JP2011247333A - Antivibration support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antivibration support structure having a novel structure, capable of restricting relative displacement of a vibrating body with respect to an antivibration object member at both sides in the opening direction of a gate-shaped member, while preventing increase in weight and the number of parts.SOLUTION: A first attaching member 20 in an antivibration device 12 is provided with a coupling part 28 to be fixed to either of a vibrating body 14 and an antivibration object member 16. The coupling part 28 is outwardly extended in the opening direction of the gate-shaped member 100, and a lateral stopper mechanism is configured which restricts relative displacement to one side in the opening direction of the gate-shaped member 100 in the first attaching member 20 and the second attaching member 22 by abutment of the coupling part 28 to the gate-shaped member 100, and meanwhile, a lateral side displacement restriction mechanism for the vibrating body is configured, which cooperates with each lateral stopper mechanism of each of the antivibration devices 12, 12 with the pair of antivibration devices 12, 12 disposed on both sides of the vibrating body 14, and restricts the relative displacement of the vibrating body 14 with respect to the antivibration object member 16, on both sides.

Description

  The present invention relates to a vibration-proof support structure that can be suitably applied to, for example, a power unit support structure using an engine mount.

  Conventionally, for example, as a structure for connecting a power unit of an automobile to a vehicle body, an anti-vibration support structure in which an anti-vibration device is interposed between the power unit and the vehicle body is known. The anti-vibration device used in this anti-vibration support structure has a structure in which a first attachment member and a second attachment member are connected in an anti-vibration manner by a main rubber elastic body. For example, Japanese Patent Application Laid-Open No. 11-294534 This is shown in the publication (Patent Document 1).

  By the way, in patent document 1, while the connection part (inner bracket) is provided in the 1st attachment member side, the portal member is attached to the 2nd attachment member, and these connection parts and portal member are A stopper mechanism that restricts relative displacement between the first mounting member and the second mounting member is configured using the facing portion.

  However, in Patent Document 1, since one of the members constituting the stopper has a gate shape, an effective stopper mechanism is not configured in the opening direction of the portal member. Therefore, the relative displacement of the first and second mounting members is not regulated, and there is a possibility that a decrease in durability may be a problem such as damage to the main rubber elastic body due to excessive deformation.

JP 11-294534 A

  The present invention has been made in the background of the above-described circumstances, and the problem to be solved is to prevent an increase in the weight and the number of parts, and relative to the vibration isolation target member of the vibrating body on both sides in the opening direction of the portal member. An object of the present invention is to provide a vibration-proof support structure having a novel structure capable of limiting the amount of displacement.

  That is, according to the first aspect of the present invention, the first attachment member and the second attachment member attached to one of the vibration body and the vibration isolation target member are connected by the main rubber elastic body, and the second A gate-shaped member disposed across the first mounting member is attached to the mounting member, and a rebound stopper mechanism is configured by the opposing portion of the first mounting member and the gate-shaped member. In the vibration isolation support structure of the vibration body in which the vibration body is supported on the vibration isolation target member via the vibration isolation device using the vibration isolation device, the first attachment member of the vibration isolation device Is provided with a connecting portion fixed to one of the vibrating body and the vibration-proof target member, and the connecting portion extends outward in the opening direction of the gate-shaped member. The first mounting member and the second member by contact of the portion with the portal member A side stopper mechanism for limiting the relative displacement amount of the portal member in the opening direction to one side of the mounting member is configured, while a pair of vibration isolating devices are arranged on both sides of the vibrating body. A lateral displacement amount limiting mechanism for the vibrating body is configured to limit the relative displacement amount of the vibrating body with respect to the vibration isolation target member on both sides in cooperation with the side stopper mechanisms of the vibration isolation device. It is characterized by that.

  According to the anti-vibration support structure having the structure according to the first aspect of the present invention, the side stopper mechanism is constituted by the first mounting member and the gate-shaped member without adding special parts. In addition, since the side stopper mechanism is configured to limit the relative displacement amount of the vibrating body with respect to the vibration isolation target member on one side in the opening direction of the portal member, in the first mounting member and the portal member, It is possible to adopt a simple structure in which they abut only on one side. As a result, an increase in the number of parts and weight can be prevented, and it can be prevented that the structure becomes extremely complicated and difficult to manufacture.

  Further, vibration isolators each having a side stopper mechanism are disposed on both sides of the vibrating member in the opening direction of the portal member. Thereby, the displacement amount of the vibrating body is limited on both sides in the opening direction of the portal member by the side stopper mechanism of each vibration isolator, and the vibrating body is adopted while adopting the side stopper mechanism with a simple structure. The amount of displacement can be effectively limited.

  According to a second aspect of the present invention, in the anti-vibration support structure described in the first aspect, the gate shape is formed on the connecting portion of the first mounting member at a plurality of positions separated in the width direction of the portal shape member. The side stopper mechanism is configured by providing a stopper portion that contacts the member.

  According to the second aspect, the first mounting member and the gate shape are provided by providing the connecting portion with a plurality of abutting portions that are separated in the width direction of the gate-shaped member (opposite direction of the columnar portions at both ends). The moment exerted on the main rubber elastic body when the member abuts can be reduced. Therefore, deformation of the main rubber elastic body in the torsion direction is prevented, the durability of the main rubber elastic body is improved, and the vibration body connected to the first mounting member is displaced in the torsion direction. Can be prevented.

  According to a third aspect of the present invention, in the anti-vibration support structure described in the first or second aspect, the connecting portion is covered with a bag-like stopper rubber and attached non-adheringly. Rubber is disposed at a contact portion with the gate-shaped member constituting the rebound stopper mechanism, and a tongue piece integrally formed with the stopper rubber contacts the gate-shaped member constituting the side stopper mechanism. It is arranged at the contact portion.

  According to the third aspect, the shock absorbing rubber that alleviates the contact impact of each stopper mechanism is formed integrally with the stopper rubber and is attached at a time. Therefore, an increase in the number of parts can be prevented, and attachment work can be facilitated.

  According to a fourth aspect of the present invention, in the vibration isolating support structure described in any one of the first to third aspects, in the vibration isolator, the first mounting member and the second mounting member are While the main rubber elastic body is non-adhered, the first attachment member has a fitting recess that opens toward the second attachment member, and the second attachment member The mounting member has a concave portion that opens toward the first mounting member, and one end of the main rubber elastic body is fitted into the fitting recess, and the main rubber elastic body The other end of is inserted into the concave portion.

  According to the 4th aspect, the 1st, 2nd attachment member and main body rubber elastic body are made into non-adhesion, Therefore The vibration isolator of another structure which made components common can be obtained easily. Moreover, the first and second mounting members are each provided with a concave portion, and the end of the main rubber elastic body is fitted into the concave portion, thereby preventing the main rubber elastic body from coming off. This ensures load bearing performance. In addition, the relative amount of displacement between the first mounting member and the second mounting member is limited by the rebound stopper mechanism and the side stopper mechanism, so that the first and second mounting members and the rubber elastic body of the main body have an external force. Separation can be prevented by the action of.

  According to a fifth aspect of the present invention, in the vibration-proof support structure described in the fourth aspect, an opening-side end portion of each of the fitting recess and each peripheral wall of the concave portion is an outer peripheral surface of the main rubber elastic body. Are separated from each other.

  According to the fifth aspect, the durability can be improved by preventing the outer peripheral surface of the main rubber elastic body from being cracked. In addition, the relative displacement between the first mounting member and the second mounting member is limited by the side stopper mechanism, so that the opening side end of the peripheral wall of the mounting recess and the concave portion is the main body rubber even when an external force is applied. Contact with the outer peripheral surface of the elastic body can be prevented, and a decrease in durability is prevented.

  According to the present invention, the vibration isolator capable of restricting the displacement amount of the vibrating body in the opening direction of the gate-shaped member on each side is disposed on both sides of the vibrating body. The displacement amount is limited on both sides in the opening direction of the portal member. Therefore, as the side stopper mechanism provided in each vibration isolator, a simple structure with a small number of parts can be adopted, and the weight of the vibration isolator and the anti-vibration support structure using the same can be reduced. Cost reduction and the like can be realized.

FIG. 3 is a layout view illustrating a vibration-proof support structure as one embodiment of the present invention. The longitudinal cross-sectional view which shows the vehicle mounting state of the engine mount shown by FIG. III-III sectional drawing of FIG. The front view which shows the engine mount shown by FIG. 2 alone. The side view of the engine mount shown by FIG. The top view of the engine mount shown by FIG. Sectional drawing of the 1st attachment member which comprises the engine mount shown by FIG. The top view of the 1st attachment member shown by FIG. Sectional drawing of the 2nd attachment member which comprises the engine mount shown by FIG. The top view of the 2nd attachment member shown by FIG. Sectional drawing of the main body rubber elastic body which comprises the engine mount shown by FIG. The top view of the main body rubber elastic body shown by FIG. The bottom view of the main body rubber elastic body shown by FIG. The top view of the stopper rubber which comprises the engine mount shown by FIG. The bottom view of the stopper rubber | gum shown by FIG. The side view of the stopper rubber | gum shown by FIG. XVII-XVII sectional drawing of FIG. Sectional drawing of the portal member which comprises the engine mount shown by FIG. The perspective view which expands and shows the principal part of the side stopper mechanism of the engine mount shown by FIG. The side view which expands and shows the principal part of the side stopper mechanism shown by FIG.

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

  FIG. 1 shows a schematic plan view of a vibration isolator support structure 10 according to the present invention. The anti-vibration support structure 10 has a structure in which a power unit 14 as a vibration body is supported in an anti-vibration manner on a vehicle body 16 as an anti-vibration target member by a pair of engine mounts 12 shown in FIGS. ing.

  More specifically, the engine mount 12 includes a mount body 18, and the mount body 18 has a structure in which a first mounting member 20 and a second mounting member 22 are connected by a main rubber elastic body 24. ing. 2 and 3 show the mounting state of the engine mount 12 on the vehicle, and FIGS. 4 to 6 show the mounting state of the engine mount 12 on the vehicle. Moreover, in the following description, the vertical direction means the vertical direction in FIG. 2 which is the mount central axis direction in principle.

  As shown in FIGS. 7 and 8, the first attachment member 20 includes a main body portion 26 that is an attachment portion to the main rubber elastic body 24 and a connection portion 28 that is an attachment portion to the power unit 14. , Have a structure provided integrally. The first mounting member 20 is a high-rigidity member formed entirely of a metal material such as iron or aluminum alloy.

  The main body 26 has a concave shape that opens downward as a whole, and includes a central protrusion 30. The central protrusion 30 is formed in a substantially conical shape with a reverse diameter that gradually becomes smaller in the downward direction, and has a curved surface that is rounded at its lower end surface and has no corners. Further, an upper communication hole 32 penetrating in the axial direction is formed in the central portion of the central protrusion 30. The upper communication hole 32 is a circular hole penetrating the central protrusion 30 up and down. The upper communication hole 32 has a tapered shape in which the upper part expands upward, and the lower part extends up and down with a substantially constant diameter. .

  A plate-like portion 34 is integrally formed at the upper end of the central protrusion 30. The plate-like portion 34 has a substantially flat plate shape extending in the direction perpendicular to the axis, and the central protrusion 30 protrudes downward from the central portion thereof. Further, a guide groove 36 is formed in the plate-like portion 34. The guide groove 36 is a concave groove opened on the upper surface of the plate-like portion 34, and extends linearly in the width direction (vertical direction in FIG. 8) with a substantially constant cross-sectional shape. The guide groove 36 extends so as to cross the upper opening of the upper communication hole 32, and both ends in the length direction are open to the outer peripheral surface of the plate-like portion 34, and the center in the length direction is the upper side. It is connected to the communication hole 32.

  Further, an outer peripheral wall portion 38 is integrally formed on the outer peripheral edge portion of the plate-like portion 34. The outer peripheral wall portion 38 is continuously formed over the entire circumference along the outer periphery of the plate-like portion 34, and is located on the same side as the central projecting portion 30 at a position separated from the central projecting portion 30 on the outer peripheral side. Protrusively. Thereby, between the outer peripheral surface of the central protrusion 30 and the inner peripheral surface of the outer peripheral wall 38, an annular fitting recess 40 that opens downward is formed.

  Further, the protruding height of the outer peripheral wall portion 38 from the plate-like portion 34 is smaller than the protruding height of the central protruding portion 30 from the plate-like portion 34, and the proximal end of the central protruding portion 30 is the outer peripheral wall portion 38. And the protruding tip of the central protrusion 30 protrudes downward from the outer peripheral wall 38.

  In addition, a connecting portion 28 is integrally provided on a part of the circumference of the outer peripheral wall portion 38 and extends toward the side (right side in FIG. 2). The connecting portion 28 has an irregular plate shape as a whole, and three bolt holes 42, 42, 42 are formed through the front end portion protruding from the outer peripheral wall portion 38 in the plate thickness direction. Yes.

  In addition, a pair of contact steps 44 and 44 as stopper portions are formed at the intermediate portion in the extending direction of the connecting portion 28. The contact step 44 is provided on the upper surface of the connecting portion 28, and the distal end side in the extending direction of the connecting portion 28 across the contact step 44 protrudes upward from the base end side. Further, a pair of contact steps 44, 44 are provided at a predetermined distance in the width direction of the connecting portion 28 (vertical direction in FIG. 8).

  On the other hand, as shown in FIGS. 9 and 10, the second mounting member 22 includes a concave portion 46 at the center portion. The concave portion 46 has a substantially circular dish shape that opens upward, and gradually increases in diameter from the outer peripheral edge portion of the bottom wall portion 48 and the bottom wall portion 48 to the upper side. And a peripheral wall portion 50 that extends. In addition, a pair of attachment portions 52, 52 extending outward in one radial direction are integrally formed on the opening peripheral edge of the concave portion 46, and each of the attachment portions 52 having a plate shape is circular or long. A circular bolt hole 54 is formed. The second mounting member 22 can be obtained by, for example, pressing a metal plate punched into a predetermined shape.

  Further, a lower communication hole 56 is formed in the concave portion 46 of the second mounting member 22. The lower communication hole 56 is a circular hole provided at the center in the radial direction of the second mounting member 22 and penetrates the bottom wall portion 48 of the concave portion 46 in the vertical direction. The lower communication hole 56 has a larger diameter than the lower part of the upper communication hole 32 (a part having a constant diameter).

  In the first mounting member 20 and the second mounting member 22 having such a structure, the fitting recess 40 and the concave portion 46 are opposed in the axial direction (up and down in FIG. 2) which is the main vibration input direction. Are arranged to be. The main rubber elastic body 24 is interposed between the opposing surfaces of the central protrusion 30 and the plate-like portion 34 of the first attachment member 20 and the bottom wall portion 48 of the second attachment member 22.

  As shown in FIGS. 11 to 13, the main rubber elastic body 24 has a substantially truncated cone shape with a large thickness and a large diameter as a whole, and the upper portion gradually becomes smaller in diameter upward. The lower part gradually decreases in diameter toward the bottom. The small-diameter side end (upper end) of the main rubber elastic body 24 is fitted in the fitting recess 40 of the first mounting member 20 without bonding, and the large-diameter end (lower end) is The second mounting member 22 is fitted into the concave portion 46 in a non-adhesive manner. As a result, the first mounting member 20 and the second mounting member 22 are attached to the main rubber elastic body 24 without being bonded from both sides in the axial direction, and are elastically connected by the main rubber elastic body 24. Thus, the mount body 18 is formed. A mounting recess 58 having a shape corresponding to the central protrusion 30 of the first mounting member 20 is opened on the small diameter side end face of the main rubber elastic body 24, and the central protrusion 30 is formed in the mounting recess 58. It has been inserted. Further, in a non-mounted state in the vehicle, the first mounting member 20 and the second mounting member 22 are separated from each other in the axial direction when projected in the direction perpendicular to the axis.

  Further, a central recess 60 is opened in the large-diameter side end face of the main rubber elastic body 24. The central recess 60 is a recess having a substantially mortar shape in the reverse direction, and is open downward. Further, the central recess 60 is formed on the central axis of the main rubber elastic body 24 and has an opening whose diameter does not reach the outer peripheral edge of the lower end of the main rubber elastic body 24.

  Furthermore, an intermediate communication hole 62 is formed at the center in the radial direction of the main rubber elastic body 24. The intermediate communication hole 62 is a circular hole having a substantially constant diameter and extending in the axial direction, and is formed so as to penetrate the upper bottom wall portion of the central recess 60 in the vertical direction. The intermediate communication hole 62 has a larger diameter than the lower portion of the upper communication hole 32 and a smaller diameter than the lower communication hole 56. The upper communication hole 32, the intermediate communication hole 62, and the lower communication hole 56 are provided in series on the same central axis, and the communication hole 64 penetrating the mount main body 18 in the axial direction is provided as the upper communication hole. 32, an intermediate communication hole 62, and a lower communication hole 56. By this communication hole 64, the water that has entered between the first and second mounting members 20, 22 and the rubbers 24, 78 is quickly discharged to the outside.

  An upper protrusion 66 is provided at the upper end of the main rubber elastic body 24. The upper protrusion 66 protrudes upward from the upper end surface of the main rubber elastic body 24 and extends in the radial direction, and a plurality of upper protrusions 66 are provided at a predetermined distance in the circumferential direction. Further, the upper protrusion 66 extends to the outer peripheral surface of the upper end portion of the main rubber elastic body 24 and protrudes radially outward. Also, by providing a plurality of upper protrusions 66 on the circumference, upper concave grooves 68 extending in the radial direction and the axial direction are formed between the upper protrusions 66 adjacent in the circumferential direction.

  As shown in FIG. 2, the formation portion of the upper protrusion 66 in the main rubber elastic body 24 is fitted in the fitting recess 40 of the first mounting member 20 in a non-adhesive manner. A tunnel-shaped passage is formed by an upper concave groove 68 between the plate-like portion 34 and the outer peripheral wall portion 38 of the member 20 and the main rubber elastic body 24. Further, the length of the portion of the upper protrusion 66 that extends vertically on the outer peripheral surface of the main rubber elastic body 24 is shorter than the protruding height of the outer peripheral wall portion 38 of the first mounting member 20. As a result, the outer peripheral surface of the main rubber elastic body 24 below the upper protrusion 66 is separated from the outer peripheral wall portion 38 of the first mounting member 20 toward the inner peripheral side. By allowing the deformation to the side, the first mounting member 20 is prevented from coming off. Further, since the outer peripheral surface of the main rubber elastic body 24 is separated from the inner peripheral side of the lower end inner peripheral edge of the outer peripheral wall portion 38, a decrease in durability of the main rubber elastic body 24 due to contact is prevented. ing.

  Further, an outer peripheral projection 70 is provided on the outer peripheral surface of the lower end portion of the main rubber elastic body 24. As shown in FIG. 11, the outer peripheral protrusion 70 is formed so as to protrude outward in the radial direction at the large-diameter side end of the main rubber elastic body 24, and extends up and down by a predetermined length. ing. In addition, since the plurality of outer peripheral protrusions 70 are provided at a predetermined distance in the circumferential direction, an outer peripheral concave groove 72 extending vertically is formed between the outer peripheral protrusions 70 adjacent in the circumferential direction.

  Furthermore, a lower protrusion 74 is provided on the lower end surface of the main rubber elastic body 24. The lower protrusion 74 protrudes downward from a portion of the main rubber elastic body 24 that is outside the central recess 60 on the outer peripheral side, and extends in a circumferential direction by a predetermined length as shown in FIG. ing. Further, since the plurality of lower protrusions 74 are provided at a predetermined distance in the circumferential direction, a lower concave groove 76 extending in the radial direction is formed between the lower protrusions 74 adjacent in the circumferential direction. .

  And the formation part of the outer periphery protrusion 70 and the lower protrusion 74 in the main body rubber elastic body 24 is engage | inserted by the non-adhesion in the recessed part 46 of the 2nd attachment member 22. FIG. Thereby, between the overlapping surfaces of the second mounting member 22 and the main rubber elastic body 24, a communication groove that communicates the central recess 60 and the external space uses the outer peripheral recess groove 72 and the lower recess groove 76. Is formed. Further, since the central recess 60 is formed, the portion of the main rubber elastic body 24 fitted into the second mounting member 22 is allowed to deform toward the inner peripheral side, and the main rubber elastic body 24 Removal from the second mounting member 22 is prevented. In addition, the end of the main rubber elastic body 24 fitted into the second mounting member 22 is allowed to deform toward the inner peripheral side by being provided with the central recess 60, so that the main rubber elastic body The substantial free length of 24 is ensured greatly, and the vibration-proof performance and durability can be improved. The upper end portion of the peripheral wall portion 50 of the concave portion 46 is separated from the portion located above the formation portion of the outer peripheral protrusion 70 on the outer peripheral surface of the main rubber elastic body 24 by a predetermined distance. A decrease in durability due to contact with the upper end portion is prevented.

  Thus, the main rubber elastic body 24 is fitted into the first mounting member 20 having a concave shape whose upper end portion opens downward, and has a concave shape whose lower end portion opens upward. The second mounting member 22 is fitted. Therefore, excellent load-bearing performance in both the axial direction and the axis-perpendicular direction while adopting a non-adhesive structure in which the first and second mounting members 20, 22 and the main rubber elastic body 24 are assembled non-adhered. Is realized.

As shown in FIG. 11, in the main rubber elastic body 24, in the single state, the depth dimension of the central recess 60: a ₁ is the axial direction of the fitting portion to the second mounting member 22. Dimension: smaller than a ₂ (a ₁ <a ₂ ). Further, the diameter of the opening of the central recess 60: a ₃ is equal to or larger than the diameter of the opening of the mounting recess 58: a ₄ (a ₃ ≧ a ₄ ). As a result, the concentration of stress is reduced and the main rubber elastic body 24 is prevented from coming off from the first and second mounting members 20 and 22.

Further, as shown in FIG. 3, in the state where the main rubber elastic body 24 is mounted on the vehicle, the axial dimension: a _{5 of the} portion overlapping the first mounting member 20 in the projection in the direction perpendicular to the axis is The axial dimension of the portion overlapping the second mounting member 22 in the projection perpendicular to the axis is larger than a ₆ (a ₅ > a ₆ ). Furthermore, the width dimension in the radial direction of the portion is superimposed on the second mounting member 22: a ₇ is, the width in the radial direction of the portion superposed to the plate-like portion 34 of the first mounting member 20: a _It is larger than ₈ (a ₇ > a ₈ ).

  A stopper rubber 78 is attached to the first mounting member 20. As shown in FIGS. 14 to 17, the stopper rubber 78 has a box shape or a bag shape lacking one of the bottom wall and the side wall, and has an upper bottom wall portion 80 and three side wall portions 82a. , 82b, 82c. In addition, the pair of side wall portions 82b and 82c opposed in the width direction have end surfaces on the open side (left side in FIG. 16) gradually inclined downward toward the open side, and the pair of side wall portions 82b and 82c, Each 82c has a substantially trapezoidal plate shape. In the present embodiment, the thicknesses of the opposing pair of side wall portions 82b and 82c are different.

  A contact portion 84 is provided at the bottom of the stopper rubber 78. The contact portion 84 is integrally formed below the inclined side end portions (left end portion in FIG. 16) of the pair of opposing side wall portions 82b and 82c, and straddles the pair of side wall portions 82b and 82c. Is provided.

  In addition, a buffer protrusion 86 is integrally formed on each of the pair of side wall portions 82b and 82c of the stopper rubber 78, and protrudes outward in the opposing direction of the pair of side wall portions 82b and 82c. The buffer protrusion 86 extends in a vertical direction with a predetermined length, and is a ridge that gradually becomes narrower toward the protruding tip side. In the present embodiment, two buffer protrusions 86 and 86 are provided in parallel with a predetermined distance from the side wall portions 82b and 82c, respectively.

  Further, on the open side of the stopper rubber 78, a buffer protrusion 88 as a tongue piece is integrally formed with the upper bottom wall portion 80 and extends. The buffer projecting piece 88 has a base end portion that is curved in the thickness direction toward the projecting distal end side and is gradually inclined upward, and the projecting distal end portion extends upward. It is made into the plate shape substantially corresponding to the contact level | step difference 44 provided in the connection part 28 of the attachment member 20 of this. Further, a pair of buffer protrusions 88 are provided corresponding to the contact step 44, and the pair of buffer protrusions 88, 88 are separated from each other in the width direction.

  A plurality of first buffer ridges 90 are integrally formed on the upper bottom wall portion 80 of the stopper rubber 78 and provided in parallel. The first buffer ridge 90 protrudes upward, the distal end portion in the protruding direction has a narrower width than the base end portion, and the surface is substantially constant with a curved surface over the entire surface. And has a predetermined length.

  In addition, second buffer ridges 92 are respectively formed on the outer sides in the width direction than the plurality of first buffer ridges 90. The second buffer ridge 92 has a substantially semicircular cross section and is provided in parallel with the first buffer ridge 90, and is located above the upper bottom wall 80 with a projection height smaller than that of the first buffer ridge 90. Protrudes toward.

  Further, visual recognition protrusions 94 are formed on the outer sides in the width direction than the second buffer protrusions 92. The visual recognition protrusion 94 has a substantially circular cross section and protrudes upward from the upper bottom wall portion 80, and protrudes larger than the first buffer ridge 90 in this embodiment. In addition, the protrusion front-end | tip part of the visual recognition protrusion 94 is made into a substantially hemispherical shape, and becomes a small diameter gradually toward the protrusion front end side.

  A locking projection 96 is formed on the upper bottom wall 80 of the stopper rubber 78. The locking protrusion 96 protrudes downward from the upper bottom wall portion 80 and extends linearly over the entire length in the width direction. Further, as shown in FIG. 2, the side surface of the locking projection 96 positioned on the open side (right side in FIG. 2) of the stopper rubber 78 is inclined and spreads with respect to the protruding direction. The protrusion 96 becomes gradually narrower toward the protruding tip side.

  The stopper rubber 78 is put on the first mounting member 20. That is, the upper bottom wall portion 80 and the side wall portions 82a, 82b, and 82c are overlapped with the main body portion 26 of the first mounting member 20, and the abutting portion 84 is the lower surface of the connecting portion 28 of the first mounting member 20. Is superimposed. Accordingly, the stopper rubber 78 is attached to the first mounting member 20 without being bonded.

  Furthermore, the opening of the guide groove 36 provided in the first mounting member 20 is covered with a stopper rubber 78, and a locking projection 96 provided in the stopper rubber 78 is fitted in the guide groove 36. Then, a positioning mechanism for positioning the stopper rubber 78 and the first mounting member 20 in the projecting direction of the connecting portion 28 (the left-right direction in FIG. 2), with the locking projection 96 and the side surface of the guide groove 36 abuttingly locked. As a result, the stopper rubber 78 is prevented from coming off from the first mounting member 20. Further, on the open side of the stopper rubber 78 (right side in FIG. 2), a gap 98 is formed between the side surface of the locking projection 96 and the side surface of the guide groove 36, and the side wall 82 a side of the stopper rubber 78. 2 (the left side in FIG. 2), the side surface of the locking projection 96 and the side surface of the guide groove 36 are overlapped with each other and are in contact with each other.

  When the stopper rubber 78 is mounted on the first mounting member 20 as described above, the contact portion 84 of the stopper rubber 78 is opposed to the connecting portion 28 of the first mounting member 20 and the second mounting member 22. It is arranged between the faces. Thereby, while the bound stopper mechanism which controls the relative approach displacement of the 1st attachment member 20 and the 2nd attachment member 22 is constituted by the opposing part of connecting part 28 and 2nd attachment member 22, A shock absorbing rubber that alleviates the contact impact of the first and second mounting members 20 and 22 is constituted by the contact portion 84 of the stopper rubber 78.

  Further, the portal member 100 is attached to the second attachment member 22. As shown in FIG. 18, the portal member 100 is formed by bending a long plate-shaped metal material, and bolt holes 102 are provided at both ends in the length direction. Moreover, the contact rib 104 is formed by bending the width direction both ends of the gate-shaped member 100 toward the outside, and the bending strength in the plate | board thickness direction of the portal-shaped member 100 is ensured.

  As shown in FIG. 3, the gate-shaped member 100 is disposed so as to straddle the upper portion of the main body portion 26 of the first mounting member 20 and the upper bottom wall portion 80 of the stopper rubber 78. Both ends in the vertical direction are bolted to the mounting portion 52 of the second mounting member 22. Further, the connecting portion 28 of the first mounting member 20 extends outward in the opening direction of the portal member 100 (the left-right direction in FIG. 2). A pair of visual recognition holes 106 and 106 that are separated in the length direction are formed through the portion of the portal member 100 that straddles the stopper rubber 78. By aligning, the relative position of the stopper rubber 78 and the portal member 100 can be set correctly.

  Thereby, the displacement to the separation direction (rebound direction) of the 1st attachment member 20 and the 2nd attachment member 22 using the opposing surface of the main-body part 26 of the 1st attachment member 20, and the portal-shaped member 100 is carried out. A rebound stopper mechanism that regulates the above is configured. An upper bottom wall 80 of the stopper rubber 78 is interposed between the first mounting member 20 and the portal member 100 constituting the rebound stopper mechanism. A shock absorbing rubber that reduces the contact impact between the one mounting member 20 and the portal member 100 is configured.

  Moreover, the vehicle front-back direction (FIG. 3) of the 1st attachment member 20 and the 2nd attachment member 22 is utilized using the opposing surface of the main-body part 26 of the 1st attachment member 20, and the both-ends column part of the portal-shaped member 100. A front stopper mechanism and a rear stopper mechanism for restricting the amount of relative displacement in the middle and right and left directions are configured. Further, the side walls 82b and 82c of the stopper rubber 78 are interposed between the first mounting member 20 and the portal member 100 constituting the front and rear stopper mechanisms, and the side walls 82b and 82c of the stopper rubber 78 are interposed by the side walls 82b and 82c. A shock absorbing rubber that reduces the contact impact between the first mounting member 20 and the portal member 100 is configured. The contact impact is more effectively mitigated by the buffer protrusions 86 provided on the side walls 82b and 82c.

  Further, as shown in FIGS. 19 and 20, the first mounting member 20 and the second mounting are used by utilizing the facing surfaces of the connecting portion 28 of the first mounting member 20 and the portal member 100. A side stopper mechanism that restricts relative displacement of the member 22 to one side in the vehicle left-right direction (left-right direction in FIG. 2) is configured. That is, the contact step 44 provided on the connecting portion 28 faces the side surface of the contact rib 104 of the portal member 100 in the opening direction of the portal member 100 (left and right in FIG. 2). A side stopper mechanism that restricts the relative displacement of the first mounting member 20 and the second mounting member 22 in the left-right direction of the vehicle is configured by the contact between the contact step 44 and the contact rib 104. In the present embodiment, the connecting portion 28 is provided with a pair of contact steps 44, 44 at two locations separated in the width direction (left and right in FIG. 3) substantially orthogonal to the opening direction of the portal member 100. The connecting portion 28 and the contact rib 104 come into contact with each other. In addition, as shown in FIGS. 19 and 20, a buffer protrusion 88 of a stopper rubber 78 is superimposed on the contact step 44 constituting the side stopper mechanism. A buffer rubber that reduces the abutting impact of the rib 104 is configured by a buffer protrusion 88.

  The engine mount 12 having such a structure is attached to the vehicle by attaching the first attachment member 20 to the power unit 14 and attaching the second attachment member 22 and the portal member 100 to the vehicle body 16. It has come to be. In the engine mount 12, a support load of the power unit 14 is exerted between the first mounting member 20 and the second mounting member 22 in a mounted state on the vehicle. As a result, the main rubber elastic body 24 is compressed in the axial direction so that the first mounting member 20 and the second mounting member 22 approach and are displaced, and the first mounting member 20 is pivoted relative to the portal member 100. Separate downward in the direction. As a result, the first mounting member 20 and the second mounting member 22 overlap each other over the entire circumference in the projection in the direction perpendicular to the axis, and the first mounting member 20 and the second mounting member are overlapped with each other. A main rubber elastic body 24 is interposed between the opposing surfaces of the 22 in the direction perpendicular to the axis.

  Further, as shown in FIG. 1, the engine mount 12 is attached to both sides in the left-right direction of the vehicle with the power unit 14 interposed therebetween, so that the power unit 14 is supported in a vibration-proof manner with respect to the vehicle body 16. Therefore, the anti-vibration support structure 10 in the present embodiment is configured. The pair of engine mounts 12 and 12 are attached to the power unit 14 and the vehicle body 16 at positions shifted from each other in the vehicle longitudinal direction, and the opening direction of the portal member 100 of each engine mount 12 is the vehicle. They are arranged facing each other so as to be substantially parallel to the left-right direction.

  In the anti-vibration support structure 10, as shown in FIG. 1, the engine mount 12 provided with a side stopper mechanism that restricts the amount of displacement of the power unit 14 to one side in the vehicle left-right direction is provided on the left and right sides of the vehicle. It is arrange | positioned at the both sides which pinched | interposed the power unit 14 by the direction. As a result, the displacement of the power unit 14 in the left-right direction of the vehicle is limited one by one by each engine mount 12, and the anti-vibration support structure 10 is supported by the cooperation of the side stopper mechanism of each engine mount 12. As a whole, a vibration body side displacement amount limiting mechanism is configured to limit the displacement amount of the power unit 14 on both sides in the vehicle left-right direction.

  Thus, in the vibration isolating support structure 10, the relative displacement amount of the power unit 14 with respect to the vehicle body 16 in the left-right direction of the vehicle is regulated without increasing the number of parts or significantly complicating the structure in each engine mount 12. . Therefore, excessive deformation of the main rubber elastic body 24 can be prevented to improve durability, and effects such as weight reduction and cost reduction can be exhibited.

  Moreover, the engine mount 12 constituting the anti-vibration support structure 10 is provided with a side stopper mechanism that can limit the displacement of the power unit 14 in the left-right direction of the vehicle only on one side. The pair of engine mounts 12 are arranged so as to face each other, so that the anti-vibration support structure 10 as a whole includes a side displacement amount limiting mechanism that can limit the displacement of the power unit 14 on both sides in the vehicle left-right direction. . Therefore, an increase in weight or the like is prevented as compared to the case where each engine mount is provided with a stopper mechanism that can limit the displacement of the power unit 14 on both sides in the vehicle left-right direction.

  Further, in the engine mount 12, the bound stopper mechanism, the rebound stopper mechanism, the front and rear stopper mechanisms, and the side stopper mechanism are all constituted by the first mounting member 20 and the portal member 100. Therefore, excessive displacement of the power unit 14 is prevented in each of the vertical, front-rear, and left-right directions of the vehicle without increasing the number of parts, thereby improving durability and stabilizing running performance.

  Further, in the engine mount 12, the main rubber elastic body 24 is fitted in the mounting recess 58 of the first mounting member 20 and is fitted in the concave portion 46 of the second mounting member 22. Therefore, separation of the main rubber elastic body 24 from the first and second mounting members 20 and 22 is prevented. In particular, since the relative displacement amount of the first mounting member 20 and the second mounting member 22 is limited by each stopper mechanism, even if it is non-bonded, the holding force due to fitting into the recess is sufficient. Load resistance is realized.

  Further, the protruding tip of the outer peripheral wall portion 38 of the first mounting member 20 and the protruding tip of the peripheral wall portion 50 of the second mounting member 22 are separated from the outer peripheral surface of the main rubber elastic body 24. Thereby, it can avoid that the hard outer peripheral wall part 38 and the peripheral wall part 50 contact the outer peripheral surface of the main body rubber elastic body 24, and cause a crack etc. Moreover, even when the main rubber elastic body 24 is elastically deformed by the relative displacement amount of the first mounting member 20 and the second mounting member 22 being limited by the stopper mechanism, the outer peripheral wall portion 38 and the peripheral wall portion. 50 and the main rubber elastic body 24 are prevented from contacting each other, and a decrease in durability is avoided.

  Further, in the side stopper mechanism of the engine mount 12, the first mounting member 20 and the portal member 100 come into contact with each other at a predetermined distance in the width direction of the portal member 100. Therefore, the moment acting on the first mounting member 20 due to contact with the portal member 100 is reduced, torsional deformation around the central axis of the main rubber elastic body 24, and around the central axis of the power unit 14 Rotation and the like are prevented. As a result, durability can be improved and adverse effects on running performance due to changes in weight distribution or the like can be prevented.

  Further, in any of the bound stopper mechanism, the rebound stopper mechanism, the front and rear stopper mechanisms, and the side stopper mechanism, a buffer rubber is provided to alleviate the contact impact by the stopper rubber 78. As described above, the buffer rubbers of the plurality of stopper mechanisms provided on the engine mount 12 are integrally formed, and can be easily attached to the first mounting member 20 without adhesion. A plurality of stopper mechanisms that can suppress the contact impact with a small number of parts can be configured. In particular, the buffer rubber of the side stopper mechanism is provided by a tongue-shaped buffer protrusion 88 extending from the opening of the bag-shaped stopper rubber 78, and between the opposing surfaces constituting the side stopper mechanism. It is possible to arrange the buffer rubber without excess or deficiency.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the embodiment, the anti-vibration support structure 10 is configured by disposing the engine mounts 12 having the same structure on both sides of the power unit 14 in the left-right direction of the vehicle. As long as the two-way stopper mechanism is provided, the structures may be different from each other. Specifically, for example, one engine mount may have a truncated cone-shaped main rubber elastic body, and the other engine mount may have a quadrangular pyramid-shaped main rubber elastic body.

  Further, in the side stopper mechanism, the contact positions of the first mounting member 20 and the portal member 100 are not necessarily limited to two positions, and may be configured to contact at three or more positions. The contact may be made only at one place. In addition, when the contact is made at a plurality of locations, the plurality of contact locations may contact at the same time. The action can also be realized.

  Further, it is not necessary that the buffer rubber of each of the upper, lower, left and right and front and rear stopper mechanisms is provided by one stopper rubber 78, and for example, they may be constituted by different stopper rubbers. Furthermore, the buffer rubber may be fixed to, for example, a contact portion between the first mounting member side and the second mounting member side constituting the stopper mechanism.

  Further, the fitting recess 40 provided in the first mounting member 20 may not necessarily be an annular recess. For example, a central recess 30 is omitted and a cylindrical recess opening downward is provided. It may be.

  Further, for example, the first attachment member 20 may be attached to the vehicle body 16 side, and the second attachment member 22 may be attached to the power unit 14 side. Also in this case, the pair of engine mounts 12 are arranged on the left and right of the power unit 14 to constitute a lateral displacement amount limiting mechanism.

  Further, the application range of the present invention is not limited to the engine mount, and the present invention can be applied to various vibration isolators such as a body mount and a subframe mount. Furthermore, the scope of application of the present invention is not limited to a vibration isolator for automobiles, and the present invention can also be applied to a vibration isolator for motorcycles, industrial vehicles, railway vehicles, and the like.

10: anti-vibration support structure, 12: engine mount (vibration isolation device), 14: power unit, 16: vehicle body (vibration isolation target member), 20: first attachment member, 22: second attachment member, 24: Main body rubber elastic body, 28: connecting part, 40: fitting recess, 44: contact step (stopper part), 46: concave part, 78: stopper rubber, 80: upper bottom wall part, 88: buffering protrusion ( Tongue piece), 100: portal member

Claims (5)

A first attachment member and a second attachment member attached to one of the vibration body and the vibration isolation target member are connected by a main rubber elastic body, and the second attachment member includes the first attachment member. A gate-shaped member disposed across the gate-shaped member is attached, and a vibration-proof device in which a rebound stopper mechanism is configured by a facing portion of the first mounting member and the gate-shaped member is provided via the vibration-proof device. In the anti-vibration support structure of the vibration body in which the vibration body is supported by the anti-vibration target against vibration,
The first mounting member in the vibration isolator is provided with a connecting portion fixed to one of the vibrating body and the vibration isolating target member, and the connecting portion is an opening direction of the portal member. And extending to the one side in the opening direction of the gate-shaped member of the first mounting member and the second mounting member by the contact of the connecting portion with the portal-shaped member. While a side stopper mechanism for limiting the relative displacement amount is configured, a pair of the vibration isolating devices are arranged on both sides of the vibration body, and the side stopper mechanisms of the vibration isolating devices cooperate with each other. An anti-vibration support structure comprising a vibrating body lateral displacement limiting mechanism that limits the relative displacement of the vibrating body with respect to the anti-vibration target member on both sides.   2. The lateral stopper mechanism is configured by providing a stopper portion that comes into contact with the portal member at the connecting portion of the first mounting member at a plurality of locations separated in the width direction of the portal member. Anti-vibration support structure as described in 1.   The connecting portion is covered with a bag-like stopper rubber and is attached non-adheringly, and the stopper rubber is disposed at a contact portion with the gate-shaped member constituting the rebound stopper mechanism, and The anti-vibration support structure according to claim 1 or 2, wherein a tongue piece integrally formed with the stopper rubber is disposed at a contact portion with the portal member constituting the side stopper mechanism.   In the vibration isolator, the first attachment member and the second attachment member are not bonded to the main rubber elastic body, while the first attachment member is on the second attachment member side. And the second mounting member has a concave portion that opens toward the first mounting member, and is provided with one of the main rubber elastic bodies. The anti-vibration support according to any one of claims 1 to 3, wherein an end portion is fitted into the fitting recess, and the other end portion of the main rubber elastic body is fitted into the concave portion. Construction.   The vibration-proof support structure according to claim 4, wherein an opening-side end portion of each of the fitting recess and the peripheral wall of the concave portion is separated from the outer peripheral surface of the main rubber elastic body.

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