Vibration isolation device with bracket

Abstract

To improve positioning accuracy or positioning strength of a second attaching member to a bracket while ensuring assembling easiness in a vibration control device body, in a vibration control device with a bracket assembling the vibration control device body to the bracket from a side part.SOLUTION: A second attaching member 22 and a bracket 14 are made from metal, and the metal is exposed on an outer peripheral surface of a lower surface of one coupling portion 54a and made to metal-touch on an in-groove bottom surface 86 and an in-groove lower surface 76 of one coupling groove portion 72a. An upper energizing rubber 82 is provided on an upper surface of the coupling portion 54a and is made to abut on an in-groove upper surface 80 of the one coupling groove portion 72a. The metal is exposed on a lower surface of the other coupling portion 54b and made to metal-touch on an in-groove lower surface 76 of the other coupling groove portion 72b. An energizing rubber is provided on an upper surface and an outer peripheral surface of the coupling portion 54b and is made to abut on the in-groove upper surface 80 and the in-groove bottom surface 86 of the other coupling groove portion 72b. Furthermore, coming-off preventive engaging portions 106 and 108 for preventing the coming-off from the coupling groove portion are provided between each coupling portion and each coupling groove portion.SELECTED DRAWING: Figure 17

Description

Technical Field

[0001] The present invention relates to a vibration isolation device with a bracket used for an engine mount of an automobile or the like.

Background Art

[0002] Conventionally, as a kind of vibration isolation device for an engine mount of a vehicle or the like, a vibration isolation device with a bracket in which a vibration isolation device body is assembled to a bracket from the side is known. Such a vibration isolation device body has a structure in which a first mounting member and a second mounting member separated vertically are elastically connected by a main body rubber elastic body. Further, a pair of connecting groove portions are formed on the opposing inner surfaces of both leg portions of the bracket. Then, both pairs of connecting portions provided on the second mounting member of the vibration isolation device body are inserted into and fitted and supported by the pair of connecting groove portions of such a bracket, so that the vibration isolation device body is assembled to the bracket from the side.

[0003] By the way, in such a vibration isolation device with a bracket, a mechanism for preventing the vibration isolation device body assembled to the bracket from the side from coming out of the bracket in the direction opposite to the assembling direction is required.

[0004] Therefore, in Japanese Patent No. 5083405 (Patent Document 1) and Japanese Patent No. 6808544 (Patent Document 2), a second mounting member made of synthetic resin is adopted to form an engaging projection, and such an engaging projection is engaged with an engaging receiving portion provided on the bracket by a snap-fitting action or the like using elastic deformation of the synthetic resin material, thereby a mechanism for preventing the vibration isolation device from coming out of the bracket has been proposed.

[0005] However, in the mechanisms described in Patent Documents 1 and 2, when the vibration isolation device body is assembled to the bracket from the side, the engaging projection or the like of the second mounting member made of synthetic resin needs to be elastically deformed and engaged with the engaging receiving portion, and damage during deformation is likely to be a problem.

[0006] Moreover, since the second attachment member of the vibration isolation device body needs to be made of synthetic resin, it may be difficult to achieve the required load-bearing performance and strength characteristics, and there is also a risk that aging deterioration such as creep deformation may become a problem. Particularly in the case of an engine mount where the input load is large, due to dimensional changes in the connection part of the second attachment member caused by the aging deterioration of the synthetic resin, a gap may occur between such a connection part and the connection groove part of the bracket, and there was also a risk of generating abnormal noise due to rattling.

[0007] In view of such problems, the applicant of the present application proposed in Japanese Patent No. 6644640 (Patent Document 3) a composite structure in which a connecting portion of the vibration isolation device body inserted into the connecting groove portion of the bracket is integrally provided in a state where a connecting portion main body integrally formed with the second attachment member and a biasing rubber are stacked one on top of the other. In the connecting portion of such a composite structure, when the vibration isolation device body is assembled to the bracket from the side, the biasing rubber actively elastically deforms, so that deformation of the connecting portion main body can be reduced or avoided, and damage during assembly can be prevented. In addition, it becomes possible to make the second attachment member provided with the connecting portion main body made of metal, whereby the load-bearing performance and strength characteristics of the second attachment member and the connecting portion main body can be advantageously ensured, and aging deterioration such as creep deformation can also be avoided.

[0008] However, as a result of further study by the present inventor, it became clear that there is still room for further improvement in the vibration isolation device with a bracket disclosed in Patent Document 3. That is, in the vibration isolation device with a bracket disclosed in Patent Document 3, in the opposing direction of a pair of connecting groove portions provided in the bracket, a pair of connecting portions of the vibration isolation device body are positioned and supported by being in contact with the groove inner bottom surfaces of the pair of connecting groove portions via biasing rubbers provided on the outer peripheral surfaces, respectively.

[0009] Therefore, in the opposing direction of such a pair of connecting groove portions, the vibration isolation device is positioned with respect to the bracket by the balance of the biasing rubbers on both sides, and it may be difficult to perform highly accurate position setting. In addition, when the input load in one direction of the opposing direction of such a pair of connecting groove portions is large, it may be difficult to achieve sufficient load-bearing performance due to the presence of the biasing rubber.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0011] The present invention has been made against the background of the above circumstances, and the problem to be solved is to provide a novel extraction prevention mechanism that prevents damage to connecting parts and the like when assembling the vibration isolation device main body to the bracket from the side, as compared with those described in Patent Documents 1 and 2, and can also improve the load-bearing characteristics and suppress deterioration over time. In addition, as compared with that described in Patent Document 3, it is an object of the present invention to provide a vibration isolation device with a bracket having a novel structure that can improve the positioning accuracy of the vibration isolation device main body with respect to the bracket in the facing direction of a pair of connecting groove portions and improve the load-bearing performance on one side.

Means for Solving the Problems

[0012] Hereinafter, aspects of the present invention made to solve such problems will be described. Note that the constituent elements adopted in each of the aspects described below can be adopted in any combination as much as possible.

[0013] The first aspect of the present invention is as follows. In a vibration isolation device with a bracket in which a vibration isolation device main body in which an upper and lower separated first mounting member and second mounting member are elastically connected by a main body rubber elastic body is assembled to the bracket from the side, both side pairs of connection portions provided on the second mounting member are inserted into a pair of connection groove portions provided on the inner surfaces facing each other of both side legs of the bracket. The pair of connecting portions of the second mounting member and the pair of connecting groove portions of the bracket are both made of metal. On one of the connecting portions, metal is exposed on the outer peripheral surface and the lower surface, and metal-touch is made with the groove inner bottom surface and the groove inner lower surface of one of the connecting groove portions. An upper biasing rubber is provided on the upper surface and abuts against the groove inner upper surface of one of the connecting groove portions. On the other connecting portion, metal is exposed on the lower surface and metal-touch is made with the groove inner lower surface of the other connecting groove portion. An upper biasing rubber is provided on the upper surface and abuts against the groove inner upper surface of the other connecting groove portion. An outer peripheral biasing rubber is provided on the outer peripheral surface and abuts against the groove inner bottom surface of the other connecting groove portion. Due to the biasing force of the outer peripheral biasing rubber of the other connecting portion acting laterally on the second mounting member, the outer peripheral surface of one connecting portion of the second mounting member is pressed against the groove inner bottom surface of one of the connecting groove portions by metal-touch. A vibration-proof device with a bracket is provided with retaining engaging portions that are held in an engaged state by the biasing force of the outer peripheral biasing rubber between the outer peripheral surface of one connecting portion and one connecting groove portion and between the inner peripheral surface of the other connecting portion and the other connecting groove portion, respectively, to prevent the inserted connecting portions from coming out of the respective connecting groove portions.

[0014] In the vibration-proof device with a bracket of this embodiment, when inserting each connecting portion into the connecting groove and assembling the vibration-proof device body into the bracket in a press-fitting state, in the vertical direction, the upper biasing rubber is elastically deformed, and in the opposing direction of the pair of connecting groove portions, the outer peripheral biasing rubber is elastically deformed. Therefore, elastic deformation of the connecting portion is not required. Therefore, by making the second mounting member including the connecting portion made of metal, damage to the second mounting member including the connecting portion when assembling the vibration-proof device body into the bracket can be prevented, and problems such as play and strength reduction due to aging deterioration such as creep deformation in resin members can also be avoided.

[0015] Moreover, a pair of connecting portions provided on the second mounting member made of metal are pressed against the connecting groove portion of the bracket by the urging force of the upper urging rubbers provided on each upper surface with metal touch at each lower surface. Therefore, the load-bearing performance in the bounce direction (downward direction) where a particularly large load is likely to be input is improved.

[0016] Also, the outer peripheral surface of one of the connecting portions is pressed against the groove inner bottom surface of one of the connecting groove portions with metal touch by the urging force of the outer peripheral urging rubber provided on the other connecting portion. Therefore, the positioning accuracy of the vibration isolator main body with respect to the bracket is ensured favorably also in the facing direction of the pair of connecting groove portions. Also, in the direction in which one of the connecting portions is pressed against the groove inner bottom surface of one of the connecting groove portions with metal touch, the load-bearing performance can also be improved.

[0017] Furthermore, since retaining engagement portions for preventing the respective connecting portions from coming out of the respective connecting groove portions are provided between the pair of connecting groove portions and the pair of connecting portions inserted therein, a large retaining force is exerted, and even when a large load is input in the coming-out direction, the rotational displacement of the vibration isolator main body and the generation of moment force in the rotational direction are effectively suppressed, and the assembled state of the vibration isolator main body with respect to the bracket can be maintained more stably.

[0018] The second aspect of the present invention is as follows. The retaining engagement portion is one uneven engagement portion in which a stepped convex portion provided on the groove inner bottom surface of one of the connecting groove portions engages with a stepped concave portion provided on the outer peripheral surface of one of the connecting portions, and the other uneven engagement portion in which a stepped convex portion provided on an inner wall portion protruding from the groove inner bottom surface of the other connecting groove portion engages with a stepped concave portion provided on the inner peripheral surface of the other connecting portion and is configured to include the vibration isolator with bracket according to the first aspect described above.

[0019] In the anti-vibration device with brackets according to this aspect, the engagement action between the stepped surfaces of the concave portions of the respective connecting portions and the stepped surfaces of the convex portions of the respective connecting groove portions can prevent the respective connecting portions inserted into the respective connecting groove portions from coming out. Further, since the stepped surfaces of the concave portions of the respective connecting portions and the stepped surfaces of the convex portions of the respective connecting groove portions that engage with each other can be made into the contact surfaces of metal touch, the retaining engagement portion can be configured with great strength and positioning performance, and it becomes possible to advantageously ensure the load-bearing performance in the extraction direction in the anti-vibration device with brackets.

[0020] The third aspect of the present invention is as follows. In the retaining engagement portion, the locking surfaces that are locked to each other in the extraction direction of the connecting portion inserted into the connecting groove portion are provided within the central region that equally divides the second mounting member in the assembling direction to the bracket, and the anti-vibration device with brackets according to the first or second aspect.

[0021] In the anti-vibration device with brackets according to this aspect, in the assembling direction of the anti-vibration device main body to the bracket, the position of the locking surface of the retaining engagement portion can be set closer to the position of the central axis extending in the vertical direction of the anti-vibration device main body. Therefore, for example, play in the rotational direction around the central axis in the anti-vibration device main body can also be effectively prevented by the locking action on the locking surfaces of the retaining engagement portions provided on both sides.

[0022] The fourth aspect of the present invention is as follows. In the one connecting portion, the anti-vibration device with brackets according to any one of the first to third aspects, wherein the retaining engagement portion is partially provided in the vertical direction of the one connecting portion.

[0023] In the anti-vibration device with brackets according to this aspect, since the retaining engagement portion constituted by, for example, the convex portion in the connecting portion and the concave portion in the connecting groove portion is partially provided in the vertical direction, it becomes possible to ensure a larger area of metal touch between the outer peripheral surface of the one connecting portion and the groove inner bottom surface of the one connecting groove portion.

[0024] The fifth aspect of the present invention is as follows. On the tip surface in the assembling direction from the side to the bracket in the second mounting member, a tip biasing rubber is provided and is in contact with the bracket in the assembling direction, and the anti-vibration device with a bracket according to any one of the first to fourth aspects described above.

[0025] In the anti-vibration device with a bracket of this aspect, the biasing force by the tip biasing rubber is exerted in the direction opposite to the assembling direction to the bracket with respect to the anti-vibration device main body, so that in the retaining engagement portion, it is held in the contact engagement state that prevents the connecting portion from coming out of the connecting groove portion, and the positioning state in the insertion direction of the connecting portion with respect to the connecting groove portion is stabilized, which is also advantageous for preventing rattling and the like.

[0026] The sixth aspect of the present invention is as follows. On the groove inner bottom surface of the connecting groove portion, at least in the opening portion on the insertion port side where the connecting portion is inserted, a guide taper is provided that is inclined so as to increase the groove depth from the back side in the insertion direction of the connecting portion toward the opening side, and the anti-vibration device with a bracket according to any one of the first to fifth aspects described above.

[0027] In the anti-vibration device with a bracket of this aspect, the insertion of the connecting portion into the connecting groove portion is facilitated by being guided by the guide taper. Even if the biasing force of the outer peripheral biasing rubber provided on the connecting portion is set large, the workability of inserting the connecting portion into the connecting groove portion and thus the workability of assembling the anti-vibration device main body to the bracket can be maintained well.

Effects of the Invention

[0028] According to the present invention, it becomes possible to make the second mounting member including the connecting portion made of metal, and in each direction of the vertical direction, the facing direction of the pair of connecting groove portions, and further the assembling direction of the anti-vibration device main body to the bracket, it is possible to support the second mounting member in a positioned state with respect to the bracket by the metal touch of the connecting portion with respect to the bracket.

[0029] Therefore, compared with, for example, those described in Patent Documents 1 and 2, damage to the connecting portion or the like when assembling the vibration isolator main body to the bracket is prevented, and secular deterioration such as creep deformation in the connecting portion is also avoided. Further, compared with those described in Patent Document 3, improvement in the positioning accuracy of the vibration isolator main body with respect to the bracket in the facing direction of the pair of connecting groove portions can also be achieved.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiment for Carrying Out the Invention

[0031] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0032] In FIGS. 1-7, as an embodiment of a vibration isolator with a bracket having a structure according to the present invention, an engine mount 10 for an automobile is shown. The engine mount 10 has a structure assembled by so-called lateral insertion, in which a mount body 12 as a vibration isolator body is inserted laterally into a bracket 14 in the lateral direction. In the following description, in principle, the vertical direction refers to the vertical direction in FIG. 3 along the mount central axis. Further, in the engine mount 10 of the present embodiment, assuming that the vertical direction in FIG. 3 is the vertically vertical direction, the left-right direction in the figure is the vehicle front-rear direction, and the direction perpendicular to the paper surface in the figure is the vehicle left-right direction, and it is mounted between the vehicle body and the power unit of the automobile. However, giving priority to easy understanding on the drawing, in the following description, the left-right direction in FIG. 3 is referred to as the mount left-right direction, and the direction perpendicular to the paper surface in the figure is referred to as the mount front-rear direction (or depth / front-back direction). In each figure, each rubber elastic body (biasing rubber) provided on the mount body 12 is shown in the shape before being assembled to the bracket 14 in order to easily determine the presence or absence of compression in the assembled state to the bracket 14.

[0033] More specifically, as shown in a single state in FIGS. 8-11 in addition to FIGS. 1-7, the mount body 12 has a structure in which a first attachment member 20 and a second attachment member 22 are elastically connected by a main body rubber elastic body 24. A support load and vibration of the power unit are input between the first attachment member 20 and the second attachment member 22.

[0034] The first mounting member 20 is a high-rigidity member formed of metal or the like, and has a solid block structure such as an upside-down frustum of a cone shape. As illustrated in FIGS. 1-4, a mounting member 26 to be mounted on a power unit or the like is fixed to such a first mounting member 20 with a fixing bolt or the like.

[0035] The second mounting member 22 is a high-rigidity member formed of a metal such as an aluminum alloy or steel, and has a generally thick-ring-shaped block shape as a whole. In particular, in the present embodiment, as can be understood from FIG. 6, it has a round-cornered rectangular through-hole in the center and has a generally rectangular thick-ring-shaped block shape as a whole.

[0036] The main body rubber elastic body 24 that elastically connects these first mounting member 20 and second mounting member 22 has an outer peripheral surface shape in which the circumferential direction is substantially oval or round-cornered rectangular and the outer diameter dimension gradually decreases from bottom to top. The first mounting member 20 is fixedly attached in a substantially embedded state so as to be inserted into the small-diameter portion at the upper end, and the second mounting member 22 is fixedly attached to the outer peripheral portion with a large diameter at the lower end. Note that the main body rubber elastic body 24 is preferably formed as an integrally vulcanized molded product including the first and second mounting members 22.

[0037] A reverse recess 28 that opens at the center of the lower surface is formed in the main body rubber elastic body 24, and such a recess 28 opens downward through the through-hole of the second mounting member 22. Further, a sealing member 30 is overlapped and assembled to the second mounting member 22 from below.

[0038] The sealing member 30 is formed of a hard synthetic resin material or the like, and has a substantially thick-walled annular block shape corresponding to the second mounting member 22. Further, the sealing member 30 has a support bottom portion 32 that protrudes inward from the lower end, and the cross-sectional shape of the sealing member 30 is substantially L-shaped. A flexible film 34 and an orifice member 36 are inserted into such a sealing member 30 from above and assembled in a housed state so as to be overlapped on the support bottom portion 32. And these flexible film 34 and orifice member 36 are fixedly supported by being sandwiched vertically between the second mounting member 22 and the sealing member 30 at their respective outer peripheral portions.

[0039] Also, above the sealing member 30, the space between the second mounting member 22, the sealing member 30, and the orifice member 36 is sealed by sandwiching a seal rubber 38 provided on the lower surface of the second mounting member 22. Further, below the sealing member 30, the space between the sealing member 30 and the orifice member 36 is sealed by sandwiching the outer peripheral portion of the flexible film 34 vertically.

[0040] As a result, the recess 28 of the main body rubber elastic body 24 is covered with the flexible film 34 and sealed in a liquid-tight manner, thereby defining a liquid chamber 40 filled with a predetermined liquid. Further, such a liquid chamber 40 is partitioned vertically by a substantially plate-shaped orifice member 36. And above the orifice member 36, a part of the wall portion is constituted by the main body rubber elastic body 24, and a pressure receiving chamber 42 in which pressure fluctuations are generated along with vibration input is formed. Also, below the orifice member 36, a part of the wall portion is constituted by a flexible film 34 such as diaphragm rubber, and a volume-variable balance chamber 44 in which pressure fluctuations are absorbed is formed.

[0041] These pressure receiving chambers 42 and balance chambers 44 are communicated with each other through an orifice passage 46 provided in the orifice member 36, and a vibration damping effect utilizing the flow action of the fluid flowing through the orifice passage 46 during vibration input is exerted. In this embodiment, an accommodation region located at the central portion of the orifice member 36 and extending in a direction orthogonal to the mount central axis is formed and communicated with the pressure receiving chamber 42 and the balance chamber 44, respectively, and a movable film 48 is accommodated and disposed in such an accommodation region. Then, for example, during vibration input in a high frequency range exceeding the tuning frequency of the orifice passage 46, the pressure fluctuation in the pressure receiving chamber 42 is reduced or absorbed based on the deformation or displacement of the movable film 48, and significant high dynamic springing is avoided.

[0042] Note that the specific structure of the liquid chamber 40, the tuning characteristics of the orifice passage 46, the presence or absence of a high-frequency liquid pressure absorption mechanism by the movable film 48, etc. are not limited and can be appropriately set according to the required vibration damping characteristics. Also, the assembling structure of the sealing member 30 to the second mounting member 22 is not limited, but in this embodiment, a locking mechanism by hooking using a resin hook is adopted.

[0043] That is, the locking mechanism is constituted by a locking claw 50 formed to protrude on the outer peripheral surface of the second mounting member 22 and a flexible locking piece 52 provided to extend upward on the outer peripheral surface of the sealing member 30. These locking claws 50 and locking pieces 52 are provided at corresponding positions to form a pair, and a plurality of pairs are provided in the circumferential direction of the second mounting member 22 and the sealing member 30. Particularly in this embodiment, in the second mounting member 22 and the sealing member 30, two pairs of locking claws 50 and locking pieces 52 are provided at each portion extending substantially linearly on both sides in the front-rear direction.

[0044] The locking piece 52 has a substantially inverted U-shape and is provided with a locking hole extending vertically in the central portion. By hooking the locking claw 50 into this locking hole, the sealing member 30 is assembled and fixed to the second mounting member 22. Note that the hooking of each locking claw 50 to each locking piece 52 can be performed substantially simultaneously by utilizing the elastic deformation and restoration of each locking piece 52. This is achieved by overlapping the upper surface of the sealing member 30 from below with respect to the lower surface of the second mounting member 22 and approaching while pressing the rubber seal 38.

[0045] Furthermore, on the outer peripheral portions on the left and right sides where the locking claws 50 are not formed on the second mounting member 22 to which the sealing member 30 is assembled, a pair of connecting portions 54, 54 are provided which extend linearly in the front-rear direction with a substantially constant thickness. In the state where the second mounting member 22 is assembled to the bracket 14 of the mount body 12, the second mounting member 22 is fixedly supported by the bracket 14 by utilizing these connecting portions 54, 54.

[0046] The bracket 14 is a high-rigidity member formed of a metal such as an aluminum alloy or a fiber-reinforced resin. As shown in FIGS. 12 - 14 in addition to FIGS. 1 - 7, it integrally includes left and right mounting leg portions 60, 60 that rise upward from the upper surface of a substantially rectangular flat base portion 58, and a top plate portion 62 that integrally connects the upper end portions of these left and right mounting leg portions 60, 60. And in a state surrounded by these base portion 58, left and right mounting leg portions 60, 60, and top plate portion 62, an assembly space 66 into which the mount body 12 is assembled is formed with an opening on the side.

[0047] Note that on the back side of the assembly space 66 (the side opposite to the side with the opening to the side), a back wall 68 is integrally provided so as to close the opening of the assembly space 66. On the upper portion of such a back wall 68, an insertion hole 70 for inserting the mounting member 26 and assembling it to the mount body 12 (the first mounting member 20) is formed. Also, both sides of the base portion 58 are fixed plate portions that extend outward from each mounting leg portion 60. In such a pair of fixed plate portions, the bracket 14 is bolted to the vehicle body side.

[0048] The left and right mounting legs 60, 60 are made of thick plate-shaped members having a predetermined width dimension in the front-rear direction, and face each other on the left and right. Further, connecting groove portions 72, 72 that open to the inner surfaces facing each other and extend in the front-rear direction are formed in the left and right mounting legs 60, 60.

[0049] Then, a pair of connecting portions 54, 54 provided on the second attachment member 22 of the mount body 12 are inserted into the pair of connecting groove portions 72, 72 from the side, and as shown in FIGS. 15-17, the mount body 12 is horizontally inserted into the bracket 14 and assembled. Incidentally, in such an assembled state, the sealing member 30 of the mount body 12 is supported by being overlapped with the bottom wall lower surface in contact with the upper surface of the base portion 58 of the bracket 14.

[0050] Here, in the state where the mount body 12 is assembled to the bracket 14, the pair of connecting portions 54, 54 of the second attachment member 22 are positioned and fixedly supported by the connecting groove portions 72, 72 of the bracket 14, and each pair of connecting portions 54, 54 and connecting groove portions 72, 72 have a special configuration.

[0051] Specifically, each connecting portion 54 of the second attachment member 22 is provided by extending a middle portion in the front-rear direction at a predetermined length at the left and right end portions of the second attachment member 22. The lower surfaces 74, 74 of the pair of connecting portions 54, 54 expose the metal second attachment member 22, and together with the groove inner lower surfaces 76, 76 of the corresponding connecting groove portions 72, 72, they linearly extend in the front-rear direction with a substantially horizontal and flat metal surface.

[0052] Incidentally, the upper surfaces 78, 78 of the pair of connecting portions 54, 54 and the groove inner upper surfaces 80, 80 of the pair of connecting groove portions 72, 72 may also be flat surfaces that extend substantially horizontally in the front-rear direction. However, in the present embodiment, the groove inner upper surfaces 80, 80 of the connecting groove portions 72, 72 are inclined surfaces that gradually incline upward toward the opening (the right end in FIG. 7) over a predetermined length on the opening side (the front side), so as to improve the workability of inserting the connecting portions 54, 54.

[0053] As can be understood from FIG. 7 and the like, the vertical thickness dimension of such a pair of connecting portions 54, 54 is slightly smaller than the vertical dimension within the groove (groove width dimension) of the pair of connecting groove portions 72, 72. Further, upper urging rubbers 82, 82 are provided on the upper surfaces 78, 78 of the pair of connecting portions 54, 54, respectively.

[0054] The thickness dimension of this upper urging rubber 82 (the protruding height dimension upward from the connecting portion 54) is made larger than the difference between the vertical thickness dimension of the connecting portion 54 and the vertical dimension within the groove of the connecting groove portion 72. As a result, when the pair of connecting portions 54, 54 are inserted into the pair of connecting groove portions 72, 72 and the second attachment member 22 assembled to the bracket 14 abuts against the upper surfaces 80, 80 within the grooves of the connecting groove portions 72, 72 and is compressed, the lower surfaces 74, 74 of the pair of connecting portions 54, 54 are pressed against the lower surfaces 74, 74 within the grooves of the connecting groove portion 72 with metal touch and are positioned.

[0055] Also, the outer peripheral surfaces 84, 84 of the pair of connecting portions 54, 54 may extend in parallel with each other in the front-rear direction with a constant width in the vertical direction, but in the present embodiment, they are inclined surfaces such that the protruding height toward the outer periphery gradually and slightly increases from the back (the upper front side in FIG. 6) to the front (the lower rear side in FIG. 6).

[0056] The left-right separation dimension between the outer peripheral surfaces 84, 84 of such a pair of connecting portions 54, 54, that is, the outer dimension of the second attachment member 22 in the left-right direction at the formation site of the connecting portions 54, 54, is slightly smaller than the opposing distance between the bottom surfaces 86, 86 within the grooves of the pair of connecting groove portions 72, 72, as can be understood from FIG. 6 and the like. Further, the outer peripheral surface 84 of one connecting portion (the left connecting portion in FIGS. 2, 3, 5, and 6) 54a is a metal surface where the metal second attachment member 22 is exposed, and is overlapped with the metal surface of the bottom surface 76 within the groove of one connecting groove portion 72a.

[0057] Note that the groove inner bottom surfaces 86, 86 of the pair of connecting groove portions 72, 72 are formed in a planar shape corresponding to the outer peripheral surfaces 84, 84 of the pair of connecting portions 54, 54, and are configured to be in metal contact over substantially the entire surface. That is, in the present embodiment, the groove inner bottom surfaces 86, 86 of the pair of connecting groove portions 72, 72 correspond to the outer peripheral surfaces 84, 84 of the pair of connecting portions 54, 54, and are inclined surfaces such that the distance between the opposing surfaces of the pair of groove inner bottom surfaces 86, 86 gradually increases from the back to the front. In particular, in the present embodiment, substantially the entire inner opposing surfaces of the pair of mounting leg portions 60, 60 of the bracket body 12 are inclined surfaces such that the distance between the opposing surfaces gradually increases from the back to the front. As a result, the connecting groove portion 72 having the inclined groove inner bottom surface 86 has a substantially constant groove depth dimension from the front side to the back side.

[0058] Furthermore, an outer peripheral biasing rubber 88 is provided over substantially the entire surface of the outer peripheral surface 84 of the other connecting portion 54b. The thickness dimension of the outer peripheral biasing rubber 88 (the protruding height dimension laterally from the connecting portion 54b) is made larger than the difference between the left-right separation dimension between the outer peripheral surfaces 84, 84 of the pair of connecting portions 54, 54 and the opposing distance between the groove inner bottom surfaces 86, 86 of the pair of connecting groove portions 72, 72.

[0059] As a result, when the pair of connecting portions 54, 54 are inserted into the pair of connecting groove portions 72, 72 and the second attachment member 22 assembled to the bracket 14 abuts against the groove inner bottom surface 86 of the other connecting groove portion 72b on the other connecting portion 54b side and is compressed, the outer peripheral surface 84 of one connecting portion 54a is pressed against the groove inner bottom surface 76 of one connecting groove portion 72a by the repulsive elastic force of the compressed outer peripheral biasing rubber 88 and is positioned.

[0060] Furthermore, between one connecting portion 54a and one connecting groove portion 72a and between the other connecting portion 54b and the other connecting groove portion 72b, there are provided retaining engagement portions that are held in an engaged state by the biasing force of the outer peripheral biasing rubber 88 to prevent the pair of connecting portions 54, 54 inserted into the pair of connecting groove portions 72, 72 from coming out.

[0061] In this embodiment, the anti-pull engagement portion between one connecting portion 54a and one connecting groove portion 72a is constituted by a stepped concave portion 90 provided on the outer peripheral surface 84 of the one connecting portion 54a and a stepped convex portion 92 provided on the groove inner bottom surface of the one connecting groove portion 72a.

[0062] The stepped concave portion 90 of the one connecting portion 54a is formed in a notch shape that extends from the rear end to approximately the center in the frontward direction on the outer peripheral surface 84 of the connecting portion 54a. A locking surface 94 is constituted by a flat surface that extends in the up, down, left, and right directions perpendicular to the front-rear direction by a stepped surface that is the front-side end surface of the stepped concave portion 90. In particular, in this embodiment, such a stepped concave portion 90 is formed with a size from the lower end to the middle portion in the vertical direction of the connecting portion 54a. Thereby, in the one connecting portion 54a, it is avoided that the contact area by metal touch with respect to the groove inner bottom surface 86 of the one connecting groove portion 72a is significantly impaired by the stepped concave portion 90, and an improvement in load-bearing performance and the like on the metal touch surface is achieved.

[0063] The stepped convex portion 92 of the one connecting groove portion 72a is formed in a ridge shape that extends from the rear end to approximately the center in the frontward direction on the groove inner bottom surface 86 of the connecting groove portion 72a. A locking surface 96 is constituted by a flat surface that extends in the up, down, left, and right directions perpendicular to the front-rear direction by a stepped surface that is the front-side end surface of the stepped convex portion 92. In particular, in this embodiment, such a stepped convex portion 92 is formed with a size from the lower end to the middle portion in the vertical direction of the groove inner bottom surface 86 of the connecting groove portion 72a.

[0064] As a result, the stepped convex portion 92 of the connecting groove portion 72a enters and is substantially accommodated in the stepped concave portion 90 of the connecting portion 54a, and the locking surface 94 of the connecting portion 54a abuts against the locking surface 96 of the stepped convex portion 92 from the back side toward the front side, thereby preventing the connecting portion 54a inserted into the connecting groove portion 72a from coming out toward the front side. In particular, in the present embodiment, the locking surfaces 94 and 96 that abut against each other are overlapped by metal touch, thereby improving the load-bearing performance. Further, the contact position of these two locking surfaces 94 and 96 is provided within the central region that equally divides the second mounting member 22 in the mounting direction to the bracket 14 (the vertical direction in FIG. 5). Thus, for example, play in the rotational direction around the central axis of the mount body 12 can also be effectively suppressed by the locking action due to the contact of the two locking surfaces 94 and 96.

[0065] Further, in the present embodiment, the anti-disengagement engaging portion between the other connecting portion 54b and the other connecting groove portion 72b is constituted by a stepped concave portion 100 provided in the inner portion of the other connecting portion 54b and a stepped convex portion 102 provided at the opening portion of the other connecting groove portion 72b.

[0066] That is, on the inner peripheral side of the other connecting portion 54b, a front-rear groove 104 that opens on the lower surface and extends in the front-rear direction is formed. On the outer wall surface of the front-rear groove 104, the stepped concave portion 100 is formed in a notch shape that extends from the rear end to substantially the center toward the front. And a locking surface 106 is constituted by a flat surface that extends in the vertical and horizontal directions orthogonally to the front-rear direction by the stepped surface that is the front-end surface of the stepped concave portion 100.

[0067] The stepped convex portion 102 of the connecting groove portion 72b of the other party is formed by an inner wall portion protruding upward from the lower surface 76 inside the groove of the connecting groove portion 72b. That is, the inner wall portion 102 as the stepped convex portion has a substantially constant cross-sectional shape along the opening edge of the connecting groove portion 72b and is in the shape of a vertical wall extending from the rear end of the connecting groove portion 72b toward the front to approximately the center. And a locking surface 108 is formed by a stepped surface that is the front end surface of such a stepped convex portion 102 and has a plane extending in the vertical and horizontal directions perpendicular to the front-rear direction.

[0068] As a result, the stepped convex portion (inner wall portion) 102 of the connecting groove portion 72b enters and is substantially accommodated in the stepped concave portion 100 of the connecting portion 54b. By the locking surface 106 of the connecting portion 54b abutting against the locking surface 108 of such a stepped convex portion 102 from the back to the front, the connecting portion 54b inserted into the connecting groove portion 72b is prevented from coming out to the front side. In particular, in this embodiment, the locking surface 106 and the locking surface 108 that abut against each other are overlapped by metal touch to improve the load-bearing performance.

[0069] Also, in this embodiment, the locking surfaces 94 and 96 in the retaining engagement portion of one connecting portion 54a and the connecting groove portion 72a, and the locking surfaces 106 and 108 in the retaining engagement portion of the other connecting portion 54b and the connecting groove portion 72b are set at substantially the same position in the front-rear direction, and are positioned on both the left and right sides on a straight line including the mount central axis. Thereby, the force for preventing the mount body 12 from coming out of the bracket 14 is more stably and efficiently exerted.

[0070] Incidentally, in the state where the mounting body 12 is assembled to the bracket 14, the stepped concave portion 90 and the stepped convex portion 92 at the retaining engagement portion between one connecting portion 54a and the connecting groove portion 72a, and the stepped concave portion 100 and the stepped convex portion 102 at the retaining engagement portion between the other connecting portion 54b and the connecting groove portion 72b may be in contact with each other in the left - right direction. Preferably, however, they are opposed to each other in the left - right direction with a slight gap therebetween. Thereby, the contact state in the metal touch between the outer peripheral surface 84 of one connecting portion 54a and the groove inner bottom surface 76 of one connecting groove portion 72a can be more stably exhibited.

[0071] By the way, the fixed support state of the second attachment member 22 to the bracket 14 by the assembly of the pair of connecting portions 54, 54 to the pair of connecting groove portions 72, 72 as described above is realized by inserting the pair of connecting portions 54, 54 into the pair of connecting groove portions 72, 72 from the front to the back and pushing them forward, and press - fitting until the second attachment member 22 reaches a position where it is substantially accommodated in the bracket 14, as shown in FIGS. 15 - 17.

[0072] First, as shown in FIG. 15, insert the mount body 12 through the opening of the mounting space 66 of the bracket 14, and insert the pair of connecting portions 54, 54 of the second mounting member 22 into the pair of connecting groove portions 72, 72 of the bracket 14 from the front-side opening. At this time, the distance between the opposing surfaces of the groove inner bottom surfaces 86, 86 of the pair of connecting groove portions 72, 72 increases toward the left and right outer sides from the back side to the front side, and the left and right dimensions between the outer peripheral surfaces 84, 84 of the pair of connecting portions 54, 54 decrease toward the front side (back side) in the insertion direction. Therefore, the pair of connecting portions 54, 54 can be easily inserted into the pair of connecting groove portions 72, 72. In particular, the other connecting groove portion 72b has a larger inclination angle of the groove inner bottom surface 86 toward the outside in the vicinity of the front-side end (see FIGS. 6 and 14, etc.), preventing the outer peripheral biasing rubber 88 from being caught. Also, in the vertical direction, the groove inner upper surfaces 80 of the respective connecting groove portions 72 are gradually inclined upward from the back side to the front side, and the inclination angle is particularly large in the vicinity of the front-side end (see FIGS. 7 and 15, etc.), preventing the upper biasing rubbers 82, 82 from being caught and making it even easier to insert the connecting portions 54, 54 into the connecting groove portions 72, 72. Note that the outer peripheral biasing rubber 88 and the upper biasing rubbers 82, 82 can also be made into a tapered shape in which the rubber thickness dimension at the front-side end in the insertion direction is made smaller and gradually increases toward the back side in the insertion direction, making it even easier to insert the connecting portions 54, 54 into the connecting groove portions 72, 72.

[0073] Furthermore, as shown in FIG. 16, a pair of connecting portions 54, 54 inserted into the pair of connecting groove portions 72, 72 of the bracket 14 will be pushed further inward. At this time, the lower surfaces 74, 74 of the respective connecting portions 54, 54 are overlapped with the inner groove lower surfaces 76, 76 of the connecting groove portions 72, 72 by metal touch, and the flat lower surfaces 74, 74 are guided to move inward while sliding on the flat inner groove lower surfaces 76, 76. In the other connecting portion 54b, the outer peripheral biasing rubber 88 abuts against the inner groove bottom surface 86 of the other connecting groove portion 72b, and the second mounting member 22 is pressed to the left as a whole by the compression reaction force thereof. However, the outer peripheral surface 84 of one connecting portion 54a abuts against the stepped convex portion (inner wall portion) 92 formed in the one connecting groove portion 72a and moves inward on the stepped convex portion 92 while being separated from the inner groove bottom surface 86 of the connecting groove portion 72a.

[0074] Then, as shown in FIG. 17, when the pair of connecting portions 54, 54 are pushed to the innermost along the pair of connecting groove portions 72, 72 of the bracket 14, the locking surface 94 of the stepped concave portion 90 formed in one connecting portion 54a reaches the locking surface 96 of the stepped convex portion 92 of the one connecting groove portion 72a, so that the outer peripheral surface 84 of the one connecting portion 54a is disengaged from the contact state with the stepped convex portion (inner wall portion) 92 formed in the one connecting groove portion 72a. Substantially simultaneously with this, the locking surface 106 of the stepped concave portion 100 formed in the other connecting portion 54b reaches the locking surface 108 of the stepped convex portion 102 of the other connecting groove portion 72b, so that the outer peripheral surface 84 of the other connecting portion 54b is disengaged from the contact state with the stepped convex portion (inner wall portion) 102 formed in the other connecting groove portion 72b. As a result, the whole of the second mounting member 22 moves to the left by the compression reaction force of the outer peripheral biasing rubber 88. As a result, the outer peripheral surface 84 of the one connecting portion 54a can be brought into metal touch with the inner groove bottom surface 86 of the one connecting groove portion 72a and held in a pressed state.

[0075] Also, as shown in Fig. 17, in the assembled state where the pair of connecting portions 54, 54 are pushed all the way to the innermost side with respect to the pair of connecting grooves 72, 72, the locking surface 94 of the stepped recess 90 of one connecting portion 54a is overlapped with the locking surface 96 of the stepped protrusion 92 of one connecting groove 72a from the back side to the front side in the assembling direction of the second mounting member 22 with respect to the bracket 14 and is in metal contact and abutted. Further, the locking surface 106 of the stepped recess 100 of the other connecting portion 54b is overlapped with the locking surface 108 of the stepped protrusion 102 of the other connecting groove 72b from the back side to the front side in the assembling direction of the second mounting member 22 with respect to the bracket 14 and is in metal contact and abutted. By such abutments on both the one and the other sides, the second mounting member 22 is prevented from coming out of the bracket 14.

[0076] Particularly in this embodiment, a tip biasing rubber 112 that protrudes toward the outer periphery (back side) is provided at the tip end surface in the assembling direction of the second mounting member 22 with respect to the bracket 14. In the assembled state of Fig. 17, when such tip biasing rubber 112 abuts against the back wall 68 of the bracket 14, its elastic abutment reaction force acts to press the locking surfaces 94, 106 of the connecting portions 54a, 54b and the locking surfaces 96, 108 of the connecting grooves 72a, 72b in the abutting direction, respectively. Thereby, the locking surfaces 94, 106 of the connecting portions 54a, 54b and the locking surfaces 96, 108 of the connecting grooves 72a, 72b are held in an abutting state, and rattling and the like are prevented.

[0077] As is clear from the above description, since the second mounting member 22 is positioned by metal contact in the vertical direction, also in the horizontal direction, and further in the front-rear direction with respect to the bracket 14, it becomes possible to position and support the second mounting member 22 with respect to the bracket 14 with high precision and with a large load-bearing performance.

[0078] Also, when the second mounting member 22 is assembled to the bracket 14, the flat lower surfaces 74, 74 of the pair of connecting portions 54, 54 are guided so as to slide on the flat inner lower surfaces 76, 76 of the pair of connecting groove portions 72, 72, and the second mounting member 22 is assembled by substantially parallel movement. Therefore, tilting of the second mounting member 22 with respect to the bracket 14 during the assembling operation is avoided. Therefore, the second mounting member 22 can be easily assembled to the bracket 14. Also, for example, when the second mounting member 22 is assembled to the bracket 14, if the entire mount body 12 is tilted and the sealing member 30 hooked and engaged with the second mounting member 22 locally and strongly abuts against the base portion 58 of the bracket 14, etc., partial and temporary deterioration of the sealing performance between the second mounting member 22 and the sealing member 30, such as liquid leakage, can also be avoided.

[0079] As described above, the embodiments of the present invention have been described in detail, but the present invention is not limited by the specific description. For example, the upper urging rubber 82, the outer peripheral urging rubber 88, etc. may be integrally formed with the main body rubber elastic body 24, or may be separately formed. Also, the upper and lower urging rubbers 82, the outer peripheral urging rubbers 88, the tip urging rubber 112, etc. may be integrally formed with each other, or may be separately formed.

[0080] Also, the guide mechanism when inserting the connecting portions 54a, 54b of the second mounting member 22 along the connecting groove portions 72a, 72b of the bracket 14 is not limited to the mechanism that slidably guides the connecting portions 54a, 54b on both sides by the convex portions 92, 102 provided in the connecting groove portions 72a, 72b on both sides as described above. For example, on only one side, the connecting portion 54 may be slidably guided by the connecting groove portion 72. Also, such a guide mechanism is not essential in the present invention. For example, without providing such a sliding guide mechanism, the connecting portion may be inserted into the connecting groove portion by getting over a protrusion or the like constituting the retaining engagement portion.

[0081] In the above-described embodiment, a liquid-sealed mount body 12 was exemplified as the vibration isolator body. However, for example, a solid-type vibration isolator body in which a first attachment member and a second attachment member are elastically connected by a main body rubber elastic body and which does not include a liquid chamber, an active liquid-sealed vibration isolator body that obtains an active vibration isolation effect by an actuator, a switching-type liquid-sealed vibration isolator body in which vibration isolation characteristics can be switched, etc. can also be adopted.

[0082] The specific structure of the bracket shown in the above-described embodiment is merely an example, and as long as it has a connecting groove portion, the attachment structure to the vehicle body, the presence or absence of the top plate portion and the bottom plate portion, and the specific structure, etc. can be appropriately changed.

Explanation of Reference Numerals

[0083] 10 Engine mount 12 Mount body 14 Bracket 20 First attachment member 22 Second attachment member 24 Main body rubber elastic body 26 Attachment member 28 Recess (main body rubber elastic body) 30 Sealing member 32 Support bottom (sealing member) 34 Flexible film 36 Orifice member 38 Seal rubber (lower surface of the second attachment member) 40 Liquid chamber 42 Pressure receiving chamber 44 Balance chamber 46 Orifice passage 48 Movable film 50 Locking claw 52 Locking piece 54 Connecting portion (second attachment member) 54a One connecting portion 54b The other connecting portion 58 Base portion 60 Attachment leg 62 Top plate portion 66 Assembly space 68 Rear wall 70 Insertion hole 72 Connecting groove part 72a One connecting groove part 72b The other connecting groove part 74 Bottom surface (connecting part) 76 Bottom surface inside the groove (connecting groove part) 78 Top surface (connecting part) 80 Top surface inside the groove (connecting groove part) 82 Upper urging rubber 84 Outer peripheral surface (connecting part) 86 Bottom surface of the groove inside (connecting groove part) 88 Outer peripheral urging rubber 90 Recess (one connecting part) 92 Protrusion (one connecting groove part) 94 Locking surface (recess) 96 Locking surface (protrusion) 100 Recess (the other connecting part) 102 Protrusion (inner wall part, the other connecting groove part) 104 Front and rear grooves 106 Locking surface (recess) 108 Locking surface (protrusion) 112 Tip urging rubber

Claims

1. In a vibration isolator with a bracket, in which a vibration isolator main body in which an upper and lower separated first mounting member and a second mounting member are elastically connected by a main body rubber elastic body is laterally assembled to the bracket by inserting a pair of connecting portions provided on both sides of the second mounting member into a pair of connecting groove portions provided on the inner surfaces of both leg portions of the bracket facing each other, both the pair of connecting portions of the second mounting member and the pair of connecting groove portions of the bracket are made of metal, one of the connecting portions has metal exposed on the outer peripheral surface and the lower surface and is in metal touch with the groove inner bottom surface and the groove inner lower surface of one of the connecting groove portions, and an upper biasing rubber is provided on the upper surface and abuts against the groove inner upper surface of one of the connecting groove portions, the other connecting portion has metal exposed on the lower surface and is in metal touch with the groove inner lower surface of the other connecting groove portion, and an upper biasing rubber is provided on the upper surface and abuts against the groove inner upper surface of the other connecting groove portion, and an outer peripheral biasing rubber is provided on the outer peripheral surface and abuts against the groove inner bottom surface of the other connecting groove portion, while the biasing force of the outer peripheral biasing rubber of the other connecting portion acts laterally on the second mounting member, the outer peripheral surface of one connecting portion of the second mounting member is pressed against the groove inner bottom surface of one connecting groove portion by metal touch, a vibration isolator with a bracket, in which a retaining engagement portion is provided between the outer peripheral surface of one connecting portion and one connecting groove portion and between the inner peripheral surface of the other connecting portion and the other connecting groove portion, and is held in an engaged state by the biasing force of the outer peripheral biasing rubber to prevent the inserted connecting portions from coming out of the respective connecting groove portions.

2. The retaining engagement portion is one uneven engagement portion in which a stepped convex portion provided on the groove inner bottom surface of one of the connecting groove portions engages with a stepped concave portion provided on the outer peripheral surface of one of the connecting portions, and the other uneven engagement portion in which a stepped convex portion provided on an inner wall portion protruding from the groove inner bottom surface of the other connecting groove portion engages with a stepped concave portion provided on the inner peripheral surface of the other connecting portion, and the vibration isolator with a bracket according to claim 1, which is configured to include.

3. ​

4. The vibration isolator with bracket according to any one of claims 1 to 3, wherein in the one connecting portion, the retaining engagement portion is partially provided in the vertical direction of the one connecting portion.

5. The vibration isolator with bracket according to any one of claims 1 to 4, wherein a tip biasing rubber is provided on the tip surface in the assembling direction from the side to the bracket in the second mounting member and is abutted against the bracket in the assembling direction.

6. The vibration isolator with bracket according to any one of claims 1 to 5, wherein a guide taper inclined so as to increase the groove depth from the inner side in the insertion direction of the connecting portion toward the opening side is provided on the groove inner bottom surface of the connecting groove portion at least at the opening portion on the insertion port side where the connecting portion is inserted.

Images