JP4617103B2 - Anti-vibration mounting device - Google Patents

Description

  The present invention relates to an anti-vibration mount device used for elastic support of at least one of both ends of a power plant mounted on a vehicle so that the longitudinal direction is the vehicle width direction and both ends are elastically supported with respect to the vehicle body. In particular, the present invention belongs to the technical field in which a swing restricting mechanism for restricting swing in the roll direction of the power plant is provided.

  Conventionally, for example, in front engine / front drive (FF) type vehicles, generally, the longitudinal direction of the power plant in which the engine and the transmission are arranged in series (the direction in which the crankshaft extends) is directed in the width direction of the vehicle body. And both ends are elastically supported by vehicle body side frames located on the left and right ends of the engine room (so-called horizontal mounting method).

  As such a horizontal mounting system, for example, as disclosed in Patent Document 1, an inertia main shaft mount in which main mounts on both the left and right sides are disposed close to a roll inertia main shaft (hereinafter simply referred to as a roll shaft) of a power plant. Is the mainstream. This is because idling vibration can be effectively reduced by making the dynamic spring around the roll axis relatively soft while ensuring the support rigidity of the two left and right mounts responsible for most of the static load of the power plant. It is.

  However, if the dynamic spring around the roll axis is softened in this way, for example, when the engine drive output (torque) fluctuates greatly during sudden acceleration or sudden deceleration, the reaction force (torque) causes the entire power plant to Since it will rotate (roll) largely around the roll axis, in the case of an inertia main shaft mount, normally, in addition to the left and right main mounts, a plurality of mounts for restricting rolling are provided on the front and rear of the power plant vehicle. I am doing so.

  On the other hand, as disclosed in Patent Document 2, for example, the power plant support point by the left and right main mounts is set slightly higher than the roll axis, and the entire power plant can be swung like a pendulum. And a torque rod for restricting the vibration is disposed at the lower end of the power plant and is connected to the vehicle body side (hereinafter referred to as a pendulum mount).

  In this pendulum mount, the left and right main mounts are separated from the roll shaft as compared to the general inertial main shaft mount described above, so that a force in the vehicle longitudinal direction acts directly on the main mount as the power plant rolls. In other words, rolling is also restricted by the main mount itself. In consideration of this point, in the one described in Patent Document 2, in addition to the independent torque rod at the lower end of the power plant, the left and right main mounts are each provided with a torque rod as a swing restricting mechanism. In this way, the force in the longitudinal direction of the vehicle is received.

  However, when the torque rod is also arranged on the main mount as described above, the number of components of the mount is increased and the number of assembly steps is increased, resulting in a considerable cost increase. . In order to prevent the vertical movement of the mount from being hindered by attaching the torque rod, the front and rear ends of the torque rod are supported so as to be rotatable around the horizontal axis, and the rubber is prevented from transmitting vibration. It is because it connects via a bush.

  In this regard, various stopper mechanisms that can regulate displacement in the mount with a simpler structure are also known. For example, in the thing of patent document 3 and 4, the stopper rubber part is provided so that it may each protrude in the vehicle front-back both sides of the member connected by the power plant side, and this stopper rubber part each opposes the vehicle front-back direction. Further contact with the member on the vehicle body side restricts further displacement.

Further, when the stopper rubber part comes into contact with the member on the vehicle body side, there is a possibility that the vibration of the power plant is transmitted to the vehicle body side through the stopper rubber part. In the stopper mechanism, a rigidity is partially reduced by providing a protrusion at the tip of the stopper rubber part or by providing an edge (hollow part) inside the stopper rubber. As a result, the spring constant of the mount does not suddenly increase immediately after the operation of the stopper, and the increase of the spring constant in the initial stage of the stopper operation becomes relatively gradual so that vibration can be absorbed.
French Patent Application Publication No. 2737008 German Patent Application No. 4209613 JP 2003-184939 A JP 2002-257182 A JP-A 61-92329 Japanese Patent Publication No. 60-02541

  However, all of the conventional stopper mechanisms (Patent Documents 3 to 6) receive the vehicle longitudinal direction input to the mount like the torque rod and raise the vertical movement spring without hindering the vertical movement. Since it cannot be minimized, it cannot be a substitute for a torque rod.

  That is, in the above-mentioned Patent Documents 3 and 4, as described above, in a state where the stopper rubber portion is in contact with the vehicle body side member and receives the pressing force in the vehicle longitudinal direction, the elastic deformation of the compressed rubber is applied to the vehicle. Not only the front-rear direction but also the vertical direction is greatly limited, and the vehicle body side member is restrained against the power plant side member by the stopper rubber portion. For this reason, immediately after the operation of the stopper, the front and rear dynamic springs of the entire mount and the upper and lower dynamic springs suddenly rise, and the vibration isolation performance deteriorates rapidly.

  Further, in the case where the rigidity of a part of the stopper rubber portion is reduced as in Patent Documents 5 and 6, the rubber is easily elastically deformed at the initial operation of the stopper, but the vehicle is When the pressing force in the front-rear direction is large, the upper and lower dynamic springs rise rapidly as in the above-mentioned Patent Documents 3 and 4. That is, in Patent Documents 5 and 6, the deterioration of the mount anti-vibration performance due to the operation of the stopper is only delayed, and the vertical motion spring as the entire mount is received while reliably receiving the load in the vehicle longitudinal direction like a torque rod. It is not designed to prevent the vertical vibration from being sufficiently absorbed.

  The present invention has been made in view of such points, and an object of the present invention is to provide an anti-vibration mount device that elastically supports a power plant mounted horizontally on a so-called FF vehicle or the like with respect to the vehicle body. Thus, by devising the structure of the swing restricting mechanism provided integrally therewith, the same function as that of the torque rod can be obtained with a simple structure with less cost increase.

  In order to achieve the above object, according to the present invention, a restriction member composed of a rubber member and a tubular member is provided as a swing restriction mechanism, and the restriction member is arranged in front and rear of the vehicle by the tubular member of the restriction member. Even when a compressive force in the direction is applied, the vehicle body side member and the power plant side member can be easily displaced relative to each other in the vertical direction.

  Specifically, in the invention of claim 1, at least one elastic support of the both ends of the power plant mounted on the vehicle so that the longitudinal direction is the vehicle width direction and both ends are elastically supported with respect to the vehicle body. And a vibration-proof mount device provided with a swing restricting mechanism for restricting swing in the roll direction of the power plant.

A vehicle body side member attached and fixed to the vehicle body; a power plant side member attached and fixed to the power plant; and the vehicle body side member and the power plant side member. Elastic support means for elastically supporting the vehicle body side member, and the vehicle body side member and the power plant side member have opposing surfaces facing each other in the vehicle longitudinal direction when mounted and fixed to the vehicle body and the power plant, respectively. The swing restricting mechanism is fixedly attached to one of the opposing surfaces of the vehicle body side member and the power plant side member, and abuts against the other opposing surface when swinging in the roll direction of the power plant. A regulating member that regulates swinging, the regulating member having an attachment surface that is fixedly attached to the one opposing surface and an abutting surface that abuts the other opposing surface; A cylindrical member provided between a mounting member and a contact surface of the rubber member, the axial center extending in a substantially horizontal direction perpendicular to the opposing direction of the two opposing surfaces, and both ends in the axial direction being open The cylindrical member has an elliptical shape with a major axis extending substantially in the vertical direction, and the cylindrical member is in the vehicle front-rear direction with the regulating member abutting against the other facing surface. When being compressed, the power plant side member is configured to receive vertical vibrations with respect to the vehicle body side member and shear the deforming member in the vertical direction .

  With the above configuration, for example, when the vehicle is accelerated or decelerated, the power plant is rotated (rolled) around the roll axis by the action of the driving reaction force. When the member is relatively displaced in the vehicle front-rear direction, the rubber member of the restricting member is sandwiched between both opposing surfaces and is pressed and compressed in the vehicle front-rear direction (the cylindrical member is also compressed at the same time). Force) is received by the entire regulating member to regulate the swing of the power plant in the roll direction.

When the power plant side member vibrates up and down with respect to the vehicle body side member during compression of the rubber member (regulating member), the elliptical cylindrical member whose major axis extends in the substantially vertical direction is the axis or the axis. The entire regulating member is easily sheared up and down easily by rotating around the axis parallel to the axis, or by shifting the mounting surface side portion and the contact surface side portion of the cylindrical member vertically. As a result, the vehicle body side member and the power plant side member can be relatively displaced up and down easily. Further, by configuring the cylindrical member with metal or the like, the ratio of the dynamic spring to the static spring (static ratio) of the entire regulating member can be reduced and the frequency dependency can be reduced as compared with the rubber member alone. (The static-to-static ratio hardly increases even in the high-frequency region). Therefore, even if the swing restricting mechanism is activated, the rise of the vertical movement spring of the whole vibration isolating mount device with respect to the pre-operation is suppressed, and the vertical vibration is sufficiently absorbed as before the operation.

  Therefore, according to the swing restricting mechanism of the present invention, the same function as that of a torque rod can be obtained by providing a cylindrical member, unlike the conventional general stopper mechanism. Thus, it is possible to sufficiently maintain the absorption performance of the vertical vibration in the vibration-proof mount while effectively regulating the swing of the power plant in the roll direction.

According to a second aspect of the present invention, in the first aspect of the present invention, both end portions in the axial direction of the cylindrical member are projected to the outside of the rubber member.

  As a result, it is possible to prevent the rubber member from being cracked by both corners where the peripheral side surface of the cylindrical member and both end surfaces in the axial direction intersect, and the durability of the rubber member can be improved.

According to a third aspect of the present invention, in the first or second aspect of the present invention, recesses are formed on both end surfaces of the rubber member in the axial direction of the cylindrical member.

  That is, when the rubber member is compressed in the vehicle front-rear direction, both end faces of the rubber member in the axial direction (vehicle width direction) of the cylindrical member bulge outward, and therefore, the linear characteristic of the deflection amount and the load in the rubber member Will collapse early. However, in this invention, since the concave portions are formed on both end surfaces of the rubber member in the axial direction of the cylindrical member, even if the rubber member is compressed in the vehicle front-rear direction, the both end surfaces may bulge outward. Thus, the linear region between the deflection amount and the load can be expanded.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a hollow portion is formed in an inner portion of the tubular member in the rubber member.

  In this way, when the pressing force in the vehicle front-rear direction is received by the rubber member and the cylindrical member, a greater burden is imposed on the cylindrical member, and the static motion ratio of the entire regulating member is further reduced. And the absorption performance of vertical vibration can be improved.

According to a fifth aspect of the present invention, in any one of the first to third aspects, the rubber member has a mounting surface side portion and a contact surface side portion that are provided apart from each other, and the cylindrical member is It is assumed that the mounting surface side portion and the contact surface side portion are provided across the both side portions so as to be connected.

Thus, the same effect as that of the invention of claim 4 can be obtained, and the attachment surface side portion and the contact surface side portion of the rubber member can easily be displaced from each other in the vertical direction, so that the vehicle body side member and the power plant side member Are more easily displaced in the vertical direction.

According to a sixth aspect of the invention, in the fifth aspect of the invention, it is assumed that at least one of the corner portions where the mounting surface and the upper and lower surfaces of the rubber member intersect is chamfered.

  Thus, the portion of the rubber member on the side of the mounting surface opposite to the mounting surface is easily deformed in the vertical direction with respect to the mounting surface, and the vertical shear deformation of the entire regulating member is further facilitated.

As described above, according to the present invention, when a vibration control mechanism that replaces a torque rod is provided in a vibration isolation mount device that elastically supports a power plant mounted horizontally on a vehicle, The vehicle body side member and the power plant side member are attached and fixed to one of the opposing surfaces provided so as to oppose each other in the vehicle longitudinal direction, and abut against the other opposing surface when the power plant swings in the roll direction. A regulating member for regulating the swing is provided, and the regulating member is composed of a rubber member and a cylindrical member . The cylindrical member has an elliptical shape with a long axis extending substantially in the vertical direction. When the restricting member abuts against the other facing surface and is compressed in the vehicle front-rear direction, the restricting portion receives the vertical vibration of the power plant side member relative to the vehicle body side member. The With the arrangements so as to shear deformation in the vertical direction, comes to shear easily vertically even when the regulating member is subjected to compressive forces in the vehicle longitudinal direction, while a less simple construction of cost The load in the longitudinal direction of the vehicle can be reliably received like a torque rod, and the acceleration hum of the vehicle can be sufficiently suppressed without causing a sudden rise in the vertical movement spring.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Overall configuration of mount system)
1 and 2 show a schematic configuration of an engine mount system using an anti-vibration mount device according to an embodiment of the present invention. In both figures, reference numeral P denotes an engine 1 and a transmission 2 coupled in series. It is a power plant. This power plant P is mounted horizontally in an engine room of an automobile (not shown) so that its longitudinal direction (the direction in which the crankshaft of the engine 1 extends) is the vehicle width direction (the left-right direction of the vehicle). At two locations with respect to the vehicle body side frames 6 and 7 through the mounts 3 and 5 as the above-mentioned vibration-proof mounting devices disposed at both ends in the longitudinal direction, that is, at the respective ends on the engine 1 side and the transmission 2 side. Elastically supported. The lower end of the power plant P is connected to a rear vehicle body member 9 (subframe or the like) by a torque rod 8 independent of the mounts 3 and 5. The mounts 3 and 5 shown in FIG. 1 are schematically described, and are slightly different from the detailed shapes shown in FIGS. 3 to 5 and FIGS. 6 and 7.

  FIG. 1 omits all of the intake / exhaust system and auxiliary equipment of the engine 1 and only the main body is viewed from the upper right side of the rear side of the vehicle. The belt cover 12 is disposed at the end in the longitudinal direction opposite to the transmission 2 (the vehicle right end shown on the near side in FIG. 1). A head cover 13 is disposed at the upper part of 11, and an oil pan (not shown) is disposed at the lower part of the cylinder block 10. Then, the lower end side of the engine side mounting bracket 15 is fastened to the right side wall of the cylinder head 11 through the belt cover 12, and extends from the mount 3 side to the upper end portion of the mounting bracket 15 extending upward therefrom. The flange plate 31b is fastened with being overlapped from above.

  In the present embodiment, the transmission 2 is an automatic transmission in which a differential is integrated in addition to a torque converter and a transmission gear train (a manual transmission or a CVT may be used), and the bell housing 20a of the transmission case 20 is an engine. 1 is connected to the cylinder block 10 at the crankshaft side end, and drives the front wheels of the automobile from the bulging portion 20b formed at the rear of the bell housing 20a toward the left and right sides, respectively. Drive shafts 22 and 22 extend. The transmission-side mount 5 is disposed so that the vicinity of the tip end portion of the tapered transmission case 20 is suspended from the side frame 7 on the left side of the vehicle by the transmission-side mount bracket 23.

  In the power plant P formed by connecting the engine 1 and the transmission 2 in series as described above, since the engine 1 is taller than the transmission 2, the roll axis R (roll inertia main axis) extending in the longitudinal direction. Is inclined downward from the end portion on the engine 1 side toward the transmission 2 side, as indicated by a one-dot chain line in the figure. Moreover, in this embodiment, the two mounts 3 and 5 responsible for the weight of the power plant P are respectively spaced upward from the roll axis R, whereby the power plant P is loaded with the two mounts 3 and 5. Is swingable like a pendulum around a line segment L (swinging spindle: see FIG. 2) connecting the supporting points.

  When a large driving reaction force (torque) is applied, for example, when the vehicle is suddenly accelerated or decelerated, the power plant P is generally arranged on the roll axis R as schematically shown by the white arrow in FIG. While rotating around (rolling) as a whole, it tends to swing back and forth like a pendulum around the upper swinging axis L, but such rolling and overall shaking (these are in the roll direction). Is controlled by a torque rod 8 provided at the lower end of the power plant P, and is also controlled by a swing restricting mechanism provided on each of the left and right mounts 3 and 5 described later. It will be.

  That is, in the present embodiment, in addition to the independent torque rod 8 arranged at the lower end of the power plant P as described above, the left and right mounts 3 and 5 also have a swing restricting mechanism having the same function as the torque rod. Even if a large load in the vehicle longitudinal direction is input to the mounts 3 and 5 when the power plant P rolls due to a driving reaction force during acceleration of the vehicle, the load is received by the swing restriction mechanism, The swing of the power plant P in the roll direction can be more reliably regulated.

(Engine side mount structure)
Next, of the two mounts 3 and 5 on the engine side and the transmission side, the detailed structure of the engine side mount 3 will be described with reference to FIGS.

  In this embodiment, as shown in FIG. 5, the engine-side mount 3 is a so-called liquid-filled type. The mount main body 30 that receives the static load of the power plant P includes a metal casing 31 as a power plant side member that is attached and fixed to the power plant P, a connection fitting 32, and between the casing 31 and the connection fitting 32. And a rubber elastic body 33 that elastically supports the casing 31 with respect to the connection fitting 32. The casing 31 is made of, for example, an aluminum alloy, and has a thick cylindrical casing main body 31a (outer wall portion) arranged so as to extend in the vertical direction, and extends from the upper outer periphery thereof in a direction substantially orthogonal to the axis Z. The flange plate 31b is integrally formed by casting or the like.

  The connection fitting 32 has a substantially conical shape with an upper concavity, and is disposed substantially coaxially so that its upper end is located at the approximate center of the lower end opening of the casing body 31a. A rubber elastic body 33 is interposed between the side surface portion and the inner peripheral surface of the casing body 31a facing the outer periphery thereof. The lower end surface of the connection fitting 32 is fixed to the upper surface of the side frame 6 and fastened and fixed to the support member 34 that supports the connection fitting 32 by bolts 35, whereby the connection fitting 32 and the support member 34 are connected to the vehicle body side. A member will be comprised.

  The support member 34 has an upper part 34a, a lower part 34b, a vehicle front side part 34c, and a vehicle rear side part 34d so as to surround the mount body part 30 when viewed from the vehicle width direction, and has a frame shape. The connecting bracket 32 is fastened and fixed to the vehicle longitudinal direction center portion, and both ends of the lower portion 34b in the vehicle longitudinal direction are fixedly attached to the side frames 6 by bolts (not shown). The support member 34 is formed with a plurality of lightening holes 34e.

  A mortar-shaped concave portion 33 a is formed on the lower inner peripheral side of the rubber elastic body 33, and the side peripheral surface of the concave portion 33 a is bonded to the tapered side surface portion of the connecting fitting 32. The rubber elastic body 33 has a substantially truncated cone shape extending radially outward from the entire circumference of the coupling fitting 32 and extending obliquely upward, and the outer peripheral surface of the upper portion thereof is the inner side of the casing body 31a. Bonded to the peripheral surface. Thus, the upper part of the rubber elastic body 33 bonded and fixed to the inner peripheral surface of the casing main body 31a is a relatively thick cylindrical shape that opens upward, and the upper end of the upper part of the casing main body 31a. It is located below the upper end by a predetermined length.

  A disc-shaped partition plate 36 is superimposed on the upper end of the rubber elastic body 33 from above, and a generally hat-shaped rubber diaphragm 37 is disposed from above to cover the entire partition plate 36. Has been. Thereby, the upper-end opening part of the rubber elastic body 33 is liquid-tightly closed, and a space is formed therein. In addition, a substantially cylindrical reinforcing plate 38 is embedded on the outer peripheral side of the diaphragm 37, and the outer peripheral portion reinforced thereby is press-fitted into the upper end side of the casing body 31a and fixed in an in-fitted state. Yes.

  As described above, a buffer solution such as ethylene glycol is sealed in the hollow portion partitioned inside the rubber elastic body 33, and the vibration of the power plant P input to the rubber elastic body 33 is absorbed and reduced. A liquid chamber 40 is formed. The inside of the liquid chamber 40 is partitioned up and down by the partition plate 36, and the lower side thereof is a pressure receiving chamber whose volume is increased or decreased with the deformation of the rubber elastic body 33. In addition, the upper side of the liquid chamber 40 is an equilibrium chamber that absorbs fluctuations in the volume of the pressure receiving chamber, with the volume expanded or reduced by the deformation of the diaphragm 37.

  That is, an annular orifice passage 39 surrounded by the casing body 31a and the flange portion and the inner cylinder portion of the diaphragm 37 is formed above the outer peripheral portion of the partition plate 36 so as to extend in the circumferential direction. One end of the orifice passage 39 opens toward the pressure receiving chamber below the liquid chamber 40, while the other end of the orifice passage 39 opens toward the equilibrium chamber above the liquid chamber 40. The buffer solutions in the pressure receiving chamber and the equilibrium chamber are circulated through the orifice passage 39, so that low-frequency vibrations acting on the pressure receiving chamber from the rubber elastic body 33 are attenuated. Therefore, the rubber elastic body 33, the partition plate 36, the diaphragm 37, the orifice passage 39, and the liquid chamber 40 are provided between the vehicle body side member and the power plant side member, and the power plant side member is used as the vehicle body side member. An elastic support means for elastically supporting is configured. In this embodiment, the vibration-proof mount device 3 is a liquid seal mount as described above, but the elastic support means may be only the rubber elastic body 33.

  Stopper rubbers 41 and 42 for restricting the upward movement of the casing body 31a by contacting the upper part 34a of the supporting member 34 from below on the front and rear sides of the casing 31 on the upper surface of the casing body 31a. Is provided. The stopper rubber 41 on the front side of the vehicle extends downward along the casing main body 31a, and the extended portion abuts against the front side of the vehicle of the support member 34 from the rear, so that the front of the casing main body 31a is in front of the vehicle. The movement to is restricted. The movement of the casing body 31a to the rear of the vehicle is not limited by the stopper rubber 42, but is performed by a swing restricting mechanism described later having the same function as the torque rod.

  An annular rubber layer 45 is formed on the outer periphery of the lower end portion of the casing body 31a so as to be connected to the rubber elastic body 33, and both front and rear end portions thereof bulge downward. The protruding portions 45a and 45a are in contact with the lower portion 34b of the support member 34 from above, so that the downward movement of the casing body 31a is restricted.

  4 and 5 show a state in which no load is applied to the mount main body 30. In this state, the stopper rubbers 41 and 42 are in contact with the upper part 34a of the support member 34. In the 1G state where the power plant P is supported by the mounts 3 and 5 and the static load of the power plant P is applied to the mount main body 30 of the engine-side mount 3, the rubber elastic body 33 is bent and the casing 31 is moved downward. Therefore, a predetermined gap is formed between the stopper rubbers 41 and 42 and the upper part 34a of the support member 34.

(Swing control mechanism)
In addition to the mount body 30 having the above-described structure, the engine-side mount 3 is integrally provided with a swing restricting mechanism that is a characteristic part of the present invention as shown in FIGS. .

  First, the support member 34 and the casing 31 have opposed surfaces 34f and 31d that face each other in the vehicle front-rear direction when mounted and fixed to the side frame 6 and the power plant P, respectively. That is, the vehicle front side of the vehicle rear side portion 34d of the support member 34 and the front end surface (vehicle rear surface) of the protruding portion 31c formed on the casing body 31a so as to protrude rearward of the vehicle are the facing surfaces 34f and 31d, respectively. Both of them extend vertically.

  The swing restricting mechanism is attached and fixed to one of the opposing surfaces 34f and 31d (the facing surface 31d on the casing 31 side in the present embodiment) and the other of the opposing surfaces 34f and 31d when the power plant P swings in the roll direction. It has a regulating member 61 that regulates the swing by abutting against the opposing surface (the opposing surface 34f on the support member 34 side).

  The regulating member 61 includes a substantially rectangular parallelepiped rubber member 62 having an attachment surface 62a attached and fixed to the opposing surface 31d on the casing 31 side, and an abutment surface 62b abutting on the opposing surface 34f on the support member 34 side, The rubber member 62 is provided between the mounting surface 62a and the contact surface 62b, and has a substantially horizontal direction (that is, the vehicle width direction) whose axis is perpendicular to the facing direction of the both facing surfaces 34f and 31d (that is, the vehicle longitudinal direction). ) And a cylindrical member 63 that is open at both ends in the axial direction. In the present embodiment, the cylindrical member 63 is made of a thin metal plate, and is entirely embedded in the rubber member 62. Further, the cross section of the cylindrical member 63 (that is, both end surfaces in the axial direction as viewed from the vehicle width direction) has an elliptical shape with the major axis extending substantially in the vertical direction.

With the configuration of the swing restricting mechanism, when the contact surface 62b of the rubber member 62 contacts the opposing surface 34f on the support member 34 side and receives a pressing force in the vehicle longitudinal direction, the rubber member 62 is compressed in the vehicle longitudinal direction. (The cylindrical member 63 is also compressed) and firmly receives the pressing force. During compression of the rubber member 62, the casing 31 is vibrated up and down relative to the support member 34, the tubular member 63 or pivot axis thereof or axial mind axis parallel around the tubular member 6 3 When the portion on the mounting surface 62a side and the portion on the contact surface 62b side are displaced in the vertical direction, the entire regulating member 62 is sheared up and down.

  The end portions of the rubber member 62 on both the upper surface, the lower surface, and both sides in the vehicle width direction gradually spread outward toward the mounting surface 62a so that the area of the mounting surface 62a increases.

(Transmission side mount structure)
As shown in FIGS. 6 and 7, the transmission-side mount 5 includes an outer cylinder 51 that is fixedly attached to the side frame 7 so that its axis extends in the vehicle front-rear direction, and a concentric inner side of the outer cylinder 51. And an elastic body (not shown) that is provided between the outer cylinder 51 and the inner cylinder 52 and elastically supports the inner cylinder 52 with respect to the outer cylinder 51. The inner cylinder 52 is configured to be movable in the radial direction and the axial direction (vehicle longitudinal direction) with respect to the outer cylinder 51 by deformation of the elastic body. Both end portions in the axial direction of the inner cylinder 52 protrude outward from both end surfaces in the axial direction of the outer cylinder 51, and are spaced apart in the vehicle front-rear direction by the transmission-side mount bracket 23 fixed to the transmission case 20. Are fixed by screws 56 to two standing wall portions 23a, 23a which are vertically arranged. Accordingly, the inner cylinder 52 and the mount bracket 23 constitute a power plant side member that is attached and fixed to the power plant P.

  An outer cylinder mounting bracket 55 for fixing the outer cylinder 51 to the side frame 7 is fixed to the outer peripheral surface of the outer cylinder 51, and the outer cylinder is interposed via the outer cylinder mounting bracket 55. A body 51 is fixed to the upper surface and side surfaces of the side frame 7. Thus, the outer cylinder body 51 and the outer cylinder body mounting bracket 55 constitute a vehicle body side member that is mounted and fixed to the vehicle body.

  The outer cylinder 51 and the mount bracket 23 have opposing surfaces 51b and 23b that face each other in the vehicle front-rear direction when mounted and fixed to the side frame 7 and the power plant P, respectively. That is, the vehicle front side surface of the projecting portion 51 a formed so as to protrude downward in a plan view in the lower part of the outer cylindrical body 51 and the vehicle rear surface of the standing wall portion 23 a on the vehicle front side of the mount bracket 23 are formed. The opposing surfaces 51b and 23b are both extended in the vertical direction.

  The transmission side mount 5 is also provided with a swing restriction mechanism similar to the engine side mount 3. In other words, the swing restricting mechanism is attached and fixed to one of the opposing surfaces 51b and 23b (in this embodiment, the opposing surface 51b on the outer cylinder 51 side) and when the power plant P swings in the roll direction. It has a regulating member 61 that regulates the swing by abutting against the other facing surface (facing surface 23b on the mount bracket 23 side). The restricting member 61 is composed of a rubber member 62 and a cylindrical member 63 similar to those of the engine side mount 3 (the same reference numerals are given since they are the same as those of the engine side mount 3). ).

(Function and effect)
Therefore, in the present embodiment, when the automobile is stopped and the engine 1 is in the idle operation state, low-frequency idle vibration caused by torque fluctuation or the like is absorbed by the rubber elastic body 33 of the mount main body 30 to the vehicle body. Vibration transmission is suppressed. At this time, in the engine side mount 3, the stopper rubbers 41 and 42 of the mount main body 30 are separated from the support member 34, so that idle vibration is not transmitted to the vehicle body side through these.

  On the other hand, when a large driving reaction force (torque) is applied, for example, during the rapid acceleration of an automobile, the power plant P rotates about the roll axis R as schematically shown by the white arrow in FIG. While rolling (rolling) as a whole, it tends to swing in the longitudinal direction of the vehicle like a pendulum about the upper swinging support shaft L. That is, the power plant P swings in the roll direction. Due to this swing, the casing 31 moves rearward of the vehicle in the engine-side mount 3, and the contact surface 62b of the rubber member 62 of the swing restriction mechanism contacts the opposing surface 34f on the support member 34 side. The rubber member 62 is sandwiched between the opposing surfaces 34f and 31d and pressed and compressed in the vehicle front-rear direction (the cylindrical member 63 is also compressed simultaneously). Further, in the transmission-side mount 5, the mount bracket 23 moves rearward of the vehicle, the facing surface 23b on the mount bracket 23 side comes into contact with the contact surface 62b of the rubber member 62, and the rubber member 62 faces both sides. It is sandwiched between the surfaces 51b and 23b and pressed and compressed in the vehicle longitudinal direction (the cylindrical member 63 is also compressed simultaneously). By restricting the pressing force (compressive force) in the vehicle front-rear direction, that is, the force for swinging the power plant P in the roll direction (particularly turning around the roll axis R) by the entire regulating member 61, the swing is regulated. Thereby, the oscillation is effectively suppressed. The swing in the roll direction (particularly swinging like a pendulum) is also restricted by the independent torque rod 8 at the lower end of the power plant P. The independent torque rod 8 is not always necessary. When the engine 1 has a low output, the roll of the power plant P can be achieved by using only the swing restricting mechanism provided on each of the mounts 3 and 5. The swing of the direction can be restricted.

  When the rubber member 62 (regulating member 61) of the swing restricting mechanism is compressed, there is a concern that the vertical vibration of the power plant P is transmitted to the vehicle body side through the rubber member 62. As described above, the rubber Since the cylindrical member 63 is disposed in the member 62 so that its axis extends in the vehicle width direction, the casing 31 vibrates up and down with respect to the support member 34, and the mount bracket 23 is moved to the outer cylindrical body 51. However, even if the cylindrical member 63 vibrates up and down, the cylindrical member 63 rotates around its axis or an axis parallel to the axial center, or the portion of the cylindrical member 63 on the mounting surface 62a side and the contact surface 62b side The entire regulating member 61 is easily sheared up and down by being shifted in the vertical direction from each other. As a result, the vertical vibration of the power plant P becomes difficult to be transmitted to the vehicle body side via the rubber member 62, and even if the swing restricting mechanism is activated (that is, the rubber member 62 is compressed), The rise of the vertical movement springs of the entire mounts 3 and 5 with respect to the mount is considerably small. In addition, since the cylindrical member 63 is made of metal, the static motion ratio of the entire regulating member 61 can be reduced and the frequency dependency can be reduced as compared with the rubber member 62 alone. Therefore, even if the vertical vibration of the power plant P increases during the rapid acceleration of the engine, the transmission of the vertical vibration to the vehicle body side is effectively suppressed, and the acceleration booming noise in the vehicle interior increases. Absent.

(Modification example of restriction member)
In the above embodiment, the entire cylindrical member 63 of the regulating member 61 is embedded in the rubber member 62, but both axial ends of the cylindrical member 63 are outside the rubber member 62 as shown in FIG. 8. It is preferable that each be configured to protrude. That is, the length of the cylindrical member 63 is made longer than the length of the rubber member 62 in the axial direction (vehicle width direction) of the rubber member 62, and both ends in the axial direction of the cylindrical member 63 are the cylindrical members in the rubber member 62. Project from both end faces in the axial direction. By doing so, it is possible to prevent the rubber member 62 from being cracked by the two corners where the peripheral side surface of the cylindrical member 63 and both end surfaces in the axial direction intersect, and the durability of the rubber member 62 can be improved.

  Moreover, in the said embodiment, although the both end surfaces of the cylindrical member axial direction in the rubber member 62 were made into planar shape, as shown in FIG. 9, it is preferable to form the recessed parts 62c and 62c in these both end surfaces, respectively. As shown in the figure, each of the recesses 62c is preferably formed in an arc shape so that the amount of the recess increases toward the center of the end face, but is not limited thereto. Due to the recess 62c, when the rubber member 62 is compressed in the vehicle front-rear direction, both end surfaces of the rubber member 62 in the axial direction of the cylindrical member do not bulge outward, and the linear characteristic between the amount of deflection and the load is reduced. The area shown can be expanded.

  Furthermore, as shown in FIGS. 10 to 12, it is preferable to form a straight 62 d (hollow portion) in the inner portion of the cylindrical member 63 in the rubber member 62. The tickling 62d may be formed on the entire inner part of the cylindrical member 63 (see FIG. 10) or may be formed on a part (see FIGS. 11 and 12). Due to such tickling 62d, when the pressing force in the vehicle front-rear direction is received by the rubber member 62 and the cylindrical member 63, a large burden is imposed on the cylindrical member 63, so that the static ratio of the entire regulating member 61 is increased. Can be further reduced, and the absorption performance of vertical vibration can be improved. This tick 62d may penetrate through the rubber member 62 in the cylindrical member axial direction.

  Furthermore, as shown in FIG. 13, the rubber member 62 is composed of an attachment surface side portion 62e and an abutment surface side portion 62f that are provided away from each other in the vehicle front-rear direction, and the cylindrical member 63 is formed of these attachment surfaces. The side part 62e and the contact surface side part 62f may be provided across the both side parts 62e and 62f so as to be connected. In this case, as shown in the drawing, the rubber member 62 may be provided with a connecting portion 62g for connecting the attachment surface side portion 62e and the contact surface side portion 62f (in the drawing, a cylindrical member 63). The connecting portion 62g is provided so as to surround the upper end portion and the lower end portion, but may be provided at another location). With such a configuration, the same effect as that obtained when the curb 62d is formed can be obtained, and the attachment surface side portion 62e and the contact surface side portion 62f of the rubber member 62 can be easily displaced in the vertical direction. The member 34 and the casing 31 or the outer cylinder body 51 and the inner cylinder body 52 are relatively easily displaced up and down.

Further, in addition to this configuration, as shown in FIG. 14, chamfering 62h and 62h (in the figure, R chamfering is used, but C chamfering is performed at both corners where the mounting surface 62a of the rubber member 62 intersects the upper surface and the lower surface. It is good to give it. As a result, the portion of the mounting surface side portion 62e of the rubber member 62 opposite to the mounting surface 62a is easily deformed in the vertical direction with respect to the mounting surface 62a, and the vertical shear deformation of the entire regulating member 61 is further facilitated. Is called. The same effect can be obtained by chamfering 62h only on one of the corners .

  Moreover, the material of the cylindrical member 63 is not limited to metal, and may be resin as long as it can withstand the pressing force in the vehicle front-rear direction. The type of metal is not particularly limited.

  Furthermore, in each of the above embodiments, the present invention is applied to both the engine side mount 3 and the transmission side mount 5, but only one of them may be used. In that case, you may make it provide a torque rod in the mount of the side which does not apply this invention.

  The vibration-proof mount device of the present invention is useful for elastic support of at least one end of a power plant mounted on a vehicle so that the longitudinal direction is the vehicle width direction and both ends are elastically supported with respect to the vehicle body. In particular, it is useful for those provided with a rocking regulation mechanism for regulating the rocking of the power plant in the roll direction.

1 is a perspective view showing a schematic configuration of an engine mount system using a vibration-proof mount device according to an embodiment of the present invention. It is explanatory drawing which shows typically a mode that a driving reaction force (torque) acts, seeing a power plant from the vehicle left side. It is a top view which shows the structure of the engine side mount as a vibration proof mount apparatus which concerns on embodiment of this invention. It is the side view which looked at the engine side mount from the vehicle width direction. It is a fragmentary sectional view which shows the internal structure of the mount main-body part of an engine side mount. It is a top view which shows the structure of the transmission side mount as a vibration proof mount apparatus which concerns on embodiment of this invention. It is the front view which looked at the transmission side mount from the vehicle front. It is a top view which shows the modification of a control member. It is a top view which shows another modification of a control member. It is sectional drawing which shows another modification of a control member. It is sectional drawing which shows another modification of a control member. It is sectional drawing which shows another modification of a control member. It is sectional drawing which shows another modification of a control member. It is sectional drawing which shows another modification of a control member.

P Power plant 3 Engine side mount (anti-vibration mount device)
5 Transmission-side mount (anti-vibration mount device)
6 Side frame (car body)
7 Side frame (car body)
23 Transmission side mounting bracket ( Power plant side member)
23b Opposing surface 31 Casing (power plant side member)
31d Opposing surface 32 Connecting bracket (vehicle body side member)
33 Rubber elastic body (elastic support means)
34 Support member (vehicle body side member)
34f Opposing surface 36 Partition plate (elastic support means)
37 Diaphragm (elastic support means)
39 Orifice passage (elastic support means)
40 Liquid chamber (elastic support means)
51 Outer cylinder (vehicle body side member)
51b Opposing surface 52 Inner cylinder (power plant side member)
55 Outer cylinder mounting bracket (vehicle body side member)
61 Restricting member 62 Rubber member 62a Mounting surface 62b Abutting surface 62c Recessed portion 62d Straight (hollow portion)
62e Mounting surface side portion 62f Contact surface side portion 62h Chamfer 63 Cylindrical member

Claims (6)

Used for elastic support of at least one of the both ends of the power plant mounted on the vehicle so that the longitudinal direction is the vehicle width direction and both ends are elastically supported with respect to the vehicle body, and the roll direction of the power plant An anti-vibration mount device provided with a rocking regulation mechanism for regulating the rocking of
A vehicle body side member fixed to the vehicle body;
A power plant side member attached and fixed to the power plant;
An elastic support means provided between the vehicle body side member and the power plant side member, and elastically supporting the power plant side member with respect to the vehicle body side member;
The vehicle body side member and the power plant side member have opposing surfaces that face each other in the vehicle longitudinal direction when mounted and fixed to the vehicle body and the power plant, respectively.
The swing restricting mechanism is attached and fixed to one of the opposing surfaces of the vehicle body side member and the power plant side member and abuts against the other opposing surface when swinging in the roll direction of the power plant. Having a regulating member to regulate,
The restricting member is provided between a rubber member having an attachment surface fixedly attached to the one opposing surface and an abutting surface in contact with the other opposing surface, and between the attachment surface and the abutting surface of the rubber member. A cylindrical member having an axial center extending in a substantially horizontal direction perpendicular to the opposing direction of the opposing surfaces and having both axial ends open ,
The cross-section of the cylindrical member has an elliptical shape with the major axis extending substantially in the vertical direction,
The cylindrical member receives vertical vibrations of the power plant side member with respect to the vehicle body side member when the restriction member abuts against the other facing surface and is compressed in the vehicle front-rear direction. An anti-vibration mount device configured to be shear-deformed in the vertical direction . The anti-vibration mount device according to claim 1 ,
Both ends of the cylindrical member in the axial direction protrude to the outside of the rubber member, respectively. The vibration-proof mount device according to claim 1 or 2 ,
An anti-vibration mount device, wherein concave portions are respectively formed on both end surfaces of the rubber member in the cylindrical member axial direction. In the vibration-proof mount apparatus as described in any one of Claims 1-3 ,
An anti-vibration mount device, wherein a hollow portion is formed in an inner portion of a cylindrical member in a rubber member. In the vibration-proof mount apparatus as described in any one of Claims 1-3 ,
The rubber member has a mounting surface side portion and a contact surface side portion provided apart from each other,
The anti-vibration mount device is characterized in that the cylindrical member is provided across the both side portions so as to connect the attachment surface side portion and the contact surface side portion. The anti-vibration mount device according to claim 5 ,
An anti-vibration mount device in which chamfering is applied to at least one of both corners of the rubber member where the mounting surface intersects the upper surface and the lower surface.

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