the displacement regulating member 30. In addition, a bounce restricting member (not shown) is fixed to the opening 30 a of the displacement restricting member 30 between the upper end of the outer fitting 12 b of the second fixture 12 and the bracket member 20. It is comprised so that the downward displacement of can be controlled.

  The stopper member 40 is a bottomed cylindrical body that is vulcanized and molded from a rubber-like elastic body separately from the bracket member 20, and the bracket member 20 is inserted into the cylindrical body from the front end side. The outer surface of the bracket member 20 is covered. Thereby, the impact when the displacement of the bracket member 20 is regulated by the displacement regulating member 30 is alleviated.

  Next, the stopper member 40 will be described with reference to FIGS. 3 is a plan view of the stopper member 40, FIG. 4 is a bottom view of the stopper member 40, and FIG. 5 is a side view of the stopper member 40 as viewed in the direction of arrow V in FIG. 3 to 5, arrows UD, LR, and FB indicate the vertical direction of the vehicle on which the vibration isolator 1 is mounted when it is assumed that the stopper member 40 is attached to the bracket member 20. The left-right direction and the front-rear direction are shown. Therefore, the positional relationship of the stopper member 40 shown in FIGS. 3 to 5 corresponds to the positional relationship of FIGS. 1 and 2.

  As shown in FIGS. 3 to 5, the stopper member 40 includes an upper surface portion 41, a lower surface portion 42 arranged in parallel with the upper surface portion 41 at a predetermined interval, and the upper surface portion 41 and the lower surface portion 42 connected to each other. Side surface portions 43 and 44 and a tip surface portion 45 that connects the side surface portions 43 and 44, and a substantially cylinder whose one side (the lower side in FIGS. 3 and 4, the arrow L side) is opened by each of the surface portions 41 to 45. It is formed in a shape. The bracket member 20 is inserted into the opening of the cylindrical body from the distal end side, and the outer surface of the bracket member 20 is covered with the stopper member 40.

  The upper surface portion 41 is a portion that is mounted on the upper surface of the bracket member 20, and when the power unit is largely displaced in the rebound direction (arrow U direction), the bracket member 20 and the third restriction portion 33 (see FIG. 2). Intervenes to function as a stopper rubber. The upper surface portion 41 is formed in a flat plate shape that is substantially rectangular in plan view and has a substantially constant plate thickness. The upper surface portion 41 has a plurality of hemispherical protrusions 41 b protruding from the upper surface, and a circular insertion hole 41 a in a plan view through which the head of the bolt B (see FIG. 2) can be inserted is formed in the center portion. . The insertion hole 41 a is disposed concentrically with the bolt fixing portion 21 and the bolt insertion hole 22 of the bracket member 20 in a state where the stopper member 40 is mounted on the bracket member 20.

  The lower surface portion 42 is a portion that is attached to the lower surface of the bracket member 20, and when the power unit is greatly displaced in the bound direction (arrow D direction), between the bracket member 20 and the bound regulating member (not shown). Intervenes and functions as a stopper rubber. The lower surface portion 42 has a substantially trapezoidal shape in plan view and is formed in a flat plate shape having a substantially constant plate thickness.

  The side surface portion 43 is a portion that is attached to the side surface of the bracket member 20, and when the power unit is greatly displaced rearward (in the direction of arrow B), the bracket member 20 and the first restriction portion 31 (see FIG. 2). Intervenes to function as a stopper rubber. The side surface portion 43 is coupled with a stopper portion 50 (described later). The side surface portion 44 is a portion that is attached to the side surface of the bracket member 20, and when the power unit is largely displaced forward (in the direction of arrow F), the bracket member 20 and the second restricting portion 32 (see FIG. 2). Intervenes to function as a stopper rubber.

  In the side surface parts 43 and 44, substantially the entire upper side is coupled to the upper surface part 41, while a part of the lower side is coupled to the lower surface part 42. Further, the side surface portions 43 and 44 are provided with fitting protrusions 43a and 44a extending along the vertical direction (the vertical direction in FIG. 4 and the vertical direction in FIG. 5) on the inner surfaces thereof. The fitting protrusions 43a and 44a are portions that function as a retaining portion for preventing the stopper member 40 from falling off the bracket member 20, and are recessed grooves (not shown) provided in the side surface of the bracket member 20. ).

  The front end surface portion 45 is a portion that is attached to the front end surface of the bracket member 20, and is a portion that regulates the displacement of the stopper member 40 in the horizontal direction (arrow F, B, L direction). The front end surface portion 45 is formed in a flat plate shape having a substantially rectangular shape when viewed from the front and having a substantially constant plate thickness, and the upper side is coupled to the upper surface portion 41 and both side sides are coupled to the side surface portions 43 and 44. Since the surface portions 41 to 45 are coupled as described above, the stopper member 40 has an opening 46 having a size that exposes the entire lower surface on the front end side of the bracket member 20 formed on the lower surface side (arrow D direction). Is done.

  In addition, the front end surface portion 45 is provided with a concave portion 45 communicating with the opening 46 at the center in the width direction (left and right direction in FIG. 4) of the front end surface portion 45 toward the outside in the thickness direction. In a state where the stopper member 40 is mounted on the bracket member 20, the recess 45 communicates with an opening 21 a (see FIG. 1) formed through the bottom of the bolt fixing portion 21 of the bracket member 20. As a result, water or the like that has entered the bolt fixing portion 21 is discharged to the outside through the opening 21 a and the recess 45.

  In the stopper member 40, a stopper portion 50 made of a rubber-like elastic body is coupled to the side surface portion 43. The stopper part 50 is a part interposed between the bracket member 20 and the first restricting part 31 when the power unit is largely displaced rearward of the vehicle (in the direction of arrow B in FIG. 2). The stopper portion 50 protrudes from the side surface portion 43 and protrudes from the side surface portion 43 toward the rear side of the vehicle (in the direction of arrow B in FIG. 5), and on the horizontal direction one side (rear side of the vehicle) of the leg portion 51. A protrusion 52 is provided at the end, and protrudes from the end toward the vehicle rear side (in the direction of arrow B in FIG. 5) and the vehicle in the vertical direction (in the direction of arrow UD in FIG. 5).

  The stopper portion 50 is opened on both sides of the vehicle in the vertical direction (in the direction of the arrow UD in FIG. 5), and two bottomed straight portions 54 reaching the leg portions 51 are formed. Note that the two straight portions 54 are orthogonal to the protruding direction of the leg portion 51 with respect to the side surface portion 43 (the arrow FB direction in FIG. 5) and the upward and downward protruding direction of the protruding portion 52 (the arrow UD direction in FIG. 5). Opening is also made on both sides of the vehicle in the left-right direction (the direction perpendicular to the plane of FIG. 5, the direction of the arrow LR).

  The leg part 51 is a part where the rigidity of the stopper part 50 is partially reduced by the straight part 54, and is substantially the same length as the length of the upper surface part 41 (see FIG. 3) in the left-right direction (arrow LR direction). Set to In the present embodiment, the two straight portions 54 are set to the same depth (dimension in the direction of the arrow UD).

  The protrusion 52 is a part for stabilizing the posture of the mount device 10 by utilizing a reaction force when it is compressed and restored by the displacement of the mount device 10 and is restored. It is set to the same length as the length in the left-right direction (arrow LR direction). Moreover, the protrusion part 52 is set to the length substantially the same as the up-down direction (arrow UD direction) length of the side part 43 (refer FIG. 5). In the present embodiment, the projecting portion 52 is formed on a flat surface corresponding to the flat surface shape of the first restricting portion 31 facing the end surface of the vehicle rear (arrow B direction).

  The stopper portion 50 is provided with a protrusion 53 protruding on one side in the horizontal direction of the protrusion 52 (in the direction of arrow B in FIG. 5). The protruding portion 53 is formed in a protruding shape and extends in a direction (arrow L-R direction) orthogonal to the upward and downward protruding direction (arrow UD direction in FIG. 5) of the protruding portion 52. In the present embodiment, the protrusions 53 are formed in a semicircular cross section, and three protrusions 52 are provided. The protrusion 53 is set to the same length as the length of the protrusion 52 (see FIG. 3) in the left-right direction (arrow LR direction).

  Next, the operation of the stopper portion 50 during forward acceleration of the vehicle will be described with reference to FIG. 6A is an axial cross-sectional view of the stopper portion 50 when the distal end portion of the ridge portion 53 comes into contact with the first restricting portion 31 and starts deformation, and FIG. 6B is a stopper portion being deformed. FIG.

  In the present embodiment, as shown in FIG. 6A, the protrusion 53 is formed in the region of the protrusion 52 that overlaps the region in which the leg 51 is projected in the vehicle front-rear direction (arrow FB direction). A tip is provided. Further, the leg portion 51 of the stopper portion 50 is located in a region where the region in which the bracket member 20 is projected in the vehicle front-rear direction (arrow FB direction) and the region in which the first restricting portion 31 is projected in the vehicle front-rear direction overlap. Be placed. Furthermore, when the area of the cross section of the leg 51 cut by a plane orthogonal to a virtual straight line (not shown) extending in the vehicle longitudinal direction (arrow FB direction) is cut by a plane parallel to the plane. It is set smaller than the area of the cross section of the projecting portion 52 that can be made.

  During forward acceleration of the vehicle, the bracket member 20 moves rearward (in the direction of arrow B) due to the movement of the power unit (not shown) (see FIG. 2). Since a predetermined gap is provided between the stopper portion 50 and the first restricting portion 31, the stopper portion 50 (the protruding portion 53) comes into contact with the first restricting portion 31 by quickly filling the gap ( (See FIG. 6 (a)). At this time, the leg portion 51 having a smaller cross-sectional area than the protruding portion 52 is compressed and deformed while the straight portion 54 formed between the side surface portion 43 and the protruding portion 52 is crushed, so that the stopper portion 50 (the protruding portion 53). ) Can be suppressed from feeling shock when abutting against the first restricting portion 31. Moreover, generation | occurrence | production of the contact sound when the stopper part 50 (ridge part 53) contacts the 1st control part 31 can be suppressed.

  In addition, since the protrusion part 53 contacts the 1st control part 31 and the protrusion part 53 is compressively deformed, the stopper part 50 can further improve the suppression effect of a shock feeling, and the protrusion part 53 is 1st. It is possible to further improve the effect of suppressing the contact sound that occurs when contacting the restricting portion 31.

  Further, since the ridge 53 is formed in a ridge shape and extends in the vehicle left-right direction (arrow L-R direction), the vehicle vertical direction (arrow UD direction), which is the main vibration input direction, extends. The protrusion 53 can be easily sheared and deformed with respect to the vibration input. As a result, the dynamic spring constant in the vehicle vertical direction of the stopper unit 50 can be reduced, and vibration input in the vehicle vertical direction by the power unit when the stopper unit 50 is actuated during forward acceleration of the vehicle, in particular vibration transmission with a small amplitude. Can be suppressed.

  As shown in FIG. 6B, even when the ridge 53 is almost crushed, the leg 51 is compressed and deformed while the straight portion 54 is crushed. The leg 51 is a plane in which the cross-sectional area of the leg 51 formed when cut along a plane orthogonal to a virtual straight line (not shown) extending in the vehicle front-rear direction (arrow FB direction) is parallel to the plane. Since it is set to be smaller than the cross-sectional area of the protruding portion 52 formed when it is cut, the leg portion 51 can be easily subjected to shear deformation with respect to vibration input in the vehicle vertical direction (arrow UD direction), which is the main vibration input direction. it can. As a result, the dynamic spring constant in the vehicle vertical direction of the stopper unit 50 can be reduced, and the vibration input in the vehicle vertical direction by the power unit when the stopper unit 50 is activated can be suppressed. In addition, since the leg part 51 is compressed and deformed while crushing the straight part 54, it can suppress that the spring constant of the stopper part 50 increases rapidly. Therefore, a feeling of shock can be suppressed.

  Since the two straightening portions 54 are opened on both sides in the vehicle left-right direction (arrow LR direction), the vehicle vertical direction (arrow U-) is compared with the case where the straightening portion 54 is not opened on both sides in the vehicle left-right direction. The leg portion 51 can be easily subjected to shear deformation in response to vibration input in the (D direction). As a result, it is possible to increase the effect of suppressing an increase in the dynamic spring constant with respect to the vibration input in the vehicle vertical direction (arrow UD direction) when the deformation of the stopper portion 50 starts. Therefore, vibration transmission to the vehicle body when the stopper portion 50 is activated can be further suppressed.

  Here, when the stopper portion 50 is operated, vibration in the vehicle vertical direction (arrow UD direction) by the power unit is easily transmitted to the vehicle body side, so that the stopper portion 50 is difficult to operate during forward acceleration of the vehicle. It is possible to set the interval between the portion 50 and the first restricting portion 31 to be larger than the interval between the side surface portion 44 (see FIG. 5) and the second restricting portion 32 (see FIG. 2). However, if the setting is made in this manner, the displacement of the vibration isolating base 13 of the mounting apparatus 10 increases, and the durability of the vibration isolating base 13 may be reduced.

  On the other hand, according to the present embodiment, since vibration transmission in the vehicle vertical direction after the stopper portion 50 is actuated can be suppressed, the stopper portion 50 and the stopper portion 50 are made difficult to actuate when the vehicle is accelerated forward. It is not necessary to set the interval between the first restricting portion 31 and the interval between the side portion 44 (see FIG. 5) and the second restricting portion 32 (see FIG. 2). As a result, it is possible to suppress the displacement of the vibration isolating base 13 of the mounting apparatus 10 from increasing, and it is possible to prevent the durability of the vibration isolating base 13 from being lowered.

  In addition, when the protrusion part 53 and the straight part 54 are crushed completely, in order for the stopper part 50 to move further to a vehicle back (arrow B direction) after that, it is necessary to compressively deform the rubber part of the stopper part 50. . Therefore, further displacement can be reliably regulated by the stopper portion 50.

  Here, the stopper portion 50 has a bottomed bottom with a depth at which the protruding portion 52 protrudes to both the vehicle rear side (arrow B direction) and the vehicle vertical direction (arrow UD direction) of the leg portion 51 and reaches the leg portion 51. Two straightening portions 54 are respectively opened on both sides of the vehicle vertical direction (arrow UD direction). Therefore, it is possible to suppress the load in the twisting direction that is input to the vibration-proofing base 13 of the mounting device 10 (see FIG. 2) when the two straight portions 54 are crushed. Thereby, the attitude | position of the mounting apparatus 10 can be stabilized. As a result, the durability of the vibration isolating base 13 of the mounting apparatus 10 can be improved.

  Further, even when a load in the twisting direction is input to the vibration isolating base 13 of the mounting apparatus 10 (see FIG. 2), when the compression-deformed stopper portion 50 is restored, the leg portion 51 and the protruding portion 52 A reaction force having the same magnitude as the input load to the stopper 50 and having the opposite direction can be generated. Therefore, the displacement of the mounting device 10 can be stabilized by utilizing the reaction force when the stopper 50 is restored, and as a result, the durability of the vibration isolating base 13 can be improved.

  Moreover, the stopper part 50 has the area | region which projected the bracket member 20 in which the leg part 51 is provided in the vehicle front-back direction (arrow FB direction), and the 1st control part 31 in the vehicle front-back direction (arrow FB direction). Legs 51 are arranged in a region where the projected region overlaps. As a result, the reaction force when the leg 51 and the protrusion 52 are restored can be reliably applied to the bracket member 20 on which the leg 51 is provided. Therefore, the posture of the mounting apparatus 10 can be further stabilized.

  In particular, according to the present embodiment, the position of the center of gravity on the front end side of the bracket member 20 to which the first fixture 11 is fixed by the bolt B when viewed in the vehicle longitudinal direction (arrow FB direction) is A region where 51 is projected in the vehicle front-rear direction (arrow FB direction) and a region where the first restrictor 31 is projected in the vehicle front-rear direction (arrow FB direction) are provided in an overlapping region. Therefore, the reaction force when the leg portion 51 and the protruding portion 52 are restored can be reliably transmitted to the bracket member 20 side, so that the posture of the mounting apparatus 10 can be further stabilized.

  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. For example, the number, size, shape, and the like of the ridges 53 provided on the protrusion 52 can be set as appropriate, and the ridges 53 can be omitted.

  In the above-described embodiment, the case where the liquid-filled vibration isolator is used as the mount device 10 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.

  In the above embodiment, the case where the bracket member 20 is attached to the first fixture 11 and the stopper member 40 on which the stopper portion 50 is formed is covered with the bracket member 20 is described, but the present invention is not necessarily limited thereto. When the axial direction (arrow UD direction) length of the 1st fixture 11 is enlarged and the predetermined part of the 1st fixture 11 faces the 1st control part 31, a 1st fixture It is of course possible to attach the stopper member 40 to 11.

  In the said embodiment, although the case where the stopper part 50 was a part of stopper member 40 covered on the bracket member 20 was demonstrated, it is not necessarily restricted to this. It is naturally possible to vulcanize and bond the stopper portion 50 integrally with the bracket member 20 and the first fixture 11.

  Although the case where the stopper part 50 is provided on the bracket member 20 side has been described in the above embodiment, the present invention is not necessarily limited thereto, and the provision of the stopper part 50 on the displacement restriction member 30 (first restriction part 31) is not necessarily limited thereto. Of course it is possible. Also in this case, the displacement can be regulated by providing the stopper portion 50 between the bracket member 20 or the first fixture 11 and the displacement regulating member 30 (first regulating portion 31). In this case, it is possible to attach the stopper 50 to the displacement regulating member 30 (first regulating portion 31) as a separate member, and the stopper 50 to the displacement regulating member 30 (first regulating portion 31). It is also possible to vulcanize and bond together.

  In the above-described embodiment, the case where the end surface of the protruding portion 52 that faces the first restricting portion 31 is formed in a flat shape (planar shape) has been described, but the present invention is not necessarily limited thereto. For example, it is naturally possible to make the end surface of the projecting portion 52 facing the first restricting portion 31 into a curved surface shape (cylindrical surface shape, spherical surface shape, etc.). Thereby, the shock feeling when the end surface of the protrusion part 52 contacts the 1st control part 31 can be reduced more.

  In the above-described embodiment, the case where the depths (dimensions in the arrow UD direction) of the two straight portions 54 formed in the stopper portion 50 are the same is described, but the present invention is not necessarily limited thereto. Of course, it is possible to make the depths of the two straight portions 54 different from each other in consideration of the direction of the input load and the like.

DESCRIPTION OF SYMBOLS 1 Anti-vibration apparatus 10 Mounting apparatus 11 1st attachment 12 Second attachment 13 Anti-vibration base | substrate 20 Bracket member 31 1st control part (displacement control part)
50 Stopper section 51 Leg section 52 Projection section 53 Projection section 54 Straight section

Claims (5)

A first fixture attached to the power unit side, a second fixture attached to the vehicle body side, and a rubber-like elastic body interposed between the first fixture and the second fixture. A mounting device comprising an anti-vibration substrate;
A bracket member attached to the first fixture of the mounting device and fixed to the power unit;
A displacement restricting portion that is fixed to the second fixture and restricts displacement of the first fixture and the bracket member in the vehicle longitudinal direction;
A stopper that is made of a rubber-like elastic body and is interposed between the displacement regulating portion and the first fixture or the bracket member while being attached to the displacement regulating portion, the first fixture, or the bracket member. With
The stopper portion is
Legs projecting to one side in the vehicle longitudinal direction;
Provided at the end of one side of the leg in the vehicle front-rear direction, and with a projecting portion protruding from the end to the vehicle front-rear direction one side and the vehicle up-down direction both sides,
Two anti-vibration devices having bottoms that are open on both sides of the vehicle in the vertical direction and reach the legs are formed.   The stopper portion is provided in a region where a region where the first fixture or the bracket member provided with the leg portion is projected in the vehicle front-rear direction and a region where the displacement restriction portion is projected in the vehicle front-rear direction overlap. The anti-vibration device according to claim 1, wherein a portion is disposed.   The vibration isolator according to claim 1 or 2, wherein the two straight portions are opened on both sides in the vehicle left-right direction.   The area of the cross section of the leg portion formed when the stopper portion is cut by a plane orthogonal to a virtual straight line extending in the vehicle front-rear direction is set smaller than the area of the cross section of the protruding portion. The vibration isolator in any one of 1-3. The stopper portion includes a protrusion that protrudes on one side of the protrusion in the vehicle front-rear direction.
The vibration isolator according to any one of claims 1 to 4, wherein the protruding portion is formed in a protruding shape and extends in the left-right direction of the vehicle.

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