JP2012202418A - Engine mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize and provide an engine mount in a simple and compact structure, including a displacement regulating means which enables lateral relative displacement of a first attachment member to a second attachment member to be stably limited.SOLUTION: In a portal bracket 54, a first stopper piece 76 partially covering one side opening 72, as well as a second stopper piece 78 for partially covering the other side opening 74, are provided away from a coupling 20 of the first attachment member 12. In lateral projection, both the first and second stopper pieces 76 and 78 overlap a body 18 of the first attachment member 12. A lateral displacement regulating means is provided, which regulates the lateral relative displacement of the first attachment member 12 to the second attachment member 14 by the contact between the first and second stopper pieces 76 and 78 and the body 18. In addition, the first and second stopper pieces 76 and 78 extend below from the contact area with the body 18.

Description

  The present invention relates to an engine mount for vibration-proofing a power unit and a vehicle body in an automobile or the like, and more particularly to an engine mount having a portal bracket attached to a second attachment member.

  2. Description of the Related Art Conventionally, there is an engine mount for vibration-proof coupling between a power unit and a vehicle body in an automobile or the like. For example, as described in Japanese Patent Application Laid-Open No. 2009-196512 (Patent Document 1), an engine mount is mounted on a mount body in which a first mounting member and a second mounting member are connected by a main rubber elastic body. In addition, a portal bracket having a pair of leg portions and a top plate portion connecting the upper end portions of the leg portions is attached. More specifically, the first mounting member includes a main body portion fixed to the main rubber elastic body, and a connecting portion that extends from the main body sideward, and the connecting portion is one of the portal brackets. It protrudes to the side from the side opening of and is attached to the power unit.

  By the way, in such an engine mount, in order to ensure the durability of the rubber elastic body of the main body and the running stability of the automobile, the first mounting member and the second mounting member associated with engine vibration, input from the road surface, etc. It is desirable that the relative displacement is limited. In the engine mount disclosed in Patent Document 1, the relative displacement of the first mounting member with respect to the second mounting member is such that the vehicle front-rear direction (the first mounting member and the leg is opposed) and the vertical direction (first In the direction in which the mounting member and the top plate portion face each other), the first mounting member and the portal bracket are prevented from contacting each other.

  However, in such a displacement restricting structure based on the contact between the first mounting member and the gate bracket, the side of the first mounting member with respect to the second mounting member (the opening direction of the gate bracket in the left-right direction of the vehicle). There was a problem that it was difficult to limit the relative displacement to.

  In JP-A-2006-161973 (Patent Document 2), a window portion is formed on the top plate portion of the portal bracket, and a protruding portion protruding upward from the first mounting member is formed on the window portion. The structure is inserted and the relative displacement of the first mounting member to the side with respect to the second mounting member is restricted by the protrusion of the first mounting member coming into contact with the inner peripheral surface of the window. Are disclosed. However, in order to employ the displacement restricting means described in Patent Document 2, the top plate portion of the gate-shaped bracket is made sufficiently large so that the protruding portion of the first mounting member and the inner periphery of the window portion It is necessary to provide a window portion of a size that can sufficiently secure the distance between the opposing surfaces (stopper clearance) with the surface while ensuring the strength of the top plate portion. Therefore, when the size of the engine mount is limited depending on the size of the installation space, it may be difficult to employ the engine mount provided with such a displacement restricting means.

JP 2009-196512 A JP 2006-161973 A

  The present invention has been made in the background of the above-described circumstances, and the problem to be solved is that the relative displacement of the first mounting member in the lateral direction with respect to the second mounting member can be stably limited. The object is to provide an engine mount provided with a displacement regulating means in a simple and compact manner.

  That is, according to the first aspect of the present invention, the first attachment member and the second attachment member are connected by the main rubber elastic body, and the main body portion is attached to the main rubber elastic body. And a connecting portion extending laterally from the main body, and a pair of legs fixed to the second mounting member, and the legs are connected to the second mounting member. And a top bracket portion having a top plate portion attached thereto, the top plate portion of the gate bracket being disposed across the first attachment member, and the first attachment member In the engine mount in which the connecting portion extends from one side opening of the portal bracket and is attached to the power unit, the portal bracket includes the one side opening of the portal bracket. A first stopper piece partially covering And a second stopper piece that partially covers the other side opening of the portal bracket and is provided on the side of the portal bracket. The first stopper piece and the second stopper piece overlap with the main body portion of the first mounting member in the projection at, and the first stopper piece, the second stopper piece, and the main body portion are overlapped with each other. Side displacement restricting means for restricting the relative displacement of the first attachment member to the side of the second attachment member by contact is provided, and the first stopper piece and the second stopper are provided. The piece extends below the contact portion of the first mounting member with respect to the main body.

  According to the engine mount having the structure according to the first aspect of the present invention, when the first mounting member is largely displaced laterally with respect to the second mounting member due to vibration input or the like, the side The displacement amount of the first mounting member is limited by the direction displacement restricting means. Therefore, damage to the main rubber elastic body caused by excessive relative displacement between the first mounting member and the second mounting member is avoided, and durability is improved.

  Further, the lateral displacement restricting means includes a first stopper piece and a second stopper piece, and the first stopper piece and the second stopper piece cover the side opening of the portal bracket. It is provided as follows. Therefore, an increase in the size of the gate bracket due to the provision of the lateral displacement restricting means is prevented.

  In addition, since the first stopper piece is provided so as to be disengaged from the connecting portion of the first mounting member that protrudes laterally from the portal bracket, the first mounting member does not need to be enlarged, and the lateral side The engine mount provided with the displacement restricting means can be realized in a compact manner.

  Further, the first stopper piece and the second stopper piece extend below the contact portion with the first mounting member. Therefore, even when the relative position in the vertical direction of the first mounting member and the gate bracket changes due to the input of the support load of the power unit over a long period of time, the first stopper piece. And the overlap in the projection by the side of the 2nd stopper piece and the 1st attachment member is maintained, and the stopper effect at the side is exhibited effectively.

  Furthermore, since the change in the contact area between the first stopper piece and the second stopper piece and the first mounting member is also suppressed, the characteristic change at the time of contact with respect to the initial state can be suppressed, and the desired prevention can be achieved. Vibration performance is maintained.

  According to a second aspect of the present invention, in the engine mount described in the first aspect, the first stopper piece is opposed to one end of the main body in the opposing direction of the pair of legs. And the second stopper piece is provided to face the other end of the main body.

  According to the second aspect, rotation of the first mounting member due to the displacement of the power unit is prevented by the contact of the first stopper piece and the second stopper piece with the main body portion of the first mounting member. The As a result, torsional deformation of the main rubber elastic body is prevented, excellent durability is realized, and displacement of the power unit is limited, thereby improving running stability in an automobile or the like.

  According to a third aspect of the present invention, in the engine mount described in the first or second aspect, the first stopper piece extends from one of the pair of leg portions and the top plate portion. In addition, the second stopper piece extends from one of the pair of leg portions and the top plate portion.

  According to the third aspect, rotation of the first mounting member due to the displacement of the power unit is prevented by the contact between the first stopper piece and the second stopper piece and the main body portion of the first mounting member. The As a result, torsional deformation of the main rubber elastic body is prevented, excellent durability is realized, and displacement of the power unit is limited, thereby improving running stability in an automobile or the like.

  The first stopper piece and the second stopper piece are both supported by the leg portion and the top plate portion. Therefore, the first stopper piece and the second stopper piece are provided with sufficient support rigidity to prevent damage such as deformation due to contact with the first attachment member, and the first attachment member of the first attachment member. It is possible to effectively realize the displacement restriction for the second mounting member.

  And since the connection part of a leg part and a top-plate part is reinforced with the 1st stopper piece and the 2nd stopper piece in a portal bracket, the intensity | strength of the portal bracket itself is raised. As a result, it may be possible to simplify the reinforcing structure of the portal bracket and to reduce the member dimensions such as thickness.

  According to the present invention, the lateral displacement of the first mounting member relative to the second mounting member is limited by the lateral displacement restricting means, so that the main rubber elastic body is prevented from being damaged. The improvement of the property is achieved. The first and second stopper pieces constituting the side displacement restricting means are provided so as to cover the side opening of the portal bracket, and the first stopper piece serves as a connecting portion of the first mounting member. Since the first mounting member and the gate bracket are significantly enlarged due to the provision of the lateral displacement restricting means, it is possible to avoid a significant increase in size. Furthermore, since the first and second stopper pieces protrude further downward than the contact portion with the first mounting member, the first mounting member is initially caused by long-term load input or the like. Even when the position is lower than the position, the displacement restriction effect by the side displacement restriction means can be obtained effectively.

The perspective view which shows the engine mount as one Embodiment of this invention. The perspective view which shows the engine mount shown by FIG. 1 at another angle. FIG. 3 is a longitudinal sectional view of the engine mount shown in FIG. 1, which is a sectional view taken along line III-III in FIG. 4. IV-IV sectional drawing of FIG. The perspective view of the mount main body which comprises the engine mount shown by FIG. The perspective view which shows the mount main body shown by FIG. 5 at another angle. The perspective view of the portal bracket which comprises the engine mount shown by FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 show an automobile engine mount 10 as one embodiment of the present invention. The engine mount 10 has a mount main body 11, and as shown in FIGS. 5 and 6, the mount main body 11 connects the first mounting member 12 and the second mounting member 14 to the main rubber elastic body 16. It is made into the structure connected elastically. In the following description, unless otherwise specified, the vertical direction is the vertical direction in FIG. 3 that is a substantially vertical vertical direction when mounted on the vehicle, and the front-rear direction is approximately the vehicle front-rear direction when mounted on the vehicle. The right and left directions in FIG. 3 that are directions, and the left and right directions are respectively the lower and upper directions in FIG. 4 that are substantially the left and right directions of the vehicle when mounted on the vehicle.

  More specifically, as shown in FIGS. 4 to 6, the first mounting member 12 has a structure integrally including a main body 18 and a connecting portion 20, such as iron or aluminum alloy. It is set as the highly rigid member formed by. As shown in FIGS. 3 and 4, the main body 18 has a thick plate shape that has a substantially hexagonal shape when viewed in the left-right direction. The connecting portion 20 extends from the rear end portion of the main body portion 18 toward the side (inward in the vehicle left-right direction), is narrower in the front-rear direction than the main body portion 18, and extends from the main body portion 18. A proximal end support portion 22 and a distal end attachment portion 24 that is provided on the distal end side of the proximal end support portion 22 and is wider in the front-rear direction than the proximal end support portion 22 are integrally formed. In addition, a plurality of bolt holes 26 are provided in the tip mounting portion 24 of the connecting portion 20 so as to penetrate vertically.

  A buffer rubber 28 is attached to the first attachment member 12. The buffer rubber 28 has a rebound stopper rubber 30 that is plate-shaped or band-shaped, and a front stopper rubber 32 and a rear stopper rubber 34 that protrude downward from both front and rear ends of the rebound stopper rubber 30. Further, the buffer rubber 28 is a thin plate-like right stopper rubber 36 extending rearward from the right end of the front stopper rubber 32 and a thin plate-like leftward extending forward from the left end of the rear stopper rubber 34. And a stopper rubber 38. The shock-absorbing rubber 28 is attached to the main body 18 of the first mounting member 12 from above. The rebound stopper rubber 30 is superimposed on the upper surface of the main body 18. , 34, 36, and 38 are fitted on the upper portion of the outer peripheral surface of the main body 18.

  On the other hand, the second mounting member 14 has a thin plate or band shape as shown in FIGS. 3, 5, 6, and the like, and is made of the same material as the first mounting member 12. The formed high-rigidity member. Further, the second mounting member 14 has a central portion in the front-rear direction as a central fixing portion 40 that is located above the both end portions with a stepped shape, and the front and rear end portions face inward in the front-rear direction. The taper portions 42 and 42 are inclined downward. Furthermore, the front and rear direction both ends of the second mounting member 14 are provided with a pair of end mounting pieces 44, 44 that are formed in a flat plate shape that extends substantially horizontally and is positioned below the central fixing portion 40. A connecting portion between the central fixing portion 40 and the pair of end attachment pieces 44, 44 is a pair of intermediate fitting portions 46, 46 extending vertically. A bolt hole 48 is formed in each of the pair of end attachment pieces 44, 44 so as to penetrate in the thickness direction.

  The first mounting member 12 and the second mounting member 14 are such that the main body portion 18 of the first mounting member 12 is spaced apart upward from the central fixing portion 40 of the second mounting member 14. The main body 18 and the central fixing portion 40 are elastically connected by the main rubber elastic body 16. The main rubber elastic body 16 has a substantially C shape when viewed in the left-right direction, and its upper end is vulcanized and bonded to the lower surface of the first mounting member 12 and its lower end is the center of the second mounting member 14. The taper portions 42 and 42 of the fixing portion 40 are vulcanized and bonded. In the present embodiment, the main rubber elastic body 16 is formed as an integral vulcanization molded product including the first mounting member 12 and the second mounting member 14.

  Further, a bound stopper rubber 50 is fixed to the central portion in the front-rear direction of the central fixing portion 40 of the second mounting member 14. The bound stopper rubber 50 is a protruding rubber elastic body that gradually becomes narrower upward, and protrudes upward from the central fixing portion 40 of the second mounting member 14, so that the first mounting member 12. The main body 18 is opposed to the main body 18 with a predetermined distance in the vertical direction. The bound stopper rubber 50 is disposed between the front and rear directions of the lower end portion of the main rubber elastic body 16 and is integrally formed with the main rubber elastic body 16.

  Further, a seal rubber layer 52 is formed on each of the intermediate fitting portions 46 of the second mounting member 14. The seal rubber layer 52 is a thin rubber elastic body integrally formed with the main rubber elastic body 16 and extends downward from both front and rear end portions of the main rubber elastic body 16 so as to extend in the front-rear direction of the intermediate fitting portions 46, 46. Vulcanized and bonded to the outer surface.

  As shown in FIGS. 1 to 4, a portal bracket 54 is attached to the mount body 11 having such a structure. The portal bracket 54 is a high-rigidity member formed of iron, aluminum alloy or the like, and as shown in FIG. 7, a pair of leg portions 56a and 56b and upper ends of the leg portions 56a and 56b. And a top plate portion 58 for connecting the two.

  The leg portion 56 includes a plate-like leg main body 60 that extends in a substantially vertical direction with a predetermined width dimension in the left-right direction, and a plate-like reinforcing rib 62 that protrudes outward in the front-rear direction from both widthwise ends of the leg main body 60. Are integrated. Further, a leg attachment piece 64 that extends substantially horizontally toward the outside in the front-rear direction is integrally formed at the lower end of the leg portion 56, and a bolt hole 66 penetrates the leg attachment piece 64 in the thickness direction. Is provided.

  The top plate portion 58 includes a plate-shaped top plate body 68 extending in the front-rear direction with a predetermined width dimension in the left-right direction, and plate-shaped reinforcing ribs 70 protruding upward from both ends in the width direction of the top plate body 68. Are integrated.

  The top plate portion 58 is integrally formed so as to connect the upper end portions of the pair of leg portions 56a and 56b, thereby forming a gate bracket 54. That is, the top plate main body 68 of the top plate portion 58 is integrally formed between the upper ends of the leg main portions 60, 60 of the leg portions 56a, 56b, and the reinforcing rib 70 of the top plate portion 58 is formed of the leg portions 56a, 56b. The reinforcing ribs 62 and 62 of the 56b are integrally formed across the upper ends. The portal bracket 54 can be obtained, for example, by integrally forming the pair of leg portions 56a and 56b and the top plate portion 58 by casting or pressing.

  The portal bracket 54 is attached to the mount body 11. That is, the mount main body 11 is inserted from the lower opening of the portal bracket 54, and the pair of leg portions 56 a and 56 b of the portal bracket 54 is connected to the intermediate fitting portion 46 of the second mounting member 14 in the mount main body 11. Is sandwiched in the front-rear direction, whereby the portal bracket 54 is attached to the second attachment member 14. Further, the leg main bodies 60 of the pair of leg portions 56 a and 56 b of the portal bracket 54 are overlapped with the front and rear outer surfaces of the intermediate fitting portion 46 of the second mounting member 14 via the seal rubber layer 52. Yes.

  In the mounting state of the portal bracket 54 to the mount body 11, the connecting portion 20 of the first mounting member 12 extends from the right opening 72 of the portal bracket 54 to the right, and is connected. A part of the base end support portion 22 and the distal end attachment portion 24 in the portion 20 protrude sideward (rightward) from the portal bracket 54. On the other hand, the top plate portion 58 of the portal bracket 54 is disposed across the upper portion of the main body portion 18 of the first mounting member 12, and the main body portion 18 of the first mounting member 12 is connected to the portal bracket 54. Without projecting from the left side opening 74, it is disposed in a region surrounded by the pair of leg portions 56 a and 56 b and the top plate portion 58. In the portal bracket 54, one side opening is a right side opening 72 and the other side opening is a left side opening 74.

  When the portal bracket 54 is attached to the mount body 11, the body 18 of the first mounting member 12 is a predetermined distance from the legs 56 a and 56 b and the top plate 58 of the portal bracket 54. They are opposed to each other. Further, the end mounting piece 44 of the second mounting member 14 is vertically overlapped with the leg mounting piece 64 of the portal bracket 54, and the bolt hole 48 of the end mounting piece 44 and the leg mounting piece 64 are overlapped. Bolt holes 66 are positioned.

  In the engine mount 10 having such a structure, the tip mounting portion 24 of the connecting portion 20 of the first mounting member 12 is mounted to a power unit (not shown) via an inner bracket (not shown) and the second mounting member. 14 end attachment pieces 44, 44 and leg attachment pieces 64, 64 of the leg portions 56a, 56b of the portal bracket 54 are attached to a vehicle body (not shown). As a result, the power unit is connected to the vehicle body in an anti-vibration support or in an anti-vibration manner. The fixing of the first mounting member 12 to the power unit (bracket) and the fixing of the second mounting member 14 and the portal bracket 54 to the vehicle body are realized by fastening with bolts (not shown), for example. . Further, the end attachment pieces 44, 44 of the second attachment member 14 and the leg attachment pieces 64, 64 of the portal bracket 54 are fixed to the vehicle body by bolts (not shown), whereby the second attachment member 14 and the portal bracket 54 are bolted.

  When the vibration or inertial force of the power unit is input between the first mounting member 12 and the second mounting member 14, the relative displacement between the first mounting member 12 and the second mounting member 14 is a displacement restriction. Limited by means.

  Specifically, with respect to the input in the vertical direction, the upper displacement restricting means for restricting the upward displacement of the first attachment member 12 relative to the second attachment member 14 and the second of the first attachment member 12. A downward displacement restricting means for restricting the downward displacement of the mounting member 14 is provided. That is, the second attachment of the first attachment member 12 by the contact between the main body portion 18 of the first attachment member 12 and the top plate portion 58 of the portal bracket 54 via the rebound stopper rubber 30 of the buffer rubber 28. Upper displacement restricting means for restricting upward displacement (rebound direction) relative to the member 14 is configured. On the other hand, the second mounting member 14 of the first mounting member 12 is brought into contact with the main body portion 18 of the first mounting member 12 and the central fixing portion 40 of the second mounting member 14 via the bound stopper rubber 50. A downward displacement restricting means for restricting the downward displacement (bound direction) with respect to is configured.

  Further, with respect to an input in the front-rear direction, a forward displacement restricting means for restricting the forward displacement of the first attachment member 12 relative to the second attachment member 14 and a second attachment member of the first attachment member 12 Back displacement restricting means for restricting backward displacement with respect to 14 is provided. That is, the first mounting member 12 is moved forward with respect to the second mounting member 14 by the contact between the main body portion 18 of the first mounting member 12 and the leg portion 56a of the portal bracket 54 via the front stopper rubber 32. A forward displacement restricting means for restricting the displacement is configured. On the other hand, the first mounting member 12 is moved backward with respect to the second mounting member 14 by the contact between the main body portion 18 of the first mounting member 12 and the leg portion 56b of the portal bracket 54 via the rear stopper rubber 34. A rear displacement restricting means for restricting the displacement is configured.

  For left and right input, left displacement restricting means for restricting leftward displacement of the first attachment member 12 with respect to the second attachment member 14, and second of the first attachment member 12. A rightward displacement restricting means for restricting a rightward displacement with respect to the mounting member 14 is provided.

  More specifically, a first stopper piece 76 and a second stopper piece 78 are integrally formed on the portal bracket 54. Each of the first and second stopper pieces 76 and 78 has a plate shape and spreads substantially perpendicular to the left-right direction. Further, the first stopper piece 76 is integrally formed with the leg portion 56a and the top plate portion 58, and extends from the corner portion that is a connecting portion between the leg portion 56a and the top plate portion 58, and is opened to the right side. 72 is provided so as to cover a part of 72 (upper right part in FIG. 1). On the other hand, the second stopper piece 78 is integrally formed with the leg portion 56b and the top plate portion 58, and extends from the corner portion that is a connecting portion between the leg portion 56b and the top plate portion 58, and is opened to the left side. 74 is provided so as to cover a part of 74 (upper right part in FIG. 2). In other words, the first stopper piece 76 is integrally provided at the front end portion of the top plate portion 58 and protrudes downward, and its front end is integrally formed with the leg portion 56a. Two stopper pieces 78 are integrally provided at the rear side end portion of the top plate portion 58 and protrude downward, and the rear end thereof is integrally formed with the leg portion 56b.

  The first and second stopper pieces 76 and 78 are separated from the main body 18 of the first mounting member 12 by a predetermined distance in the left-right direction when the portal bracket 54 is attached to the mount main body 11. They face each other and partially overlap in the left-right projection. More specifically, the rear end portion of the first stopper piece 76 is opposed to the front end portion of the main body portion 18 of the first mounting member 12 in the left-right direction, and the right stopper rubber 36 is interposed between the opposed surfaces. It is arranged. Further, the front end portion of the second stopper piece 78 is opposed to the rear end of the main body portion 18 of the first mounting member 12 in the left-right direction, and a left stopper rubber 38 is disposed between the opposed surfaces. Yes.

  Further, as shown in FIG. 4, the first stopper piece 76 is connected to the main body portion 18 at a position where the proximal end support portion 22 of the connecting portion 20 of the first mounting member 12 is deviated forward. It is inserted between the surfaces of the portion 20 facing the tip mounting portion 24, and is separated from both the main body portion 18 and the tip mounting portion 24.

  The lateral displacement restricting means for restricting the displacement of the first attachment member 12 relative to the second attachment member 14 at the time of input in the left-right direction includes a rightward displacement restriction means by the first stopper piece 76, and a second displacement restriction means. It is comprised by the left side displacement control means by the stopper piece 78. FIG.

  That is, when the first mounting member 12 is displaced to the right with respect to the second mounting member 14, the main body portion 18 of the first mounting member 12 moves to the right with respect to the first stopper piece 76 of the portal bracket 54. The first mounting member 12 is abutted via the side stopper rubber 36, and the relative displacement of the first mounting member 12 with respect to the second mounting member 14 is limited in a buffering manner. Thereby, a rightward displacement restricting means for restricting the relative displacement of the first attachment member 12 to the right with respect to the second attachment member 14 is configured.

  Further, in the right displacement restricting means, since the buffer rubber 28 is fitted to the upper end portion of the first mounting member 12, the vertical middle portion of the rear end of the first stopper piece 76 is the first mounting portion. The first stopper piece 76 extends below the contact portion with the first mounting member 12.

  On the other hand, when the first mounting member 12 is displaced to the left with respect to the second mounting member 14, the main body portion 18 of the first mounting member 12 is left with respect to the second stopper piece 78 of the portal bracket 54. The first mounting member 12 relative to the second mounting member 14 is limited in a buffering manner. Thereby, a left displacement restricting means for restricting the relative displacement of the first attachment member 12 to the left with respect to the second attachment member 14 is configured.

  Further, in the left displacement restricting means, since the buffer rubber 28 is fitted to the upper end portion of the first mounting member 12, the vertical middle portion of the front end of the second stopper piece 78 is the first mounting member. 12, the second stopper piece 78 extends below the contact portion with respect to the first mounting member 12. The first stopper piece 76 and the second stopper piece 78 are formed with substantially the same projecting dimensions.

  According to the engine mount 10 having the structure according to this embodiment, the relative displacement of the first mounting member 12 with respect to the second mounting member 14 is such that the first mounting member 12 and the second mounting member 14 or Due to the contact with the gate-shaped bracket 54, the front-rear, left-right, and upper-lower directions are limited. Therefore, excessive deformation of the main rubber elastic body 16 is prevented, and durability is improved.

  Further, the first mounting member 12, the second mounting member 14, and the portal bracket 54 are brought into contact with each other via the buffer rubber 28 and the bound stopper rubber 50, and the displacement restriction effect by the contact is achieved. It is designed to be buffered. Therefore, the occurrence of hitting sound and vibration at the time of contact is prevented, and adverse effects on the vibration isolation performance are avoided. In the present embodiment, the right stopper rubber 36 and the left stopper rubber 38 are thinner than the front stopper rubber 32 and the rear stopper rubber 34. As a result, the displacement of the power unit in the vehicle front-rear direction is sufficiently flexibly limited to achieve excellent riding comfort, and the displacement of the power unit in the vehicle left-right direction is suppressed to be small, thereby improving running stability. .

  Further, the lateral displacement restricting means for restricting the displacement of the first attachment member 12 in the left-right direction with respect to the second attachment member 14 includes the main body portion 18 of the first attachment member 12 and the first of the portal bracket 54. The second stopper pieces 76 and 78 are in contact with each other. The first and second stopper pieces 76, 78 project inward and downward in the front-rear direction from the legs 56 a, 56 b and the top plate part 58 of the portal bracket 54, and the side openings 72, 74. It is provided to cover the upper corner. If the lateral displacement restricting means having such a structure is employed, the first and second stopper pieces 76 and 78 are prevented from projecting greatly outside the leg portions 56a and 56b and the top plate portion 58 in the left-right direction. Therefore, an increase in the size of the portal bracket 54 is avoided. In addition, since the first and second stopper pieces 76 and 78 are arranged to face each other on the outer side in the left-right direction with respect to the main body 18 of the first mounting member 12, the main body of the first mounting member 12. 18 can be reduced in size.

  Further, the first and second stopper pieces 76 and 78 are configured such that the middle portion in the vertical direction is in contact with the main body portion 18 of the first mounting member 12. It extends to the lower side than the contact part. Thus, even when the relative positions of the first mounting member 12 and the gate bracket 54 in the vertical direction change due to the deformation of the main rubber elastic body 16, the first and second stopper pieces 76 and 78 and the main body portion. The contact area of 18 is ensured, and the intended displacement regulation effect is effectively exhibited, and deterioration of the characteristics at the time of contact (vibration, hammering sound, etc.) is prevented.

  In addition, since the first stopper piece 76 is provided with the base end support portion 22 of the connecting portion 20 of the first mounting member 12 disengaged to the front side, the first stopper piece 76 is provided from the right side opening 72 of the portal bracket 54. While adopting the first mounting member 12 having a projecting structure, it is possible to provide the first stopper piece 76 extending downward from the contact portion. In particular, in the present embodiment, the base end support portion 22 of the connecting portion 20 is provided so as to extend from the rear end portion of the main body portion 18, so that the first mounting member 12 does not need to be enlarged, and the first A sufficient overlap in the front-rear direction between the stopper piece 76 and the main body 18 can be ensured.

  The first stopper piece 76 is supported by the leg portion 56a and the front end portion of the top plate portion 58, and the second stopper piece 78 is supported by the leg portion 56b and the rear end portion of the top plate portion 58. Yes. Thereby, the relative rotation of the first mounting member 12 with respect to the second mounting member 14 accompanying the displacement of the power unit is prevented, and deformation of the main rubber elastic body 16 in the twisting direction is prevented. Improvement is achieved. In addition, if the engine mount 10 having the structure according to the present embodiment is adopted as an engine mount for an automobile, the displacement of the power unit is limited, so that the running stability of the automobile can be improved.

  The first and second stopper pieces 76 and 78 are provided at the corners of the portal bracket 54, and the first stopper piece 76 is supported by both the leg portion 56a and the top plate portion 58. In addition, the second stopper piece 78 is supported by both the leg portion 56 b and the top plate portion 58. Thus, the first and second stopper pieces 76 and 78 are supported with sufficient strength by the leg portions 56a and 56b and the top plate portion 58, and the first and second stoppers due to contact with the main body portion 18 are supported. The deformation (damage) of the pieces 76 and 78 is prevented. Furthermore, since the first and second stopper pieces 76 and 78 are provided like ribs at the boundary between the pair of leg portions 56a and 56b and the top plate portion 58, the strength of the portal bracket 54 is improved. Thus, the portal bracket 54 can be reduced in weight and size.

  Further, since the mount body 11 is fitted into the portal bracket 54 from below, the first and second stopper pieces 76 and 78 are provided so as to cover the side openings 72 and 74. Even in this case, the assembly work of the mount body 11 and the gate bracket 54 does not cause a problem, and the engine mount 10 can be easily manufactured.

  In addition, since the first and second stopper pieces 76 and 78 are both integrally formed with the leg portions 56a and 56b and the top plate portion 58 of the portal bracket 54, the number of parts can be increased without increasing the number of parts. The engine mount 10 provided with the displacement regulating means can be obtained.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the first and second stopper pieces are not necessarily limited to the structure supported by both the leg portion 56 and the top plate portion 58, and extend from either the leg portion 56 or the top plate portion 58. It is also possible to adopt a structure that takes out. Further, the second stopper piece may be formed such that the front end portion is supported by the leg portion 56 a and the rear end portion is supported by the leg portion 56 b, and the upper end portion is further supported by the top plate portion 58. It may be supported.

  Further, the connecting portion 20 of the first mounting member 12 may extend laterally from an intermediate portion in the front-rear direction of the main body portion 18. In this case, a structure may be employed in which first stopper pieces are provided on both front and rear sides of the connecting portion 20 so as to overlap with the main body portion 18 in side projection. As is clear from this, there are cases where two or more of the first and second stopper pieces are provided.

  The first and second stopper pieces are preferably formed integrally with the leg portion 56 and the top plate portion 58 in order to reduce the number of parts, but are separate from the leg portion 56 and the top plate portion 58. It may be formed of a body and fixed to the leg portion 56 or the top plate portion 58 by means such as welding.

  The mount body may be a solid-type vibration isolator as shown in the embodiment, or a plurality of fluid chambers filled with an incompressible fluid, and an orifice passage communicating these fluid chambers. And a fluid-filled vibration isolator that utilizes the vibration isolating effect based on the fluid flow action.

  The scope of application of the present invention is not limited to automobile engine mounts, and the present invention can also be applied to engine mounts for motorcycles, railway vehicles, industrial vehicles, and the like.

10: engine mount, 12: first mounting member, 14: second mounting member, 16: main rubber elastic body, 18: main body portion, 20: connecting portion, 54: portal bracket, 56: leg portion, 58 : Top plate part, 72: right side opening part (one side opening part), 74: left side opening part (the other side opening part), 76: first stopper piece, 78: second stopper piece

Claims (3)

The first attachment member and the second attachment member are connected by a main rubber elastic body, and the first attachment member extends to the side from the main body portion attached to the main rubber elastic body. And a gate-shaped bracket having a pair of legs fixed to the second mounting member and a top plate for connecting the legs to the second mounting member. The top plate portion of the portal bracket is disposed across the first mounting member, and the connecting portion of the first mounting member is one of the portal brackets. In the engine mount that extends from the side opening and can be attached to the power unit,
The portal bracket is provided with a first stopper piece that partially covers one side opening of the portal bracket so as to disengage the connecting portion of the first mounting member. A second stopper piece is provided to partially cover the other side opening of the shaped bracket, and the first stopper piece and the second stopper piece are projected in the lateral direction of the portal bracket. The first mounting member is overlapped with the main body portion, and the first mounting member and the second stopper member are laterally contacted with the second mounting member by contacting the main body portion with the first stopper piece and the second stopper piece. Lateral displacement restricting means for restricting relative displacement to the main body is provided, and the first stopper piece and the second stopper piece are below the contact portion of the first mounting member with respect to the main body. It is characterized by extending to Engine mount.   In the opposing direction of the pair of legs, the first stopper piece is provided to face one end of the main body, and the second stopper piece is the other end of the main body. The engine mount according to claim 1, wherein the engine mount is provided opposite to the engine mount.   The first stopper piece extends from one of the pair of legs and the top plate, and the second stopper piece extends from the other of the pair of legs and the top plate. The engine mount according to claim 1 or 2, wherein the engine mount extends.

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