JP6644645B2 - Anti-vibration device with bracket - Google Patents

Description

  The present invention relates to an anti-vibration device with a bracket used for an engine mount of an automobile and the like.

  BACKGROUND ART Conventionally, an anti-vibration device is known as a type of an anti-vibration support or an anti-vibration coupling body that is disposed between members that constitute a vibration transmission system and that connects the components of the vibration transmission system with each other. For example, it is applied to an engine mount of an automobile. As disclosed in, for example, Japanese Patent No. 5083405 (Patent Document 1) and the like, this vibration damping device is configured such that a second strength member and a first strength member that are vertically separated from each other are elastically connected to each other by an elastomer body. Element.

  Patent Literature 1 discloses an anti-vibration device with a bracket in which a support is mounted on an anti-vibration element. The support has a sliding portion extending in the lateral direction, and ribs provided on the first strength member are inserted and guided in the sliding portion, and the first strength member is inserted in the transverse direction with respect to the support. By being fixed, the support is attached to the vibration isolating element.

  By the way, in the vibration isolator of Patent Literature 1, a snap fitting protrusion provided on a rib of the vibration isolating element is inserted into a notch provided on a sliding portion of the support to elastically engage with the snap fitting. In addition, the anti-vibration element is prevented from coming off the support.

  However, in the retaining structure using the snap fitting disclosed in Patent Document 1, at least one of the rib having the snap fitting protrusion and the sliding portion having the notch is elastically deformed when the vibration isolating element and the support are assembled. It is necessary, and damage at the time of deformation becomes a problem. In particular, if at least one of the ribs and the sliding part is made of synthetic resin in order to reduce weight and improve formability, damage to the vibration isolating element and the support caused by elastic deformation when the support is mounted is a problem. And the anti-vibration element may separate from the support due to deterioration over time. On the other hand, if it is attempted to form a snap fitting protrusion and a notch that can be elastically deformed with respect to a metal rib and a sliding portion, it becomes difficult to manufacture the rib and the sliding portion by molding, and the snap fitting protrusion is formed. Post-processing for forming a notch is required.

  Further, since the vibration isolating element and the support are positioned relative to each other by inserting the rigid ribs into the rigid sliding portion from the lateral direction, the support including the sliding portion is made of synthetic resin. If it is formed of a material whose dimensions can be changed due to aging, a gap may be formed between the vibration isolating element and the support, and there may be a possibility of generating abnormal noise due to rattling.

Japanese Patent No. 5083405

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a problem to be solved is to stably hold a bracket in an appropriate mounting state with respect to a vibration isolator main body by a simple structure that is easy to manufacture. It is an object of the present invention to provide a vibration isolator with a bracket having a novel structure.

  Hereinafter, embodiments of the present invention made to solve such problems will be described. The components employed in each of the embodiments described below can be employed in any combination as possible.

  That is, the first embodiment of the present invention includes the vibration isolator main body having a structure in which the first mounting member and the second mounting member vertically separated from each other are elastically connected to each other by the main rubber elastic body. In addition, in the vibration isolator with a bracket in which the vibration isolator main body is laterally inserted into the bracket, an insertion connecting portion is provided on the second mounting member of the vibration isolator main body, and A first vertical biasing rubber is fixed to one of the upper and lower outer surfaces, and a second vertical biasing rubber is fixed to the other upper or lower outer surface of the insertion connecting portion, while the bracket is fixed to the bracket. A connecting groove extending in a direction in which the vibration isolator main body is inserted into the bracket, a lock protrusion is formed on one of upper and lower inner surfaces of the connection groove, and a protrusion dimension of the lock protrusion is provided. Is the first vertical bias And the insertion connection portion, which is laterally inserted into the connection groove portion over the lock protrusion, is smaller than the total thickness of the upper and lower thicknesses of the first and second upper and lower urging rubbers. The upper and lower urging rubber and the second upper and lower urging rubber are positioned relative to each other in the up and down direction with respect to the connection groove portion, and are urged upward or downward by the first upper and lower urging rubber. Withdrawal is prevented by locking to the lock projection.

  According to the anti-vibration device with a bracket having the structure according to the first aspect, in the structure in which the anti-vibration device main body is inserted into the bracket in the horizontal direction, the insertion connection portion of the anti-vibration device main body has a lock protrusion. When the first up-and-down urging rubber and the second up-and-down urging rubber are elastically deformed when being inserted into the connection groove portion of the bracket after getting over, the deformation of the insertion connection portion and the connection groove portion becomes unnecessary. Accordingly, when the insertion connection portion is inserted into the connection groove portion, the insertion connection portion and the connection groove portion are prevented from being damaged, and the durability is improved.

  In addition, the insertion connecting portion that is inserted into the connecting groove portion over the locking protrusion is urged to the other side by the elasticity of the first vertical urging rubber compressed between the upper and lower portions of the inserting connecting portion and the connecting groove portion. Therefore, the displacement of the insertion connection portion in the withdrawing direction with respect to the connection groove portion is limited by the engagement between the insertion connection portion and the lock protrusion. Thereby, separation of the vibration isolator main body and the bracket due to the insertion connecting portion falling out of the connecting groove portion is prevented, and reliability is improved.

  Further, since the second upper / lower urging rubber is fixed to the lower surface of the insertion connecting portion, the second upper / lower urging rubber is located on the lock protrusion when the insertion connecting portion gets over the lock protrusion. Since the portion is largely compressed and deformed at the portion, and the resistance of the insertion connecting portion to the connecting groove portion is reduced, the assembling work of the vibration isolator main body and the bracket becomes easy.

  In addition, since the upper and lower surfaces of the insertion connecting portion are covered with the first vertical urging rubber and the second vertical urging rubber, when the insertion connecting portion gets over the lock projection and is inserted into the connection groove portion. In addition, damage due to direct contact between the upper and lower outer surfaces of the insertion connecting portion and the upper and lower inner surfaces of the connecting groove, and difficulty in insertion due to galling are avoided.

  According to a second aspect of the present invention, in the vibration damping device with a bracket according to the first aspect, the first vertical urging rubber is thicker in the vertical direction than the second vertical urging rubber. Is what it is.

  According to the second aspect, when the insertion connecting portion gets over the lock projection, the vertical compression deformation amount of the first vertical urging rubber is set to be larger than the vertical compression deformation amount of the second vertical urging rubber. This makes it easier to displace the insertion connecting portion that is inserted into the connecting groove portion over the lock protrusion in the vertical direction toward the second vertically biasing rubber side as compared with when the lock connection portion crosses the lock protrusion. With this, in the front-rear projection in the insertion direction, the insertion connecting portion that has climbed over the lock protrusion is more likely to overlap with the lock protrusion with a larger area, and the insertion connection portion and the lock protrusion prevent the insertion connection portion from being locked. The detachment from the connecting groove can be prevented.

  In particular, the first vertically biased rubber and the second vertically biased rubber are made of a rubber material having the same spring characteristics, such that the first vertically biased rubber and the second vertically biased rubber are integrally formed with each other. In the case of being formed with, for example, by making the thickness of the first vertical urging rubber and the second vertical urging rubber different from each other, the vertical position of the insertion connecting portion inserted in the connecting groove portion can be easily adjusted. Can be adjusted.

  According to a third aspect of the present invention, in the vibration damping device with a bracket according to the second aspect, the first vertical urging rubber is fixed to an upper surface of the insertion connection portion, and the second Up and down urging rubber is fixed to the lower surface of the insertion connecting portion.

  According to the third aspect, for example, when a downward shared supporting load is input to the vibration isolator main body from a component of the vibration transmission system or the like, the second vertical urging rubber having a small vertical thickness is used. The shared support load can be stably received. Further, the amount of deformation of the second vertical urging rubber due to the action of the shared supporting load is made relatively small, so that the durability of the second vertical urging rubber can be improved, and the second vertical urging rubber can be improved. It is also easy to prevent rattling of the vibration isolator main body and the housing due to rubber settling.

  According to a fourth aspect of the present invention, in the anti-vibration device with a bracket according to any one of the first to third aspects, the projection end surface of the lock projection is inclined with respect to the insertion direction. The protrusion dimension of the lock protrusion is reduced toward the rear in the insertion direction.

  According to the fourth aspect, the vertical dimension of the rear surface of the lock protrusion is reduced, so that the insertion connecting portion can easily pass over the lock protrusion in the insertion direction. In addition, the vertical dimension of the front surface of the lock projection is increased, so that the insertion connection portion that has passed over the lock projection and the lock projection can be effectively prevented from being pulled out, and the insertion connection portion is locked. It is possible to prevent the protrusion from climbing over in the pull-out direction.

  According to a fifth aspect of the present invention, in the vibration damping device with a bracket according to any one of the first to fourth aspects, a front-rear biasing rubber is fixed to a front surface of the insertion connecting portion in the insertion direction. A front wall portion closing the front end of the connection groove in the insertion direction is provided on the bracket, and the front-rear biasing rubber is compressed back and forth in the insertion direction between the insertion connection portion and the front wall portion. It is.

  According to the fifth aspect, since the insertion connecting portion is urged in the extraction direction (rear in the insertion direction) by the elasticity of the urging rubber compressed in the front and rear directions of the insertion direction, the insertion connecting portion is formed in the connection groove portion. It is pressed against the lock projection in the pull-out direction. Thus, the insertion connection portion is positioned in the connection groove portion before and after in the insertion direction, and the generation of abnormal noise caused by the insertion connection portion and the lock projection coming into contact with each other from a distance is also avoided.

  According to the present invention, since one of the first and second upper and lower urging rubbers is fixed to both the upper and lower surfaces of the insertion connection portion of the vibration isolator main body, the insertion connection portion rides over the lock projection and the housing. When the first and second upper and lower urging rubbers are elastically deformed when they are inserted into the connecting groove portion, the insertion connecting portion and the connecting groove portion are not required to be deformed, and the durability is improved. In addition, the insertion connecting portion which has been inserted into the connecting groove portion over the lock protrusion is positioned in the vertical direction with respect to the connecting groove portion by the elasticity of the first and second vertical urging rubbers, and the first connecting portion is provided. It is urged by the urging rubber, and the displacement with respect to the connecting groove in the pull-out direction is restricted by the engagement with the lock projection.

FIG. 1 is a rear view showing an engine mount according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the engine mount shown in FIG. 1. FIG. 3 is an enlarged vertical sectional view of a mount main body constituting the engine mount shown in FIG. 1, and is a sectional view taken along line III-III of FIG. 4. IV-IV sectional drawing of FIG. FIG. 4 is a perspective view of an integrally vulcanized molded product constituting the mount main body shown in FIG. 3. FIG. 2 is a perspective view of a bracket constituting the engine mount shown in FIG. 1. VII-VII sectional drawing of FIG. VIII-VIII sectional drawing of FIG. The principal part enlarged view which shows the A section of FIG. The principal part enlarged view which shows the B section of FIG.

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

  FIGS. 1 and 2 show an engine mount 10 for an automobile as a first embodiment of a vibration isolator with a bracket having a structure according to the present invention. The engine mount 10 has a structure in which a mount body 12 as a vibration isolator body is inserted into a bracket 14 in a lateral direction and mounted. In the following description, in principle, the vertical direction is the vertical direction in FIG. 1 which is the direction of the center axis of the mount, the front-rear direction is the direction perpendicular to the plane of FIG. 1, and the horizontal direction is the horizontal direction in FIG. , Say each.

  More specifically, as shown in FIGS. 3 and 4, the mount body 12 has a structure in which an integrally vulcanized molded product 16 and a liquid seal assembly 18 are combined. The integrally vulcanized molded product 16 has a structure in which a first mounting member 20 and a second mounting member 22 are elastically connected by a main rubber elastic body 24.

  The first attachment member 20 is a high-rigidity member formed of metal, synthetic resin, or the like, and has a solid three-dimensional shape such as an inverted conical shape, a truncated conical shape, or a cylindrical shape. At the same time, a mounting piece 26 having a bolt hole protruding upward and penetrating back and forth is integrally formed.

  The second mounting member 22 is a highly rigid member formed of metal, synthetic resin, or the like, and has a substantially square tubular shape as a whole. Further, the second mounting member 22 is integrally formed with a seal projection 28 projecting inward. The upper surface of the seal projection 28 has a tapered shape, and the lower surface extends in a direction substantially perpendicular to the axis. ing.

  In addition, engagement portions 30 protruding downward are formed on left and right sides of the second attachment member 22, respectively. As shown in FIG. 5, the engaging portion 30 is formed at a position deviated forward, and the rear end (the lower end in FIG. 2) of the engaging portion 30 is higher than the rear end of the second mounting member 22. Is also located on the front side (the upper end in FIG. 2). Outer grooves 32 are formed in the engaging portions 30, 30 of the second mounting member 22 so as to open inward in the facing direction and extend in the front-rear direction. The engaging portions 30, 30 of the present embodiment are reinforced by their front ends being connected to each other.

  Further, insertion connecting portions 34 protruding left and right outward are provided on both left and right sides of the second mounting member 22, respectively. The insertion connecting portion 34 is a solid substantially rectangular block extending in the front-rear direction, and the lower surface thereof is a flat support surface 36 extending in a direction perpendicular to the axis.

  As shown in FIGS. 2 and 3, the first mounting member 20 and the second mounting member 22 are vertically separated from each other on substantially the same central axis, and the first mounting member 20 and the second mounting member 22 are separated from each other. The main body rubber elastic body 24 is formed between the mounting members 22. The main rubber elastic body 24 is a rubber elastic body having a substantially truncated quadrangular pyramid shape, and is vulcanized and bonded to an end portion on the small diameter side with a lower portion embedded in a lower portion. The upper end of the second mounting member 22 is overlapped and vulcanized and bonded to the radial end.

  The main rubber elastic body 24 is formed with a large-diameter recess 38 having a square concave shape and opening on the lower surface. The large-diameter concave portion 38 is a tapered concave portion that expands toward the opening side (lower side), and has a planar shape in which an upper bottom wall portion extends in a direction substantially perpendicular to the axis at a radially central portion. I have. The lower end surface of the first mounting member 20 and the inner peripheral surface of the upper part of the second mounting member 22 are both covered with the main rubber elastic body 24, and the first mounting member 20 and the second mounting member None of the members 22 is exposed on the inner surface of the large-diameter recess 38.

  Further, the lower part of the second mounting member 22 located below the opening of the large-diameter recess 38 is covered by a seal rubber layer 40 integrally formed with the main rubber elastic body 24. The seal rubber layer 40 is also fixed to the lower surface of the seal projection 28 of the second mounting member 22. Note that the seal rubber layer 40 does not reach the engagement portion 30 of the second attachment member 22, and the engagement portion 30 is exposed from the main rubber elastic body 24.

  Furthermore, a positioning rubber 42 is fixed to the insertion connecting portion 34 of the second mounting member 22. The positioning rubber 42 is formed integrally with the main rubber elastic body 24, and integrally forms the first vertical urging rubber 44, the second vertical urging rubber 46, the front-back urging rubber 52, and the left-right urging rubber 54. Have.

  The first upper and lower urging rubbers 44 are fixed to the upper surface of the insertion connecting portion 34, and in the present embodiment, are formed as a rubber layer that spreads with a substantially constant thickness over the whole, and the upper surface is substantially perpendicular to the axis. It is a flat surface that spreads out. The second vertical urging rubber 46 is fixed to the lower surface of the insertion connecting portion 34, and is a rubber layer that spreads with a substantially constant thickness, like the first vertical urging rubber 44. It is a flat surface that spreads at right angles. Note that the first up-down urging rubber 44 and the second up-down urging rubber 46 of the present embodiment cover the upper and lower surfaces of the insertion connecting portion 34 almost entirely.

  Furthermore, the first vertical urging rubber 44 is thicker in the vertical direction than the second vertical urging rubber 46, and the vertical thickness of the first vertical urging rubber 44 is the second vertical urging rubber 44. It is desirable that the thickness be about 110 to 400% of the vertical thickness of the vertical urging rubber 46.

  The front and rear urging rubbers 52 and the left and right urging rubbers 54 are rubber layers similar to the first and second vertical urging rubbers 44 and 46, and have three ridges provided in parallel at the top and bottom. They are integrally formed so as to protrude outward in the thickness direction. Further, front and rear urging rubbers 52 fixed to the front surface of the insertion connecting portion 34 and left and right urging rubbers 54 fixed to the left and right outer surfaces of the insertion connecting portion 34 are continuously provided along the outer surface of the insertion connecting portion 34. The upper and lower ends of the front and rear urging rubber 52 and the left and right urging rubber 54 are integrally connected to the first vertical urging rubber 44 and the second vertical urging rubber 46.

  On the other hand, the liquid seal assembly 18 has a structure in which a partition member 56, a flexible film 58, and a pressing member 60 are integrally connected as shown in FIG.

  The partition member 56 has a structure in which the partition member main body 62 and the lid plate member 64 are vertically overlapped and fixed to each other. The partition member main body 62 is a hard, substantially square plate-shaped member formed of synthetic resin or metal, and has a recessed recess 66 opened on the upper surface of the inner peripheral portion and a hollow portion opened on the lower surface of the inner peripheral portion. By forming the recess 68, the inner peripheral portion is made thinner in the vertical direction than the outer peripheral portion. Further, a plurality of lower through holes 70 penetrating vertically are formed in the bottom wall portion of the accommodation recess 66 in the partition member main body 62. At the center of the accommodation recess 66, a substantially cylindrical central connecting portion 72 protruding upward from the bottom surface is provided.

  Further, a peripheral groove 74 extending in the circumferential direction while being opened on the upper surface is formed in the thick outer peripheral portion of the partition member main body 62. The circumferential groove 74 extends on the outer peripheral side of the accommodation recess 66 by a predetermined length less than one circumference.

  Furthermore, an inner concave groove 76 is formed in the outer peripheral portion of the partition member main body 62. The inner concave groove 76 is open on the left and right outer surfaces of the partition member main body 62 and is formed continuously over the entire front and rear length of the partition member main body 62.

  The cover plate member 64 has a thin, substantially square plate shape, and a plurality of upper through holes 78 penetrating vertically are provided in a portion covering the housing recess 66 in a state of being fixed to the partition member main body 62 described later. Is formed. Then, the cover plate member 64 is overlaid on the upper surface of the partition member main body 62, and the partition member main body 62 and the cover plate member 64 are fixed to each other by means such as screws or welding (not shown).

  The opening of the housing recess 66 of the partition member main body 62 is covered with the cover plate member 64 by overlapping the partition member main body 62 and the cover plate member 64, and the housing recess 66 of the partition member main body 62 The movable film 80 to be accommodated is disposed between the partition member main body 62 and the cover plate member 64 above and below. The movable membrane 80 has a substantially annular plate shape, and has an inner peripheral end protruding upward. The movable membrane 80 is externally inserted into the central connecting portion 72 of the partition member main body 62, and the inner peripheral end is partitioned. It is supported by the partition member 56 by being vertically sandwiched between the member main body 62 and the cover plate member 64.

  The flexible film 58 is a thin rubber film having a substantially square dome shape, has a slack in the vertical direction, and is easily deformable in the thickness direction. Further, a thick sandwiching portion 82 is formed integrally and continuously over the entire circumference at the outer peripheral end of the flexible film 58.

  The pressing member 60 is formed in a substantially rectangular frame shape, and an inner peripheral portion which is thinner in the vertical direction than the outer peripheral portion is provided so as to be deflected upward.

  The partition member 56, the flexible film 58, and the pressing member 60 having such a structure constitute the liquid seal assembly 18 by being vertically overlapped and connected to each other. Specifically, for example, a connecting protrusion provided on one of the partition member main body 62 and the holding member 60 is inserted into a connecting hole formed on the other of the partition member main body 62 and the holding member 60. In this state, the diameter of the projecting distal end of the connecting projection is increased by heating with a laser or the like, whereby the partition member 56 and the pressing member 60 are connected and fixed to each other. However, the method of fixing the partition member main body 62 and the holding member 60 is not limited to the above example, and may be realized by, for example, screwing or welding. Further, since the holding portion 82 of the flexible film 58 is vertically held between the outer peripheral portion of the partition member main body 62 and the inner peripheral portion of the pressing member 60, the outer peripheral end portion of the flexible film 58 is partitioned. The partition member 56, the flexible film 58, and the pressing member 60 are connected to each other by being sandwiched between the member 56 and the pressing member 60. The outer peripheral end of the flexible film 58 is continuously sandwiched between the partition member main body 62 and the pressing member 60 over the entire circumference, so that the overlapping surface of the partition member main body 62 and the pressing member 60 is formed. The space is sealed annularly.

  Then, as shown in FIG. 3, the liquid seal assembly 18 is attached to the integrally vulcanized molded product 16 with the partition member 56 inserted in the second attachment member 22. Thereby, the partition member 56 overlaps the second mounting member 22 in the projection in the direction perpendicular to the axis, and in the present embodiment, the outer peripheral surface of the partition member 56 is overlapped with the inner peripheral surface of the second mounting member 22. I have.

  Further, between the overlapping surfaces of the inner peripheral surface of the second mounting member 22 and the outer peripheral surface of the partition member 56, the outer concave groove 32 of the second mounting member 22 and the inner concave groove 76 of the partition member main body 62 are provided. A pin insertion hole 84 extending forward and backward is formed, and the positioning pin 86 is inserted into the pin insertion hole 84, whereby the second mounting member 22 and the partition member 56 are relatively positioned in the axial direction.

  The pin insertion hole 84 of the present embodiment has a substantially square cross section, and a pair of mutually independent pairs is provided on the left and right sides, and the pin insertion holes 84 on the left and right sides extend linearly forward and backward, respectively. ing. In the present embodiment, the upper and lower widths of the left and right inner openings of the outer groove 32 are made larger than the upper and lower widths of the left and right outer openings of the inner groove 76. In the present embodiment, the depth dimension of the outer concave groove 32 formed on the second metal attachment member 22 is the same as the depth dimension of the inner concave groove 76 formed on the synthetic resin partition member main body 62. Has been smaller than. Further, the front and rear length of the outer groove 32 is shorter than the front and rear length of the inner groove 76, and the rear end of the outer groove 32 is located forward of the rear end of the inner groove 76.

  Then, as shown in FIGS. 3 and 4, the positioning pins 86, 86 are inserted into the pin insertion holes 84, 84, and the second mounting member 22 and the partition member 56 are axially moved with respect to the positioning pins 86, 86. By being locked, the second mounting member 22 and the partition member 56 are relatively positioned in the axial direction by the positioning pins 86. That is, the left and right outer portions of the positioning pins 86, 86 are inserted into the outer grooves 32 of the second mounting member 22, and the left and right inner portions of the positioning pins 86, 86 are inserted into the inner grooves 76 of the partition member 56. You. Since the rear end of the outer groove 32 is located forward of the rear end of the inner groove 76, the positioning pins 86, 86 are inserted into the outer groove 32 after being inserted into the inner groove 76. .

  By inserting the positioning pins 86, 86 into the pin insertion holes 84, 84, the second mounting member 22 and the partition member 56 are relatively positioned at appropriate axial positions. Thus, the seal rubber layer 40 fixed to the second mounting member 22 is sandwiched between the second mounting member 22 and the partition member 56, and the space between the second mounting member 22 and the partition member 56 is fluid. It is kept tightly sealed. In particular, since the second mounting member 22 and the partition member 56 are relatively positioned in the axial direction, the seal rubber layer 40 is formed between the seal projection 28 of the second mounting member 22 and the upper surface of the partition member 56. The space between the second mounting member 22 and the partition member 56 is sealed by being compressed vertically. In short, the second mounting member 22 and the partition member 56 are locked in the axial direction by the positioning pins 86, 86 inserted into the pin insertion holes 84, 84. Thus, the position between the second mounting member 22 and the partition member 56 is relatively positioned at a sealing position where the sealing member is fluid-tightly sealed.

  Further, since the liquid seal assembly 18 is attached to the integrally vulcanized molded product 16, a fluid chamber 88 that is fluid-tightly separated from the outside is provided between the main rubber elastic body 24 and the flexible film 58 in the axial direction. Is formed. In the fluid chamber 88, a part of the wall is formed of the main rubber elastic body 24, and the other part of the wall is formed of the flexible film 58. The fluid chamber 88 is filled with an incompressible fluid. ing. The incompressible fluid (filled fluid) sealed in the fluid chamber 88 is not particularly limited, but may be, for example, water, ethylene glycol, propylene glycol, alkylene glycol, polyalkylene glycol, silicone oil, or a mixture thereof. A mixed solution or the like is suitably employed. Further, the sealed fluid is desirably a low-viscosity fluid, and more preferably a low-viscosity fluid of 0.1 Pa · s or less is employed in order to advantageously obtain a vibration damping effect based on the fluid flow action described below. You.

  Further, the partition member 56 is disposed so as to extend in a direction substantially perpendicular to the axis in the fluid chamber 88, and the fluid chamber 88 is divided into two parts by the partition member 56. Thus, a pressure receiving chamber 90 in which a part of the wall portion is formed of the main rubber elastic body 24 and in which an internal pressure fluctuation is generated at the time of vertical vibration input is formed above the partition member 56. On the lower side of the member 56, an equilibrium chamber 92 is formed in which a part of the wall portion is constituted by the flexible film 58, and a volume change is allowed and the internal pressure is kept substantially constant. The sealing of the incompressible fluid into the pressure receiving chamber 90 and the equilibrium chamber 92 may be performed, for example, by connecting the integrally vulcanized molded product 16 and the liquid seal assembly 18 using the positioning pins 86, 86 by using an incompressible fluid. It is realized by performing in a water tank filled with. However, after the integrally vulcanized molded article 16 and the liquid seal assembly 18 are fluid-tightly connected by the positioning pins 86, 86, an incompressible fluid may be injected into the pressure receiving chamber 90 and the equilibrium chamber 92 by a syringe or the like. .

  Further, the partition member 56 is formed with an orifice passage 94 that connects the pressure receiving chamber 90 and the balancing chamber 92 to each other. The orifice passage 94 is formed by forming both ends of a tunnel-shaped flow path formed by covering an upper opening of a circumferential groove 74 formed in the partition member main body 62 with a cover plate member 64, and forming both ends of the orifice passage 94 in the cover plate member 64. It is formed by communicating with one of the pressure receiving chamber 90 and one of the equilibrium chamber 92 through an upper communication hole (not shown) and a lower communication hole (not shown) formed in the partition member main body 62. The orifice passage 94 adjusts the ratio (A / L) of the passage cross-sectional area A to the passage length L in consideration of the wall spring stiffness of the fluid chamber 88 so that the tuning frequency, which is the resonance frequency of the flowing fluid, is adjusted to the engine shake. The frequency is set to a frequency corresponding to low-frequency vibration such as. When the low-frequency axial vibration in which the orifice passage 94 is tuned is input, a relative pressure fluctuation between the pressure receiving chamber 90 and the equilibrium chamber 92 is caused, and the sealed fluid flows between the pressure receiving chamber 90 and the equilibrium chamber 92. The fluid flows in a resonant state through the orifice passage 94. As a result, an anti-vibration effect (high damping effect) based on a flow action such as a fluid resonance action is exerted.

  Further, the upper surface of the movable film 80 of the partition member 56 is subjected to the hydraulic pressure of the pressure receiving chamber 90 through the upper through hole 78, and the lower surface thereof is subjected to the hydraulic pressure of the equilibrium chamber 92 through the lower through hole 70. Accordingly, when the hydraulic pressure in the pressure receiving chamber 90 is significantly reduced with respect to the hydraulic pressure in the equilibrium chamber 92 due to the input of a large load, the movable membrane 80 is elastically deformed and separates from the bottom surface of the housing recess 66. Thereby, the lower through-hole 70 covered with the movable film 80 is opened, and the pressure receiving chamber 90 and the equilibrium chamber 92 are mutually communicated through the upper through-hole 78, the accommodation recess 66, and the lower through-hole 70. As a result, the negative pressure in the pressure receiving chamber 90 is reduced or eliminated as quickly as possible, and the generation of cavitation bubbles is prevented, so that the generation of abnormal noise due to cavitation is prevented. In addition, when a vibration having a frequency higher than the tuning frequency of the orifice passage 94 is input, a vibration isolating effect (vibration insulating effect) is exerted based on hydraulic pressure transmission between the pressure receiving chamber 90 and the equilibrium chamber 92 due to elastic deformation of the movable film. Can be adopted.

  A bracket 14 is mounted on the mount body 12 having such a structure. The bracket 14 is a high-rigidity member formed of a metal such as an aluminum alloy, a fiber-reinforced synthetic resin, or the like, and as shown in FIGS. And a top plate 98 that integrally connects the upper ends of the left and right mounting legs 96, 96.

  The left and right mounting legs 96, 96 are formed in a thick plate shape having a predetermined width dimension in the front-rear direction, are disposed so as to face each other on the left and right, and are provided at both front and rear ends and a front-rear intermediate portion. Reinforcing ribs 100 projecting left and right outward are integrally formed. Also, the lower ends of the left and right mounting legs 96, 96 are formed in a plate shape that spreads outward in the left and right directions, and the mounting nuts 102 are fixed thereto.

  The left and right mounting legs 96, 96 of the bracket 14 are provided with connecting grooves 104, which open inward in the opposing direction and extend forward and backward, respectively. The connecting grooves 104 are used to insert the second mounting member 22. It has a groove shape substantially corresponding to the connecting portion 34. More specifically, the connection groove portion 104 is configured such that the upper inner surface 106 and the lower inner surface 108, which are the inner surfaces of the groove side walls, are planes each extending in a direction perpendicular to the axis, and face each other at a predetermined distance vertically. The left and right inner surfaces 110, which are the inner surfaces of the groove bottoms, are planes extending vertically and forward and backward, and are continuous with the upper inner surface 106 and the lower inner surface 108.

  Note that the groove width dimension (the vertical distance between the upper inner surface 106 and the lower inner surface 108) of the connecting groove portion 104 is equal to the vertical thickness size of the insertion connecting portion 34 in the mount body 12 itself before the bracket 14 is attached, and the first and second thicknesses. Are smaller than the total value of the upper and lower urging rubbers 44 and 46 with the upper and lower thickness dimensions.

  Lock projections 112 are formed on the left and right mounting legs 96, 96, respectively. As shown in FIGS. 6 and 7, the lock protrusion 112 protrudes upward from the lower inner surface 108 at the rear end of the connection groove 104. The lock projection 112 of the present embodiment is formed at the left and right outer end portions of the connection groove 104 and is partially formed in the groove depth direction of the connection groove 104, but is formed in the groove depth direction of the connection groove 104. May be formed over the whole. Further, the lock projection 112 has a projecting dimension that is gradually reduced toward the rear, and an inclined surface 114 whose tip end surface (upper surface) is inclined downward toward the rear. The inclined surface 114 of the present embodiment is a single plane having a substantially constant inclination angle in the front-rear direction, but has a curved surface in which the inclination angle continuously changes in the front-rear direction, or a stepped inclination angle in the front-rear direction. It may be a bent surface that changes to.

  Further, the protruding height (maximum protruding height) of the front end of the lock protruding portion 112 is the thickness of the first vertical urging rubber 44 covering the upper surface of the insertion connecting portion 34 and covering the lower surface of the inserting connecting portion 34. The thickness of the second upper / lower urging rubber 46 is smaller than the total thickness. Further, the distance between the opposing surfaces in the front-rear direction of the lock protrusion 112 and a front wall portion 116 described later is longer than the front-rear length of the insertion connection portion 34, and the front end of the front-rear bias rubber 52 from the rear end of the insertion connection portion 34. It is shorter than the distance.

  At the upper ends of the left and right mounting legs 96, 96, a top plate 98 is integrally formed. The top plate portion 98 is formed in a plate shape extending left and right with a predetermined width in the front and rear directions. Reinforcing ribs 100 are formed so as to protrude upward at both front and rear end portions and front and rear intermediate portions. Reinforcing ribs 115 are integrally formed between the front and rear portions of 100, 100, and 100, respectively.

  A front wall 116 is formed integrally with the front ends of the left and right mounting legs 96, 96. The front wall portion 116 is formed in a plate shape extending in the left-right direction, and is disposed downward and separated from the top plate portion 98. The front and rear middle portions of the left and right mounting legs 96, 96 are formed by the front wall portion 116. They are integrally connected. The front ends of the connecting grooves 104 formed in the left and right mounting legs 96, 96 are closed by the front wall 116, and the left and right outer ends of the front wall 116 are connected to the left and right mounting legs 96, 96. A through-hole penetrating the portion forward and backward communicates with the connection groove 104. In addition, through holes are formed at both left and right end portions of the front wall portion 116 so as to penetrate back and forth, and the front end of the connection groove portion 104 is closed with the through hole communicating forward.

  A bottom plate 118 is integrally formed between the facing surfaces of the left and right mounting legs 96, 96. The bottom plate portion 118 has a plate shape extending left and right with a predetermined width in the front and rear direction, and is disposed vertically opposite to the top plate portion 98. The lower ends of the parts 116 are integrally connected by a bottom plate part 118. Further, a window 120 that allows the flexible film 58 to deform is formed in the bottom plate 118 so as to penetrate vertically. The bottom plate 118 is provided below the connecting groove 104.

  Then, the bracket 14 is attached to the mount body 12. That is, the mount body 12 is inserted laterally from the rear into the region surrounded by the left and right mounting legs 96, 96, the top plate 98, and the bottom plate 118 of the bracket 14, and the second mounting member of the mount body 12 is provided. The bracket 14 is mounted on the mount main body 12 by inserting the insertion connecting portions 34 of the 22 into the connecting grooves 104 of the bracket 14.

  More specifically, the insertion connection portion 34 is inserted into the connection groove portion 104, and as shown in FIG. 8, the insertion connection portion 34 to which the first vertical urging rubber 44 and the second vertical urging rubber 46 are fixed. Of the connecting groove 104 is vertically held between the upper inner surface 106 and the lower inner surface 108 of the connecting groove 104. As a result, the insertion connection portion 34 and the connection groove portion 104 are mutually locked in the vertical direction, and the second mounting member 22 including the insertion connection portion 34 is vertically moved with respect to the bracket 14 including the connection groove portion 104. Positioned.

  Since the sum of the vertical thickness of the insertion connecting portion 34 and the vertical thickness of the first and second vertical urging rubbers 44 and 46 is larger than the vertical groove width of the connecting groove 104, the mounting In a state where the bracket 14 is mounted on the main body 12, the first vertically biasing rubber 44 is vertically compressed between the upper surface of the insertion connecting portion 34 and the opposing surface of the upper inner surface 106 of the connecting groove 104, and The vertical urging rubber 46 is vertically compressed between the lower surface of the insertion connecting portion 34 and the opposing surface of the lower inner surface 108 of the connecting groove portion 104. As a result, the second mounting member 22 including the insertion connection portion 34 is vertically moved with respect to the bracket 14 including the connection groove portion 104 by the first vertical urging rubber 44 and the second vertical urging rubber 46. It is elastically positioned.

  Furthermore, the vertical thickness of the first vertical urging rubber 44 fixed to the upper surface of the insertion connecting portion 34 and the vertical thickness of the second vertical urging rubber 46 fixed to the lower surface of the insertion connecting portion 34. Is greater than the vertical projection height of the lock projection 112. As a result, the insertion connection portion 34 is inserted into the connection groove 104 over the lock protrusion 112 by the vertical compression deformation of the first vertical urging rubber 44 and the second vertical urging rubber 46. .

  As described above, the insertion connecting portion 34 has a structure that goes over the lock protrusion 112 by the elastic deformation of the first vertical urging rubber 44 and the second vertical urging rubber 46, so that the insertion connecting portion 34 is connected to the connecting groove 104. The insertion connection portion 34 and the connection groove portion 104 do not need to be deformed when inserted, and the durability of the second mounting member 22 provided with the insertion connection portion 34 and the bracket 14 provided with the connection groove portion 104 is improved. In particular, in the engine mount 10 in which the second mounting member 22 and the bracket 14 are formed of a synthetic resin, damage when the second mounting member 22 and the bracket 14 are assembled is prevented.

  Further, since the lower surface of the insertion connecting portion 34 is covered with the second vertical urging rubber 46, when the insertion connecting portion 34 gets over the lock protrusion 112, the lower surface of the insertion connection portion 34 and the lock protrusion 112 Prevents direct contact of the protruding tips of the protruding portions, thereby preventing damage to the insertion connecting portion 34 and the lock protruding portion 112. In addition, since the second upper / lower urging rubber 46 locally undergoes a large elastic deformation at the contact point with the lock projection 112, the insertion / connection section 34 is inserted into the connection groove 104 while climbing over the lock projection 112. Is reduced, and the work of assembling the mount body 12 and the bracket 14 is facilitated.

  Furthermore, in the present embodiment, since the protrusion height of the lock protrusion 112 is gradually reduced toward the rear, the insertion connecting portion 34 can easily get over the lock protrusion 112.

  Further, as shown in FIG. 9, the insertion connection portion 34 is locked in the front-rear direction with the lock projection 112 of the connection groove portion 104, so that the insertion connection portion 34 is prevented from dropping backward from the connection groove portion 104. As a result, separation between the mount body 12 and the bracket 14 is prevented. That is, the insertion connecting portion 34 is displaced upward by the elastic deformation of the first up-and-down urging rubber 44 when going over the lock protrusion 112, and is inserted into the connection groove 104 over the lock protrusion 112. Then, the first upper and lower urging rubbers 44 are urged downward by the elastic restoring deformation to be displaced. Accordingly, the insertion connecting portion 34 inserted forward of the lock protrusion 112 of the connection groove portion 104 overlaps the lock protrusion 112 with a predetermined width in the vertical projection in the front-rear projection (FIGS. 9 and 10). reference). Then, the insertion connection portion 34 inserted into the connection groove portion 104 is locked in the front-rear direction with the lock protrusion 112 of the connection groove portion 104, so that the insertion connection portion 34 is prevented from falling out of the connection groove portion 104. It has become.

  Further, the first vertical urging rubber 44 and the second vertical urging rubber 46 are integrally formed, and the first vertical urging rubber 44 is thicker than the second vertical urging rubber 46. Therefore, when the insertion connecting portion 34 gets over the lock protrusion 112, the amount of vertical compression deformation of the first vertical urging rubber 44 is larger than the amount of vertical compression deformation of the second vertical urging rubber 46. Become. Then, when the insertion connecting portion 34 is inserted into the connecting groove portion 104 in front of over the lock protrusion 112, the amount of elastic restoring deformation of the first vertical urging rubber 44 becomes larger than that of the second vertical urging rubber 46. It becomes larger than the amount of elastic restoration deformation. Accordingly, the insertion connecting portion 34 is displaced downward from the position over the lock protrusion 112 due to the difference between the deformation amount of the first vertical urging rubber 44 and the deformation amount of the second vertical urging rubber 46. . Thereby, the lower part of the insertion connecting part 34 is inserted between the front wall part 116 and the lock protrusion 112 in the connecting groove part 104, and is positioned in the front-rear direction between the front wall part 116 and the lock protrusion 112. .

  Further, since the front-rear biasing rubber 52 fixed to the front surface of the insertion connection portion 34 is compressed back and forth between the insertion connection portion 34 and the front wall portion 116, the insertion connection portion 34 moves rearward with respect to the bracket 14. It is elastically biased. As a result, the insertion connecting portion 34 is pressed against the lock protrusion 112 in the front-rear direction, and the mount body 12 including the insertion connecting portion 34 and the bracket 14 including the connection groove portion 104 are relatively positioned in the front-rear direction. In addition, it is possible to prevent the insertion connection portion 34 and the lock protrusion 112 from coming into contact with each other from a state separated in the front-rear direction, thereby generating abnormal noise.

  Furthermore, since the vertical dimension of the front surface of the lock protrusion 112 is large, the insertion connecting portion 34 located forward over the lock protrusion 112 has a large area with respect to the lock protrusion 112 in the front-rear direction. As a result, the insertion connecting portion 34 and the connecting groove portion 104 are effectively positioned in the front-rear direction. In addition, since both the rear surface of the insertion connecting portion 34 and the front surface of the lock projection 112 extend substantially perpendicularly to the front-rear direction, the insertion connecting portion 34 is prevented from coming out of the connecting groove 104 rearward. This can be effectively prevented by the front and rear locking of the portion 34 and the lock projection 112.

  Further, in the present embodiment, the left and right urging rubbers 54 are fixed to the left and right outer surfaces of the insertion connecting portion 34, and the left and right urging rubbers 54 are compressed between the insertion connecting portion 34 and the left and right inner surfaces 110 of the connecting groove portion 104. ing. As a result, the error between the distance between the left and right outer surfaces of the left and right insertion connecting portions 34, 34 in the mount body 12 and the distance between the left and right connecting groove portions 104, 104 in the bracket 14 due to dimensional errors of the components and the like. The mounting of the mount body 12 and the bracket 14 is facilitated by being allowed by the right and left urging rubbers 54.

  As shown in FIG. 1, the engine mount 10 is configured such that the first mounting member 20 is mounted on the power unit 122, and the bracket 14 fixed to the second mounting member 22 is mounted on the vehicle body 124 by the mounting nut 102. By being attached, the power unit 122 is mounted on the vehicle, and the load supported by the power unit 122 acts on the mount main body 12 downward in the mounted state on the vehicle. In the present embodiment, since the second vertical urging rubber 46 fixed to the lower surface of the insertion connecting portion 34 of the mount body 12 is thinner than the first vertical urging rubber 44, the power unit The amount of elastic deformation of the positioning rubber 42 due to the action of the shared support load 122 is reduced, and the durability of the positioning rubber 42 is improved.

  In the present embodiment, as shown in FIG. 2, when the mount body 12 is mounted on the bracket 14, the second mounting member 22 and the liquid seal assembly 18 are connected to the upper inner surface 106 of the connection groove 104 of the bracket 14. By being vertically sandwiched between and the upper surface of the bottom plate portion 118, it is relatively positioned and held vertically. Therefore, the positioning pin 86 inserted between the second mounting member 22 and the partition member 56 while maintaining a fluid-tight seal between the second mounting member 22 and the liquid ring assembly 18. Can be removed from the pin insertion hole 84, and the positioning pin 86 can be used repeatedly.

  As mentioned above, although embodiment of this invention was described in full detail, this invention is not limited by the specific description. For example, the lock projection is desirably provided at the rear end of the connection groove in the insertion direction, but may be provided at an intermediate portion in the insertion direction.

  Also, the first vertically biased rubber does not necessarily have to be thicker in the vertical direction than the second vertically biased rubber, and the first vertically biased rubber and the second vertically biased rubber have substantially the same thickness. The first vertical urging rubber may be thinner than the second vertical urging rubber. Further, the first vertically biasing rubber and the second vertically biasing rubber can be formed separately from the main rubber elastic body, the front and rear biasing rubber, the left and right biasing rubber, and formed separately from each other. You can also. Furthermore, the front and rear urging rubber and the left and right urging rubber can be omitted.

  In addition, the first vertical biasing rubber may be fixed to the lower surface of the insertion connecting portion, and the second vertical biasing rubber may be fixed to the upper surface of the insertion connecting portion. The portion is formed to protrude from the upper inner surface of the connection groove.

  Further, while the lock projection is formed partially in the groove depth direction in the connection groove, a notch opening on the lower surface of the insertion connection portion is formed to extend forward and backward with a cross-sectional shape corresponding to the lock protrusion. In addition, a structure in which a locking projection protruding downward is formed at the rear end of the notch may be employed. According to this, when inserting the insertion connection portion into the connection groove portion, the lock protrusion moves within the notch, thereby reducing insertion resistance due to the contact between the lock protrusion and the second vertical urging rubber. This facilitates the work of assembling the vibration isolator body and the bracket. In addition, the second vertical urging rubber can be fixed to a portion of the notch left and right and can also be fixed to the projecting front end surface of the locking projection.

  In the above-described embodiment, the mount body 12 of the fluid-filled type is exemplified as the vibration isolator main body. However, for example, a solid type vibration isolator in which the first mounting member and the second mounting member are elastically connected by the main rubber elastic body. It is also possible to employ a main body, an active-type fluid-filled type vibration damping device main body that obtains an active vibration-damping effect by an actuator, a switchable fluid-filled type vibration damping device main body capable of switching vibration-damping characteristics, and the like. . Further, in the mount main body 12 of the above embodiment, the structure in which the integrally vulcanized molded product 16 and the liquid seal assembly 18 are positioned and held by the positioning pins 86 is exemplified. You may do it.

  The specific structure of the bracket shown in the above embodiment is merely an example, and if a bracket is provided, the mounting structure to the vehicle body 124, the presence or absence of the top plate 98 and the bottom plate 118, and the specific structure The structure and the like can be appropriately changed.

10: engine mount (vibration isolator with bracket), 12: mount body (vibration isolator body), 14: bracket, 20: first mounting member, 22: second mounting member, 24: rubber elastic body, 34: insertion connecting part, 44: first vertical urging rubber, 46: second vertical urging rubber, 52: front and rear urging rubber, 104: coupling groove, 112: lock projection, 114: inclined surface, 116 : Front wall

Claims (5)

A first mounting member and a second mounting member which are vertically separated from each other are provided with a vibration isolator main body having a structure in which the first and second mounting members are elastically connected to each other by a main rubber elastic body; In the vibration isolator with bracket inserted by
An insertion connection portion is provided on the second mounting member of the vibration isolator main body, and a first vertical urging rubber is fixed to one of upper and lower outer surfaces of the insertion connection portion, and the insertion connection portion is provided. While the second upper and lower urging rubber is fixed to the outer surface of the other one of the upper and lower parts of the part,
The bracket is provided with a connecting groove extending in a direction in which the vibration isolator main body is inserted into the bracket, and a lock protrusion is formed on one of the upper and lower inner surfaces of the connection groove, and the lock protrusion is provided. Is smaller than the total of the vertical thickness of the first vertical urging rubber and the second vertical urging rubber,
The insertion connecting portion which is laterally inserted into the connection groove portion over the lock protrusion is vertically moved with respect to the connection groove portion by the first vertical urging rubber and the second vertical urging rubber. It is characterized by being relatively positioned and being urged up or down by the first up-down urging rubber to be pulled out from the connection groove by being locked to the lock projection. Anti-vibration device with bracket.   The anti-vibration device with a bracket according to claim 1, wherein the first vertical urging rubber is thicker in the vertical direction than the second vertical urging rubber.   The bracket with the bracket according to claim 2, wherein the first vertical biasing rubber is fixed to an upper surface of the insertion connecting portion, and the second vertical pressing rubber is fixed to a lower surface of the insertion connecting portion. Anti-vibration device.   The protruding tip surface of the lock protrusion is an inclined surface that is inclined with respect to the insertion direction, and the protrusion dimension of the lock protrusion decreases toward the rear in the insertion direction. The vibration isolator with a bracket according to claim 1.   A front and rear urging rubber is fixed to a front surface in the insertion direction of the insertion connection portion, and a front wall portion closing a front end in the insertion direction of the connection groove portion is provided in the bracket, and the insertion connection portion and the front wall portion are provided. The anti-vibration device with a bracket according to any one of claims 1 to 4, wherein the front-rear biasing rubber is compressed back and forth in the insertion direction.

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