Liquid-sealed vibration isolator with brackets

Abstract

To provide a liquid seal vibration control device assembling a vibration control device body to a bracket from a side part, which has a new structure, and can improve positioning accuracy or positioning strength of a second attaching member to the bracket and reduces the risk of liquid leakage at assembling while ensuring assembling easiness to the bracket of the second attaching member in the vibration control device body.SOLUTION: Both of a second attaching member 22 and a bracket 14 are made from metal. Lower surfaces 74 and 74 of coupling portions 54 and 54 are metal-touched on in-groove bottom surfaces 88 and 88 of coupling groove portions 72 and 72. A coming-off preventive engaging portion is configured by metal touch, which engages engaging projecting portions 86 and 86 projecting downward at deep side end portions of the coupling portions 54 and 54 with engaging recessed portions 84b and 84b provided on in-groove lower surfaces 76 and 76 of the coupling groove portions 72 and 72, thereby preventing the coming-off of the coupling portions 54 and 54 inserted in the coupling groove portions 72 and 72.SELECTED DRAWING: Figure 18

Description

Technical Field

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

Background Art

[0002] Conventionally, as a type of vibration isolation device such as an engine mount for a vehicle, a vibration isolation device with a bracket in which a vibration isolation device main body is assembled to a bracket from the side is known. Such a vibration isolation device main 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 side pairs of connecting portions provided on the second mounting member of the vibration isolation device main 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 main 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 main 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 the elastic deformation of the synthetic resin material, thereby proposing a mechanism for preventing the vibration isolation device from coming out of the bracket.

[0005] However, in the mechanisms described in Patent Documents 1 and 2, when the vibration isolation device main body is assembled to the bracket from the side, it is necessary for the engaging projection or the like of the second mounting member made of synthetic resin to elastically deform and engage 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 isolator 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 deterioration over time such as creep deformation may become a problem. Particularly in the case of an engine mount or the like 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 connection part of the vibration isolator body inserted into the connection groove part of the bracket is integrally provided in a state where a connection part main body integrally formed with the second attachment member and a biasing rubber are stacked one above the other. In the connection part of such a composite structure, when the vibration isolator body is assembled to the bracket from the side, since the biasing rubber actively elastically deforms, deformation of the connection part main body can be reduced or avoided, and damage during assembly can be prevented. Further, it becomes possible to make the second attachment member provided with the connection part main body made of metal, whereby the load-bearing performance and strength characteristics of the second attachment member and the connection part main body can be advantageously ensured, and deterioration over time such as creep deformation can also be avoided.

[0008] However, as a result of further examination by the present inventor, it became clear that there is still room for further improvement in the vibration isolator with a bracket disclosed in Patent Document 3. That is, in the vibration isolator with a bracket disclosed in Patent Document 3, when inserting the connection part into the connection groove part, the biasing rubber provided on one side in the vertical direction in the connection part is compressed and deformed, and the locking protrusion protruding on the other side in the vertical direction is overcome, thereby preventing the connection part from coming out of the connection groove part and being assembled. Therefore, in a state where the connection part is inserted to the deepest part with respect to the connection groove part and a large biasing force of the biasing rubber is applied, it was difficult to perform an operation for overcoming the locking protrusion and assembling the connection part.

[0009] In particular, in vibration isolation devices such as engine mounts, a liquid-sealed vibration isolation device that utilizes liquid flow is preferably employed, and it has a liquid chamber sealed by a sealing member that is overlapped and locked from below with a seal member sandwiched between it and a second attachment member. Therefore, when inserting the connecting portion into the connecting groove portion, as the connecting portion including the second attachment member tilts as it overrides the locking projection, the sealing member is likely to partially interfere with the bracket, and there is a risk that the liquid tightness by the seal member will be partially and temporarily impaired, and there is also a concern about the occurrence of liquid leakage when assembling the vibration isolation device body to the bracket.

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 portions and the like when assembling the vibration isolation device body to the bracket from the side, compared to those described in Patent Documents 1 and 2, and can also improve load-bearing characteristics and suppress deterioration over time. Also, compared to those described in Patent Document 3, by eliminating the need to override the locking projection protruding from the connecting groove portion, it is made easy to insert into the connecting groove portion while suppressing the inclination of the connecting portion, and it is possible to prevent liquid leakage and the like when assembling the vibration isolation device body to the bracket. An object of the present invention is to provide a liquid-sealed vibration isolation device with a bracket having a novel structure.

Means for Solving the Problems

[0012] The aspects of the present invention made to solve such problems will be described below. In each of the aspects described below, the components employed can be combined in any combination as much as possible.

[0013] The first aspect of the present invention is as follows. A vibration isolator 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 sealed by a liquid chamber that is overlapped and locked from below with a sealing member sandwiching a seal member with respect to the second mounting member. In a liquid-sealed vibration isolator with a bracket that is assembled laterally to the bracket, a pair of connecting portions provided on both sides of the second mounting member are inserted into a pair of connecting groove portions provided on the opposing inner surfaces of both side legs of the bracket. 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. Each of the connecting portions is provided with upper biasing rubber on the upper surface and the metal is exposed on the lower surface. The connecting portion is pressed against the lower surface of the groove in the connecting groove portion by a metal touch with an elastic reaction force in which the upper biasing rubber abuts against the upper surface of the groove in the connecting groove portion. An engaging convex portion that protrudes downward is provided at the inner end of the insertion direction of the connecting portion into the connecting groove portion on the lower surface of each of the connecting portions, and an engaging concave portion is provided at a position corresponding to the engaging convex portion on the lower surface of the groove in each of the connecting groove portions. A liquid-sealed vibration isolator with a bracket in which a retaining engagement portion that prevents the connecting portion inserted into the connecting groove portion from coming out is configured by a metal touch by the engaging convex portion of the connecting portion entering and engaging with the engaging concave portion of the connecting groove portion when the connecting portion is inserted into the connecting groove portion and the lower surface of the groove in the connecting groove portion is moved toward the inner side in the insertion direction.

[0014] In the liquid-sealed vibration isolator with a bracket according to this aspect, by making the second mounting member including the connecting portion made of metal, it is possible to prevent damage to the second mounting member including the connecting portion when assembling the vibration isolator main body to the bracket, and it is also possible to avoid problems such as looseness and strength reduction caused by aging deterioration such as creep deformation in the resin member. Moreover, in the downward (bounce direction) where the input load to the vibration isolator is likely to increase, since the connecting portion and the connecting groove portion are in metal touch contact, excellent load-bearing performance and positioning performance are likely to be exhibited. Further, even in the direction of the vibration isolator coming out of the bracket, since the connecting portion and the connecting groove portion are in metal touch contact at the extraction engaging portion, it is possible to obtain a highly reliable extraction resistance force.

[0015] Also, since the retaining engaging portion is provided at the inner end portion of the connecting portion and is constituted by the engaging convex portion and the engaging concave portion of the connecting groove portion, when inserting and assembling the connecting portion into the connecting groove portion, the engaging convex portion protruding downward from the connecting portion slides on the inner lower surface of the groove of the connecting groove portion and enters the engaging concave portion to be engaged. Therefore, it is not necessary to provide a locking convex portion or the like in the connecting groove portion, and it is not necessary to overcome the locking convex portion or the like when inserting and assembling the connecting portion into the connecting groove portion. Accordingly, it is possible to avoid the difficulty of assembling the connecting portion and the large inclination of the connecting portion caused by overcoming the locking convex portion or the like, and it becomes possible to easily insert the connecting portion into the connecting groove portion. Also, a temporary decrease in sealing performance caused by the second mounting member tilting greatly and the sealing member locally interfering with the bracket when overcoming the locking convex portion is avoided, and it is possible to prevent liquid leakage when assembling the vibration isolator main body to the bracket.

[0016] The second aspect of the present invention is as follows. In the bracket, A downward support portion is provided that abuts against the sealing member of the vibration isolator main body from below and supports the sealing member in a state where the sealing member is sandwiched between the second mounting member supported by the connecting groove portion of the bracket and the sealing member. The liquid-sealed vibration isolator with a bracket according to the first aspect.

[0017] In the liquid-sealed vibration isolator with brackets according to this aspect, when the connecting portion is inserted into the connecting groove portion for assembly, as the engaging convex portion of the connecting portion enters and engages with the engaging concave portion of the connecting groove portion, the connecting portion moves downward. By utilizing this, the sealing member can be more strongly clamped between the second mounting member having the connecting portion and the sealing member. As a result, in the vibration isolator main body, a higher level of liquid chamber sealing performance can be obtained in the assembled state with respect to the bracket than before assembly to the bracket.

[0018] The third aspect of the present invention is as follows. On the outer peripheral surfaces of the pair of connecting portions, outer peripheral biasing rubbers are respectively provided. Each of the outer peripheral biasing rubbers is in contact with the inner bottom surface of each groove of the pair of connecting groove portions. The liquid-sealed vibration isolator with brackets according to the first or second aspect.

[0019] In the liquid-sealed vibration isolator with brackets according to this aspect, in the facing direction of the pair of connecting groove portions, the pair of connecting portions can be press-fitted and positioned and supported with respect to the pair of connecting groove portions via the outer peripheral biasing rubbers. Therefore, by utilizing the elastic deformation of the outer peripheral biasing rubbers, it is possible to achieve both good assembly workability and positioning performance of the vibration isolator main body with respect to the bracket also in the facing direction of the pair of connecting groove portions.

[0020] The fourth aspect of the present invention is as follows. Both the left and right side portions of the second mounting member have flat lower surfaces, and on the outer peripheral edge portions of the lower surfaces of both the left and right side portions, concave surfaces linearly extending in the front-rear direction from the rear end portion in the insertion direction into the connecting groove portion toward the front are respectively formed. The pair of connecting portions are constituted by the left and right side portions where the respective concave surfaces are formed, and the concave surfaces are exposed surfaces of metal that are pressed against the inner lower surface of the groove of the connecting groove portion by metal touch. In the lower surfaces of both left and right side portions, the concave surface does not reach the front end portion, and the engaging convex portion is constituted by a portion where the concave surface is not formed in front of the concave surface, in any one of the first to third aspects of the bracket-equipped liquid-sealed vibration isolator.

[0021] In the bracket-equipped liquid-sealed vibration isolator of this aspect, by forming a pair of connecting portions with concave surfaces on both left and right side portions of the second mounting member, it becomes possible to form the engaging convex portion at the inner end portion with a lower surface connected to the lower surface of the second mounting member. Therefore, even when the engaging convex portion is small, it can be easily formed, and its strength can also be efficiently ensured.

[0022] The fifth aspect of the present invention is as follows. On the front end surface in the lateral assembly direction to the bracket in the second mounting member, a tip biasing rubber is provided and is in contact with the bracket in the assembly direction, in any one of the first to fourth aspects of the bracket-equipped liquid-sealed vibration isolator.

[0023] In the bracket-equipped liquid-sealed vibration isolator of this aspect, the biasing force by the tip biasing rubber is exerted in a direction opposite to the assembly direction to the bracket with respect to the vibration isolator main body, so that the abutting engagement state that prevents the disengagement from the connecting groove portion to the connecting portion is maintained at the anti-disengagement engaging portion, and the stabilization of the positioning state in the insertion direction of the connecting portion with respect to the connecting groove portion is achieved, which is also advantageous for preventing rattling and the like.

[0024] The sixth aspect of the present invention is as follows. On the upper surface of the groove inside 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 width from the inner side in the insertion direction of the connecting portion toward the opening side, in any one of the first to fifth aspects of the bracket-equipped liquid-sealed vibration isolator.

[0025] In the liquid-sealed vibration isolator with brackets according to this aspect, the insertion of the connecting portion into the connecting groove portion is facilitated by being guided by the guide taper. Thus, even when the biasing force of the upper 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 vibration isolator main body to the bracket, can be maintained well.

[0026] The seventh aspect of the present invention is as follows. The bracket includes a pair of support legs facing each other with a predetermined distance therebetween. The pair of connecting groove portions are provided on the inner surfaces facing each other of the pair of support legs, and an inner wall is provided between the pair of support legs on the side opposite to the side where the vibration isolator main body is assembled, The liquid-sealed vibration isolator with brackets according to any one of the first to sixth aspects, wherein the engaging recesses provided at the inner ends of the pair of connecting groove portions are formed in a form that penetrates the inner wall and extends to the inner side.

[0027] In the liquid-sealed vibration isolator with brackets according to this aspect, it is also possible to simplify the shape and structure of the engaging recess. Further, the mold material for forming the engaging recess can be inserted into the molding cavity through the inner wall of the bracket, and it is possible to simplify the mold structure of the bracket including the engaging recess.

Effects of the Invention

[0028] According to the present invention, it becomes possible to make the second attachment member including the connecting portion made of metal. Further, in the bounce direction and the extraction direction from the bracket of the vibration isolator main body, excellent load-bearing performance and reliability can be exhibited by the connecting portion being in metal touch with the bracket.

[0029] Moreover, since there is no need to provide a locking convex portion or the like in the connection groove portion at the retaining engagement portion, when inserting and assembling the connection portion into the connection groove portion, the problem of damage to the locking convex portion or the like is avoided, and the inclination of the connection portion caused by getting over the locking convex portion or the like is also avoided. Therefore, the operation of inserting and assembling the connection portion into the connection groove portion can be facilitated, and a temporary decrease in the sealing performance caused by the second attachment member formed with the connection portion being inclined and the sealing member locally interfering with the bracket can also be avoided, and leakage prevention can be achieved when assembling the vibration isolator main body to the bracket.

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

Figure 18

Mode 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 liquid-sealed 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 in which a mount body 12 as a vibration isolator main body is inserted laterally into a bracket 14 in a so-called lateral insertion manner. In the following description, in principle, the vertical direction refers to the vertical direction in FIG. 3 along the mount central axis. Also, in the engine mount 10 of the present embodiment, assuming that the vertical direction in FIG. 3 is the vertical up-and-down direction, the left-right direction in the same figure is the vehicle front-rear direction, and the direction perpendicular to the paper surface in the same figure is the vehicle left-right direction, and it is mounted between the vehicle body and the power unit of the automobile. However, for the sake of 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 same figure is referred to as the mount front-rear direction (or depth / front-rear 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 clearly show the presence or absence of compression in the assembled state to the bracket 14.

[0033] More specifically, as shown in a single-piece state in FIGS. 8-12 in addition to FIGS. 1-7, the mount body 12 has a structure in which a first mounting member 20 and a second mounting member 22 are elastically connected by a main body rubber elastic body 24. The support load and vibration of the power unit are input between the first mounting member 20 and the second mounting 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 inverted truncated cone shape. As illustrated in FIGS. 1-4, a mounting member 26 to be attached to a power unit or the like is fixed to the first mounting member 20 by 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 a steel material, and has a generally thick-walled annular block shape as a whole. In particular, in the present embodiment, as can be understood from FIG. 6, it has a rounded rectangular through-hole in the center and is generally in the shape of a thick-walled annular block of a rectangle.

[0036] The main body rubber elastic body 24 that elastically connects the first mounting member 20 and the second mounting member 22 has an outer peripheral surface shape in which the circumferential direction is substantially oval or rounded rectangular and the outer diameter dimension gradually decreases from bottom to top. The first mounting member 20 is fixedly inserted 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 fixed to the outer peripheral portion with a large diameter at the lower end. 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 the recess 28 opens downward through the through-hole of the second mounting member 22. 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-ring-shaped block shape corresponding to the second attachment member 22. Further, the sealing member 30 has a support bottom 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 32. Then, the flexible film 34 and the orifice member 36 are fixedly supported by being sandwiched vertically between the second attachment 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 attachment 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 attachment member 22. Also, 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. 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 in which pressure fluctuations are generated along with vibration input is formed. Below the orifice member 36, a part of the wall portion is constituted by a flexible film 34 such as a diaphragm rubber, thereby forming a volume-variable equilibrium chamber in which pressure fluctuations are absorbed.

[0041] These pressure receiving chambers and the balance chamber 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 is formed at the central portion of the orifice member 36 so as to extend in a direction orthogonal to the mount central axis and communicate with the pressure receiving chamber and the balance chamber respectively, and a movable membrane 48 is accommodated and arranged in such an accommodation region. Then, for example, when vibration is input in a high frequency range exceeding the tuning frequency of the orifice passage 46, the pressure fluctuation in the pressure receiving chamber is reduced or absorbed based on the deformation or displacement of the movable membrane 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 membrane 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 either, 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 project 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. A locking hole 53 extending vertically is formed in the locking piece 52, and by hooking the locking claw 50 to this locking hole 53, the sealing member 30 is assembled and fixed to the second mounting member 22. The locking hole 53 of the locking piece 52 and the locking claw 50 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 sealing member 30, one locking piece 52 is formed in a plate shape at each part extending substantially linearly on both sides in the front-rear direction, and two locking holes 53, 53 are formed in the locking piece 52 at intervals in the circumferential direction. And locking claws 50 are formed at positions corresponding to these respective locking holes 53, and a total of 4 pairs of locking holes 53 and locking claws 50 are provided in the entire circumferential direction.

[0044] Note that the operation of hooking each locking claw 50 into each locking hole 53 can be performed substantially simultaneously by utilizing the elastic deformation and restoration of each locking piece 52 by overlapping the upper surface of the sealing member 30 from below with respect to the lower surface of the second mounting member 22 while pressing the rubber seal 38 and approaching them.

[0045] Furthermore, on the outer peripheral portions on both 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 that extend linearly in the front-rear direction with a substantially constant thickness are provided respectively. And 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, and as shown in FIGS. 13 - 15 in addition to FIGS. 1 - 7, it integrally includes left and right mounting leg portions 60, 60 that rise upward respectively 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 of the opening to the side), a back wall 68 is integrally provided so as to close the opening of the assembly space 66, and on the upper side 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 spread outward from each mounting leg portion 60, and in such a pair of fixed plate portions, the bracket 14 is bolt-fixed 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 these 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 these pair of connecting groove portions 72, 72 from the side, and as shown in FIGS. 16 - 18 in sequence of the assembly process, the mount body 12 is horizontally inserted into the bracket 14 and assembled.

[0050] In this assembled state, the bottom wall lower surface of the sealing member 30 of the mount body 12 is overlapped and supported in contact with the upper surface of the base portion 58 of the bracket 14. That is, in the present embodiment, a lower support portion that supports the sealing member 30 from below by the base portion 58 of the bracket 14 is configured, and the second attachment member 22 and the sealing member 30 of the mount body 12 are positioned and held with respect to each other in the mount axis direction by the connecting groove portions 72, 72 and the base portion 58 of the bracket. In short, in the single-piece state of the mount body 12 before being assembled to the bracket 14, the second attachment member 22 and the sealing member 30 are in a so-called temporarily fixed state by the locking mechanism of the locking claw 50 and the locking piece 52, and the second attachment member 22 and the sealing member 30 are firmly positioned with respect to each other in a fixed state by being assembled to the bracket 14.

[0051] Here, so that the 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 in the state of the mount body 12 being assembled to the bracket 14, each pair of connecting portions 54, 54 and connecting groove portions 72, 72 has a special configuration.

[0052] Specifically, a pair of connecting portions 54, 54 of the second mounting member 22 are provided on both left and right side portions of the second mounting member 22 such that an intermediate portion in the front-rear direction projects outward on the outer peripheral side with a predetermined length. The second mounting member 22 has a flat surface on its lower surface that is perpendicular to the mounting central axis, at least in the projecting portions on the outer peripheral sides of both the left and right sides. In particular, in the present embodiment, the lower surface of the second mounting member 22 is a flat surface over its entire length.

[0053] Further, in the projecting portions on the outer peripheral sides of both the left and right sides of the second mounting member 22, concave surfaces 74, 74 that linearly extend in the front-rear direction are formed at the outer peripheral edge portions, extending from the front side end (rear end) in the insertion direction into the connecting groove portions 72, 72 toward the back side (front). The second mounting member 22 made of metal is exposed on the concave surfaces 74, 74 that are the lower surfaces of the pair of connecting portions 54, 54, and together with the inner groove lower surfaces 76, 76 of the corresponding connecting groove portions 72, 72, it extends linearly with a substantially constant width in the front-rear direction with a substantially horizontal and flat metal surface.

[0054] Note that the upper surfaces 78, 78 of the pair of connecting portions 54, 54 and the inner groove upper surfaces 80, 80 of the pair of connecting groove portions 72, 72 may also be flat surfaces that extend horizontally in the front-rear direction. However, in the present embodiment, the upper surfaces 78, 78 of the pair of connecting portions 54, 54 and the inner groove upper surfaces 80, 80 of the pair of connecting groove portions 72, 72 are inclined surfaces that gradually incline upward from the back side (front) toward the front side (rear). This improves the workability of inserting the connecting portions 54, 54 into the connecting groove portions 72, 72 and enhances the efficiency of the compression action on the upper biasing rubbers 82, 82 described below. In particular, in the present embodiment, the inclination angles of the inner groove upper surfaces 80, 80 of the pair of connecting groove portions 72, 72 are made larger near the front side (rear) end to further facilitate the insertion of the connecting portions 54, 54.

[0055] 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 in the normal assembled state of the mounting body 12 with respect to the bracket 14. Further, upper biasing rubbers 82, 82 are provided on the upper surfaces 78, 78 of the pair of connecting portions 54, 54, respectively.

[0056] The thickness dimension of this upper biasing rubber 82 (the protruding height dimension upward from the connecting portion 54) is substantially constant throughout, and 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. Thereby, the second attachment member 22 assembled to the bracket 14 by inserting the pair of connecting portions 54, 54 into the pair of connecting groove portions 72, 72 is in contact with the upper surfaces 80, 80 within the grooves of the connecting groove portions 72, 72 and is compressed. Due to the repulsive elastic force of the upper biasing rubbers 82, 82, the lower surfaces (concave 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 a metal touch and are positioned.

[0057] Furthermore, on the lower surfaces 74, 74 within the grooves of the connecting groove portions 72, 72 in the bracket 14, lower step surfaces 84a are provided, each being located slightly forward of the back wall surface 83 (see FIG. 16(d)) at the inner end of the connecting groove portion 72 on the inner side. And the portion on the inner side of this lower step surface 84a is an engaging concave portion 84b that extends deeper beyond the position of the back wall surface 83. Particularly in this embodiment, such an engaging concave portion 84b is a knockout hole that extends substantially linearly in the inner direction of the bracket 14 and penetrates the back wall 68 of the bracket 14. That is, by means of a split mold inserted into the molding cavity of the bracket 14 through such a knockout hole, the engaging concave portion 84b having the lower step surface 84a can be molded simultaneously with the formation of the bracket 14.

[0058] On the other hand, at the inner ends of the connecting portions 54, 54 in the second mounting member 22, engaging convex portions 86 that protrude downward from the concave surfaces 74, 74 are integrally formed because the concave surfaces 74, 74 do not reach the inner ends of the connecting portions 54, 54. In a state where the second mounting member 22 is assembled to the bracket 14, the pair of engaging convex portions 86, 86 enter the pair of engaging concave portions 84b, 84b respectively, and the front side surfaces of the engaging convex portions 86 are in metal contact with the lower step surfaces 84a to form an engaging state, thereby constituting a retaining engaging portion. That is, due to the engaging action of the metal surfaces of the engaging convex portions 86, 86 and the engaging concave portions 84b, 84b in metal contact, the pair of connecting portions 54, 54 of the second mounting member 22 are held in an inserted state with respect to the pair of connecting groove portions 72, 72 of the bracket 14, preventing them from coming out. The engaging convex portions 86, 86 that enter downward into the engaging concave portions 84b, 84b are suppressed from moving upward by the repulsive elastic force of the compressed upper biasing rubbers 82, 82 acting on the connecting portions 54, 54, so that the engaging state of the engaging convex portions 86, 86 and the engaging concave portions 84b, 84b is maintained.

[0059] Also, the outer peripheral surfaces 87, 87 of the pair of connecting portions 54, 54 extend parallel to each other in the front-rear direction with a constant width in the vertical direction. For example, as an inclined surface where 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), the workability of inserting into the connecting groove portions 72, 72 may be improved. In that case, it is desirable that the groove inner bottom surfaces 88, 88 of the connecting groove portions 72, 72 also be corresponding inclined surfaces.

[0060] Furthermore, the left - right separation dimension between the outer peripheral surfaces 87, 87 of such a pair of connecting portions 54, 54, that is, the member outer dimension in the left - right direction of the second attachment member 22 at the formation site of the connecting portions 54, 54, is slightly smaller than the opposing distance between the groove inner bottom surfaces 88, 88 of the pair of connecting groove portions 72, 72, as can be understood from FIG. 6 and the like. Also, outer peripheral biasing rubbers 90, 90 are provided over substantially the entire outer peripheral surfaces 87, 87 of the pair of connecting portions 54, 54. The total value of the thickness dimensions (the protruding height dimensions from the connecting portion 54 to the side) of these left - right outer peripheral biasing rubbers 90, 90 is larger than the difference between the left - right separation dimension between the outer peripheral surfaces 87, 87 of the pair of connecting portions 54, 54 and the opposing distance between the groove inner bottom surfaces 88, 88 of the pair of connecting groove portions 72, 72.

[0061] As a result, when the pair of connecting portions 54, 54 are inserted into the pair of connecting groove portions 72, 72 and assembled to the second attachment member 22 assembled to the bracket 14, the repulsive elastic forces of the outer peripheral biasing rubbers 90, 90 that are in contact with and compressed against the groove inner bottom surfaces 88, 88 of the connecting groove portions 72, 72 on the outer peripheral sides of both the left - right connecting portions 54, 54 act thereon. And, due to the balance of the repulsive elastic forces of these outer peripheral biasing rubbers 90, 90, the second attachment member 22 is held and positioned at substantially the center between the left - right attachment leg portions 60, 60.

[0062] Furthermore, in the present embodiment, tip biasing rubbers 92, 92 that protrude toward the outer periphery (the back in the insertion direction into the connecting groove portions 72, 72) are provided on the tip end surfaces in the assembling direction of the second attachment member 22 (connecting portions 54, 54) with respect to the bracket 14. And, as shown in the assembled state of FIG. 7, such tip biasing rubbers 92, 92 are in contact with and pressed against the back wall surfaces 83, 83 formed by the back wall 68 of the bracket 14. As a result, the repulsive elastic force of the tip biasing rubbers 92, 92 acts on the connecting portions 54, 54 so as to press the rear surfaces of the engaging convex portions 86, 86 against the lower step surfaces 84a, 84a of the connecting groove portions 72, 72. Thereby, the engaging convex portions 86, 86 of the connecting portions 54, 54 are held in contact with the lower step surfaces 84a, 84a of the connecting groove portions 72, 72, and rattling and the like are prevented.

[0063] Incidentally, 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 pressing them in until the second attachment member 22 reaches a position where it is substantially accommodated in the bracket 14, as shown in FIGS. 16 - 18.

[0064] First, as shown in FIG. 16, 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 attachment member 22 into the pair of connecting groove portions 72, 72 of the bracket 14 from the front - side opening. At this time, the upper inner surface 80 of the groove in each connecting groove portion 72 is inclined upward gradually from the back side to the front side, and particularly the inclination angle is larger near the front - side end (see FIGS. 7, 16(d), etc.). Thus, the upper biasing rubbers 82, 82 are prevented from being caught, and the insertion of the connecting portions 54, 54 into the connecting groove portions 72, 72 is facilitated. The outer - periphery biasing rubber 90 and the upper biasing rubbers 82, 82 can be made into a tapered shape with a smaller rubber - thickness dimension at the front - side end in the insertion direction and gradually becoming thicker toward the rear - side in the insertion direction, so as to further facilitate the insertion of the connecting portions 54, 54 into the connecting groove portions 72, 72.

[0065] Furthermore, as shown in FIG. 17, the pair of connecting portions 54, 54 inserted into the pair of connecting groove portions 72, 72 of the bracket 14 are pushed deeper. At this time, at the tip portion in the insertion direction of each connecting portion 54, 54, the lower surface of the engaging convex portions 86, 86 is superposed on the inner lower surfaces 76, 76 of the grooves in the connecting groove portions 72, 72 in a metal - touch manner and is guided to slide on the flat inner lower surfaces 76, 76 and move deeper.

[0066] In addition, in the connecting portions 54, 54 of the second attachment member 22, the concave surfaces 74, 74 located on the front side in the insertion direction with respect to the engaging convex portions 86, 86, for example, by applying an upward pushing force together with a pushing force to the front end portion of the second attachment member 22, as shown in FIGS. 16(d) and 17(d), it is desirable to keep the connecting portions 54, 54 in a substantially horizontal state with a state slightly floating upward from the inner lower surfaces 76, 76 of the connecting grooves 72, 72 of the bracket 14. However, since the engaging convex portions 86, 86 of the connecting portions 54, 54 are located at the tips, even if the upward pushing force applied to the rear end of the second attachment member 22 (connecting portions 54, 54) is small, a moment force that turns the connecting portions 54, 54 upward around the engaging convex portions 86, 86 is efficiently applied, and it becomes easy to keep the connecting portions 54, 54 in a substantially horizontal state.

[0067] Particularly in this embodiment, the inner upper surfaces 80, 80 of the pair of connecting grooves 72, 72 are inclined downward toward the back, and further, the inclination angle is made even larger near the rear end portions of the inner upper surfaces 80, 80. Therefore, in the process of inserting the connecting portions 54, 54 into the connecting grooves 72, 72, the downward pressing force exerted on the connecting portions 54, 54 by the repulsive elasticity of the upper biasing rubbers 82, 82 is large at the front end side but hardly occurs at the rear end side. Therefore, the moment force (clockwise moment force in FIGS. 16(d) and 17(d)) in the direction of pushing down the connecting portions 54, 54 around the tips of the engaging convex portions 86, 86 can be suppressed to be small.

[0068] Furthermore, in the present embodiment, the upper biasing rubbers 82, 82 of the connecting portions 54, 54 continuously protrude to the tip side beyond the tip surfaces of the connecting portions 54, 54 and are connected to the tip biasing rubber 92 provided on the tip surfaces of the connecting portions 54, 54. Then, in the process of inserting the connecting portions 54, 54 into the connecting groove portions 72, 72, a moment force (a counterclockwise moment force in FIGS. 16(d) and 17(d)) in the direction of pushing the connecting portions 54, 54 upward around the tips of the engaging convex portions 86, 86 is generated by the repulsive elasticity due to the portions of the upper biasing rubbers 82, 82 protruding to the tip side beyond the connecting portions 54, 54 abutting against the upper inner surfaces 80, 80 of the grooves of the connecting groove portions 72, 72. As a result, a moment force (a clockwise moment force in FIGS. 16(d) and 17(d)) in the direction of pushing the connecting portions 54, 54 downward around the tips of the engaging convex portions 86, 86 can be suppressed to be smaller by the repulsive elasticity of the upper biasing rubbers 82, 82 provided on the upper surfaces of the connecting portions 54, 54, and it can be made easier to keep the connecting portions 54, 54 in a substantially horizontal state.

[0069] Then, as shown in FIG. 18, when the pair of connecting portions 54, 54 are pushed to the innermost side along the pair of connecting groove portions 72, 72 of the bracket 14, the engaging convex portions 86, 86 formed at the tips of the pair of connecting portions 54, 54 reach the engaging concave portions 84b formed in the pair of connecting groove portions 72, 72, so that the engaging convex portions 86, 86 come off from the tips of the lower inner surfaces 76, 76 of the grooves and fall into the engaging concave portions 84b, and the entire second attachment member 22 including the connecting portions 54, 54 moves downward by the amount of the protrusion height downward of the stepped convex portions 86, 86.

[0070] As a result, the assembled state as shown in FIGS. 1 - 7 can be realized as described above, and the lower surfaces (concave surfaces) 74, 74 of the pair of connecting portions 54, 54 are brought into metal touch contact with the lower inner surfaces 76, 76 of the pair of connecting groove portions 72, 72 and held in a pressed state, and the rear surfaces of the engaging convex portions 86, 86 of the pair of connecting portions 54, 54 are brought into metal touch contact with the lower stepped surfaces 84a, 84a of the pair of connecting groove portions 72, 72 and held in a pressed state.

[0071] And as is clear from the above description, in such an assembled state, since the second mounting member 22 is positioned in the vertical direction and in the front-rear direction in a metal touch manner with respect to the bracket 14, it is possible to position and support the second mounting member 22 with respect to the bracket 14 with high precision and a large load-bearing performance.

[0072] Further, when the second mounting member 22 is assembled to the bracket 14, the engaging convex portions 86, 86 of the pair of connecting portions 54, 54 are guided to slide on the flat groove 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, it is possible to eliminate the movement of overcoming protrusions or the like at the pair of connecting portions 54, 54 during the assembling operation, without requiring a difficult operation necessary for overcoming protrusions or the like, and also avoiding a temporarily large inclination of the second mounting member 22 with respect to the bracket 14 due to overcoming protrusions or the like. Therefore, the second mounting member 22 can be easily assembled to the bracket 14, and for example, when the second mounting member 22 is assembled to the bracket 14, the entire mount body 12 is tilted, and the sealing member 30 hooked and engaged with the second mounting member 22 is locally and strongly abutted against the base portion 58 of the bracket 14. 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.

[0073] Moreover, in the present embodiment, since the lower step surface 84a of the connecting groove portion 72 constituting the retaining engagement portion in the bracket 14 is formed at the end of the connecting groove portion 72 in the insertion direction of the connecting portion 54, the length of the engaging concave portion 84b as a split-type die punching hole inserted through the back wall 68 of the bracket 14, and thus the length of the split type can be shortened, and the member strength and durability of the split type can be advantageously ensured. At the same time, it is possible to easily and stably form the bracket 14 provided with the engaging concave portion 84b including the lower step surface 84a.

[0074] As described in detail above, the embodiments of the present invention have been described in detail, but the present invention is not limited by its specific description. For example, the upper biasing rubber 82, the outer peripheral biasing rubber 90, the tip biasing rubber 92, etc. may be integrally formed with the main body rubber elastic body 24 or may be separately formed. Further, the upper and lower biasing rubber 82, the outer peripheral biasing rubber 90, the tip biasing rubber 112, etc. may be integrally formed with each other or may be separately formed.

[0075] The specific structure of the bracket shown in the above embodiment is merely an example, and as long as it has a connecting groove portion, the mounting 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.

[0076] Further, the assembling method by laterally inserting the bracket 14 into the mount body 12 is not limitedly interpreted by the foregoing exemplary description. For example, in the insertion process as shown in FIG. 17(b), with respect to the gap between the concave surface 74 of the connecting portion 54 and the lower surface 76 of the groove in the connecting groove portion 72, a spacer member is inserted from the front side in the insertion direction (the right side in FIG. 17(b)) to lift the front side portion of the connecting portion 54 upward, and the connecting portion 54 may be pushed inward while keeping it in a substantially horizontal state.

[0077] Furthermore, in the above embodiment, an example of applying the present invention to an engine mount is shown, but the present invention is not limited to the engine mount and can be applied to various liquid-sealed vibration isolators such as body mounts and cab mounts.

Explanation of reference numerals

[0078] 10 Engine mount 12 Mount body 14 Bracket 20 First mounting member 22 Second mounting member 24 Main body rubber elastic body 26 Mounting member 28 Recess (main body rubber elastic body) 30 Sealing member 32 Support bottom (sealing member) 34 Flexible film 36 Orifice member 38 Sealing rubber (lower surface of the second mounting member) 40 Liquid chamber 46 Orifice passage 48 Movable film 50 Locking claw 52 Locking piece 53 Locking hole 54 Connecting part (second mounting member) 58 Base part 60 Mounting leg 62 Top plate part 66 Assembly space 68 Rear wall 70 Insertion hole 72 Connecting groove part 74 Concave surface (lower surface) 76 Inner bottom surface of groove (connecting groove part) 78 Upper surface (connecting part) 80 Inner upper surface of groove (connecting groove part) 82 Upper biasing rubber 83 Rear wall surface 84a Lower step surface 84b Engaging recess 86 Engaging convex part (connecting part) 87 Outer peripheral surface (connecting part) 88 Inner bottom surface of groove (connecting groove part) 90 Outer peripheral biasing rubber 92 Tip biasing rubber

Claims

1. In a liquid-sealed vibration isolator with a bracket, a vibration isolator body in which an upper and a lower spaced-apart first mounting member and a second mounting member are elastically connected by a main body rubber elastic body is sealed by a sealing member that is overlapped and locked from below with a seal member interposed between the sealing member and the second mounting member. A pair of connecting portions provided on both sides of the second mounting member are inserted into a pair of connecting groove portions provided on the opposing inner surfaces of both side legs of the bracket, whereby the liquid-sealed vibration isolator with a bracket is assembled laterally to the bracket. 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. Each of the connecting portions is provided with an upper biasing rubber on the upper surface and has the metal exposed on the lower surface. The upper biasing rubber presses the connecting portion against the lower inner surface of the groove of the connecting groove portion by an elastic reaction force that contacts the upper inner surface of the groove of the connecting groove portion. On the lower surface of each of the connecting portions, an engaging convex portion that protrudes downward is provided at the rear end in the insertion direction into the connecting groove portion. On the lower inner surface of each of the connecting groove portions, an engaging concave portion is provided at a position corresponding to the engaging convex portion. A retaining engagement portion that prevents the connecting portion inserted into the connecting groove portion from coming out is formed by metal touch, by the engaging convex portion of the connecting portion inserted into the connecting groove portion and moving the lower inner surface of the connecting groove portion toward the rear in the insertion direction and engaging with the engaging concave portion of the connecting groove portion.

2. The bracket is provided with a lower support portion that abuts against the sealing member of the vibration isolator body from below and supports the sealing member in a state where the seal member is sandwiched between the second mounting member supported by the connecting groove portion of the bracket and the sealing member. The liquid-sealed vibration isolator with a bracket according to claim 1.

3. Each of the pair of connecting portions is provided with an outer peripheral biasing rubber on the outer peripheral surface. Each of the outer peripheral biasing rubbers is in contact with the bottom surface of each of the pair of connecting groove portions. The liquid-sealed vibration isolator with a bracket according to claim 1 or 2.

4. Both the left and right side portions of the second mounting member have a flat lower surface, and on the outer peripheral edge portions of each of the lower surfaces of the left and right side portions, concave surfaces that linearly extend in the front-rear direction from the rear end in the insertion direction into the connecting groove portion toward the front are formed. A pair of connecting portions are formed by the left and right side portions each having the concave surface, and the concave surface is an exposed surface of metal that is pressed against the inner bottom surface of the groove of the connecting groove portion by metal touch, and On each of the lower surfaces of the left and right side portions, the concave surface does not reach the front end portion, and the engaging convex portion is configured by a portion where the concave surface is not formed in front of the concave surface. The liquid-sealed vibration isolator with a bracket according to any one of claims 1 to 3.

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

6. On the inner upper surface of the connecting groove portion, at least at 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 width from the inner side in the insertion direction of the connecting portion toward the opening side. The liquid-sealed vibration isolator with a bracket according to any one of claims 1 to 5.

7. The bracket includes a pair of support legs that face each other at a predetermined distance, The pair of connecting groove portions are provided on the inner opposing surfaces of the pair of support legs, and An inner wall is provided between the pair of support legs on the side opposite to the side where the vibration isolator main body is assembled, The engaging concave portions provided at the inner ends of the pair of connecting groove portions are formed in a form that penetrates the inner wall and extends to the inner side. The liquid-sealed vibration isolator with a bracket according to any one of claims 1 to 6.

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