JP2018096507A - Active type seismic isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an active type seismic isolator having an improved structure capable of realizing a seismic isolation performance or the like to be required while a free degree in design of a main body rubber elastic body is being substantially assured at a seismic isolator mount main body and capable of corresponding to a vibration adding force to be required or a stroke and the like while a free design degree of a rubber wall is being assured at the vibration applying means.SOLUTION: This invention comprises a seismic isolator mount main body 12 in which a first fixing member 16 and a second fixing member 18 are connected by a main body rubber elastic body 20 and a pressure control chamber 78 to which pressure medium is filled and a pressure variation by an actuator 84 is applied, and includes vibration adding means 14 where an output member 70 is elastically supported by a rubber wall 50 of the pressure control chamber 78. A first fixing member 16 of the vibration isolator mount main body 12 and the output member 70 of the vibration adding means 14 are integrated and at the same time the second fixing member 18 of the vibration isolator mount main body 12 and the output member 70 of the vibration adding means 14 are applied as an integrated structure and the second fixing member 18 of the vibration isolator mount main body 12 and the pressure control chamber 78 of the vibration adding means 14 are integrally supported.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an active vibration isolator that actively reduces input vibration by an excitation force of an actuator.

  Conventionally, an anti-vibration device is known as a kind of anti-vibration support body or anti-vibration coupling body that is arranged between members constituting a vibration transmission system and that mutually anti-vibrates and connects the components of the vibration transmission system. ing. In the vibration isolator, a first attachment member attached to one of the constituent members of the vibration transmission system and a second attachment member attached to the other of the constituent members of the vibration transmission system are elastically connected by the main rubber elastic body. It has a structure.

  By the way, as an anti-vibration device, there is also an active anti-vibration device that can reduce input vibration in an offset manner by an output of an actuator. As shown in Japanese Patent No. 5641525 (Patent Document 1), this active vibration isolator includes a pressure control chamber filled with a pressure medium and subjected to pressure fluctuations by an actuator, and rubber in the pressure control chamber. Excitation means having an output member elastically supported by a wall is provided. The output of the actuator is exerted on the output member via the pressure medium filled in the pressure control chamber, so that the input vibration is reduced in an offset manner by the output of the actuator.

  However, in the active vibration isolator described in Patent Document 1, the pressure control chamber that transmits the output of the actuator to the output member is the main liquid chamber of the vibration isolating mount body, and the main rubber elastic body of the vibration isolating mount body And the rubber wall of the excitation means constitute the wall of the pressure control chamber, the vibration isolation characteristics of the vibration isolation mount body and the vibration excitation characteristics of the actuator interact with each other. It was difficult to independently adjust the vibration characteristics.

Japanese Patent No. 5641525

  The present invention has been made in the background of the above-mentioned circumstances, and its solution is to ensure a large degree of design freedom for the main rubber elastic body in the vibration-proof mount body, and to provide the required vibration-proof performance. It has a new structure that is highly feasible and has a large degree of freedom in designing the rubber wall in the vibration means, making it possible to meet the required vibration force and vibration stroke. An object is to provide an active vibration isolator.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  That is, the first aspect of the present invention is an active vibration isolator, wherein the first mounting member and the second mounting member are connected by the main rubber elastic body, and the pressure medium is filled. A pressure control chamber that is subjected to pressure fluctuations by the actuator, and an excitation means whose output member is elastically supported by a rubber wall of the pressure control chamber. The first mounting member and the output member of the vibration means are integrated, and the second mounting member of the vibration isolation mount body and the pressure control chamber of the vibration means are It is characterized by being integrally supported.

  According to the active vibration isolator having the structure according to the first aspect as described above, the vibration means for applying the vibration force to the vibration isolation mount body that receives the support load is substantially separated as a separate structure. I was able to be independent. As a result, the rubber elastic body of the vibration isolating mount body ensures a large degree of design freedom according to the required vibration isolating performance, and the rubber wall of the vibration exciting means requires the required excitation force and stroke. As a result, a large degree of design freedom corresponding to the above is ensured, and the performance can be easily improved as a whole.

  Further, the first mounting member of the vibration isolating mount body and the output member of the vibration means are integrated, and the second mounting member of the vibration isolation mount body and the pressure control chamber of the vibration means are integrated. In the vibration-proof mount body and the vibration means substantially independent of each other, the excitation force of the actuator exerted on the output member of the vibration means is substantially equal to the first mounting member in the vibration-proof mount body. It is possible to effectively act between the second mounting members.

  According to a second aspect of the present invention, in the active vibration isolator described in the first aspect, the first mounting member of the vibration-proof mount body and the output member of the vibration means that are separate members from each other. Are integrated by a connecting mechanism.

  According to the second aspect, the first mounting member and the output member are separated from each other and integrated with the coupling mechanism, so that it is easy to manufacture the vibration-proof mount body and the vibration means. The assembly work of the vibration-proof mount main body and the vibration means is also facilitated. Further, for example, by sharing one of the vibration-proof mount body and the vibration means and making it possible to selectively change either one, it is possible to efficiently cope with various demands.

  According to a third aspect of the present invention, in the active vibration isolator described in the first or second aspect, the second attachment member of the vibration isolation mount body and the pressure control chamber of the vibration means. The second mounting member and the pressure control chamber can be adjusted relative to each other in a direction perpendicular to the direction of vibration by the output member of the vibration means. Is.

  According to the third aspect, the second mounting member and the pressure control chamber can be adjusted relative to each other in a direction orthogonal to the excitation direction, and thereby the second mounting member caused by a dimensional error of the component, etc. The relative position shift of the pressure control chamber can be allowed in a direction orthogonal to the excitation direction.

  According to a fourth aspect of the present invention, in the active vibration isolator described in any one of the first to third aspects, the first attachment member in the vibration isolating mount body is in a main load input direction. The output member of the excitation means is provided with an integral structure in a linear direction toward the outside, and the excitation force by the output member is exerted on the main load input direction of the first mounting member. It is what.

  According to the fourth aspect, the main load input to the first mounting member and the excitation force applied from the actuator to the output member act in substantially the same linear direction, thereby canceling out the main input load. Can be obtained efficiently.

  According to a fifth aspect of the present invention, in the active vibration isolator described in any one of the first to fourth aspects, a mount attachment portion to which the vibration isolation mount body is attached and the vibration means are attached. The vibration means mounting portion is provided with a bracket provided integrally, and the mount mounting portion in the bracket has a laterally open structure, and is provided with respect to the first mounting member. While the vibration isolation connection target member can be attached from the side, the vibration means attachment portion has an annular structure that supports the periphery of the rubber wall, and the vibration means attachment portion has the above-mentioned vibration addition means. A cover member that covers the vibration means is attached.

  According to the fifth aspect, since the mount mounting portion in the bracket has a laterally open structure, it is easy to mount the vibration isolation connection target member on the vibration isolation mount body. Further, since the vibration means attaching portion has an annular structure, the rubber wall is attached to the bracket over the entire circumference, so that the pressure control chamber can be easily sealed with excellent reliability. Further, since the cover member that covers the vibration means is attached to the vibration means attachment portion of the bracket, the vibration means is protected from the outside by the vibration means attachment portion and the cover member having an annular structure, so that durability and reliability are ensured. Improvement and the like. In particular, by covering the actuator together with the vibration means with a cover member, it is possible to realize the reliability of the operation of the actuator.

  According to a sixth aspect of the present invention, in the active vibration isolator described in any one of the first to fifth aspects, the excitation means includes an input side rubber wall and an output side rubber wall superimposed. And a liquid seal structure including a fluid chamber in which an incompressible fluid is sealed between the overlapping surfaces of the two rubber walls, and the center of the input-side rubber wall. A piston member to which an output shaft of an electromagnetic actuator disposed outside the input side rubber wall is connected is fixed to the portion, while the output member is fixed to a central portion of the output side rubber wall. It is what has been.

  According to the sixth aspect, the fluid chamber as the pressure control chamber in which the incompressible fluid as the pressure medium is sealed is interposed between the piston member connected to the output shaft of the electromagnetic actuator and the output member. Therefore, the displacement of the position of the piston member and the output member due to the dimensional error of parts is allowed. Further, by adopting an electromagnetic actuator as the actuator, it is possible to accurately apply an active excitation force to the fluid chamber, and to effectively obtain a vibration isolation effect due to the excitation force.

  According to the present invention, the vibration-proof mount body and the vibration means are provided, and the rubber elastic body of the vibration-proof mount body and the rubber wall of the pressure control chamber of the vibration means are separated from each other. The vibration-proof mount body that receives the supporting load and the vibration means that exerts the vibration force can be made substantially independent from each other as separate structures. Therefore, the rubber elastic body of the vibration isolating mount body has a large degree of design freedom according to the required vibration isolating performance and the required vibration force and stroke on the rubber wall of the vibration exciting means. As a result, a large degree of design freedom corresponding to the above is ensured, and the performance can be easily improved as a whole.

  Further, the first mounting member of the vibration isolating mount body and the output member of the vibration means are integrated, and the second mounting member of the vibration isolation mount body and the pressure control chamber of the vibration means are integrated. As a result, the excitation force of the actuator exerted on the output member can be effectively applied between the first mounting member and the second mounting member.

The perspective view which shows the active vibration isolator as 1st embodiment of this invention. The front view of the active vibration isolator shown in FIG. The top view of the active vibration isolator shown in FIG. IV-IV sectional drawing of FIG. VV sectional drawing of FIG.

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

  1-3, an active vibration isolator 10 as a first embodiment of the present invention is known. The active vibration isolator 10 includes an anti-vibration mount main body 12 and a vibration means 14. The anti-vibration mount main body 12 includes a first attachment member 16 and a second attachment member 18 that are formed by a main rubber elastic body 20. It has an elastically connected structure. In the following description, the vertical direction is the main load input direction in FIG. 2, the front-rear direction is the vertical direction in FIG. 3, which is the vehicle front-rear direction when the vehicle is mounted, and the left-right direction is vehicle-mounted The left-right direction in FIG.

  More specifically, as shown in FIGS. 4 and 5, the first mounting member 16 has a substantially cylindrical shape extending in the front-rear direction, a mounting cylinder portion 24 formed through the fastening bolt hole 22 at the center, and a mounting cylinder portion 24. A first connecting piece 28 provided with a first connecting screw hole 26 penetrating back and forth in the form of a plate protruding upward, an adhering portion 30 protruding downward from the mounting cylinder 24, and left and right from the mounting cylinder 24 The plate-like stopper portions 32, 32 projecting to the side are integrally provided. The first mounting member 16 is a high-rigidity member formed of a metal such as iron or an aluminum alloy, or a synthetic resin reinforced with glass fiber or carbon fiber. The fastening bolt hole 22 of the mounting cylinder portion 24 is not threaded on the inner peripheral surface, and the thread is formed on the inner peripheral surface of the first connecting screw hole 26 of the first connecting piece 28. ing.

  The second mounting member 18 is a highly rigid member formed of the same material as the first mounting member 16 and includes a pair of left and right plate-like portions 34, 34. 34 are arranged so as to incline gradually upward as they go to the left and right sides. Further, as shown in FIG. 2, a positioning piece 36 that is bent and spreads downward in the thickness direction is integrally formed at the front end of the plate-like portion 34. Furthermore, as shown in FIG. 4, the plate-like portion 34 is formed with a communication hole 38 that penetrates the central portion in the thickness direction. In the present embodiment, the left and right plate-like portions 34 are independent of each other, but may be continuous between the left and right.

  And the 2nd attachment member 18 is arrange | positioned apart from the left and right diagonally downward of the 1st attachment member 16, and these 1st attachment members 16 and the 2nd attachment member 18 are elastically connected by the main body rubber elastic body 20. Has been. The main rubber elastic body 20 includes a pair of left and right rubber legs 40, 40 extending between the first mounting member 16 and the second mounting member 18, and one end of each rubber leg 40, 40 is the first mounting member. 16, and the other ends of the rubber legs 40, 40 are vulcanized and bonded to the second mounting member 18. Further, as shown in FIG. 5, both front and rear end portions of the mounting cylinder portion 24 in the first mounting member 16 are exposed from the main rubber elastic body 20. Further, as shown in FIG. 4, the plate-like portions 34, 34 of the second mounting member 18 are fixed in an embedded state with respect to the main rubber elastic body 20, and the positioning pieces 36, 36 are the main rubber elastic body. 20 is exposed. In the present embodiment, the surface of the plate-like portion 34 is covered with a fitting rubber layer 41 integrally formed with the rubber legs 40 of the main rubber elastic body 20, and the thickness of the plate-like portion 34 in the fitting rubber layer 41. The portions fixed to the upper surface and the lower surface in the direction are integrally connected to the outer peripheral side of the plate-like portion 34 through the communication hole 38. The main rubber elastic body 20 is formed as an integrally vulcanized molded product including the first mounting member 16 and the second mounting member 18.

  Furthermore, the main rubber elastic body 20 is integrally provided with a buffer rubber layer 42 that covers the left and right outer surfaces and the upper surface of the stopper portion 32 of the first mounting member 16. The surface of the buffer rubber layer 42 of the present embodiment has a substantially flat shape, but, for example, irregularities are formed on the left and right outer surfaces and the upper surface, and the stopper action is more buffered at the rebound stopper and the left and right stoppers described later. You may be made to do. Moreover, the buffer rubber layer 42 can also be formed, for example so that the left-right outer surface and upper surface of the stopper part 32 may each be covered partially.

  Furthermore, the main rubber elastic body 20 is integrally provided with a stopper rubber 44 that protrudes downward from the lower surface of the fixing portion 30 of the first mounting member 16. A plurality of concave grooves 46 extending in the front-rear direction are formed at the protruding tip end portion of the stopper rubber 44.

  On the other hand, as shown in FIGS. 4 and 5, the vibration means 14 is provided between the input side rubber wall 48 and the output side rubber wall 50 formed separately from the main rubber elastic body 20 of the vibration isolation mount body 12. The fluid chamber 78 is formed as a pressure control chamber.

  The input-side rubber wall 48 has a substantially annular plate shape, and the piston member 52 is fixed to the inner peripheral end portion, and the input-side outer peripheral member 54 is fixed to the outer peripheral end portion. The piston member 52 is integrally formed with an output shaft 110 of an electromagnetic actuator 84 to be described later. A central portion in the radial direction connected to the output shaft 110 has a cylindrical shape, and protrudes from the lower end portion of the central portion to the outer periphery. In addition, an annular outer peripheral portion that is bent and extends downward is integrally provided. The input-side outer peripheral member 54 has a thin-walled, large-diameter, generally annular or cylindrical shape, and an inner flange portion 60 that protrudes toward the inner periphery is integrally formed at the upper end portion, and an outer periphery is formed at the lower end portion. An outer flange portion 62 that protrudes toward is integrally formed.

  The piston member 52 is vulcanized and bonded to the inner peripheral end of the input side rubber wall 48, and the upper portion of the input side outer peripheral member 54 is vulcanized and bonded to the outer peripheral surface of the input side rubber wall 48. Further, the inner peripheral surface of the input side outer peripheral member 54 is covered with a seal rubber layer 64 integrally formed with the input side rubber wall 48, and the upper surface of the inner peripheral portion of the outer flange portion 62 is connected to the input side rubber wall 48. The integrally formed sealing rubber 66 is fixed. The input side rubber wall 48 of the present embodiment is formed as an integral vulcanization molded product including a piston member 52 and an input side outer peripheral member 54.

  The output-side rubber wall 50 has a substantially truncated cone shape that is upside down and is formed with a large mortar-shaped recess 68 that is open on the upper surface. Further, an output member 70 is fixed to the radially central portion of the output side rubber wall 50. The output member 70 is integrally formed with a substantially disc-shaped fixing portion 71 and a second connecting piece 74 including a second connecting screw hole 72 penetrating back and forth in a plate shape protruding downward from the fixing portion 71. Have a structure. Furthermore, an output side outer peripheral member 76 is fixed to the outer peripheral surface of the output side rubber wall 50. The output-side outer peripheral member 76 has a thin-walled and large-diameter substantially annular shape or a cylindrical shape, and an upper end portion is bent toward the inner peripheral side.

  The fixing portion 71 of the output member 70 is fixed to the radial center portion of the output side rubber wall 50, and the output side outer peripheral member 76 is fixed to the outer peripheral surface of the output side rubber wall 50. The output side rubber wall 50 of the present embodiment is formed as an integrally vulcanized molded product including the output member 70 and the output side outer peripheral member 76.

  The input-side rubber wall 48 and the output-side rubber wall 50 having such a structure are stacked so as to face each other in the vertical direction, and pressure control is performed between the overlapping surfaces of the input-side rubber wall 48 and the output-side rubber wall 50. A fluid chamber 78 is formed as a chamber. In other words, the fluid chamber 78 is formed by the large-diameter recess 68 by the upper opening of the large-diameter recess 68 formed in the output-side rubber wall 50 being covered with the input-side rubber wall 48. . It should be noted that the output side outer peripheral member 76 fixed to the output side rubber wall 50 is press-fitted into the input side outer peripheral member 54 fixed to the input side rubber wall 48 from below, or after the output side outer peripheral member 76 is inserted. When the input side outer peripheral member 54 is drawn, the input side rubber wall 48 and the output side rubber wall 50 are connected to each other at the outer peripheral portion, and a fluid chamber 78 that is fluid-tightly separated from the outside is defined. Has been. In this embodiment, the seal rubber layer 64 integrally formed with the input side rubber wall 48 is narrowly provided between the input side outer peripheral member 54 and the output side outer peripheral member 76, so that the input side outer peripheral member 54 and the output side outer peripheral member are The space between the radial directions of the members 76 is sealed in a fluid-tight manner.

  In the fluid chamber 78, a part of the wall part (upper wall part) is configured by the input side rubber wall 48 that supports the piston member 52, and the other part of the wall part (lower wall part) is the output member 70. Is formed by an output-side rubber wall 50, and a fluid as a pressure medium is sealed inside. The piston member 52 is vibrated up and down by an electromagnetic actuator 84 to be described later, so that a pressure fluctuation is exerted on the fluid chamber 78. The fluid enclosed in the fluid chamber 78 is not particularly limited. However, in order to efficiently transmit the excitation force exerted on the fluid from the piston member 52 to the output member 70, an incompressible fluid is used. Desirably, for example, water, alkylene glycol, propylene glycol, ethylene glycol, polyalkylene glycol, silicone oil, or a mixture thereof is preferably employed.

  Further, a filter member 80 is disposed in the fluid chamber 78. The filter member 80 is a thin member having a substantially disk shape, and is disposed between the overlapping surfaces of the input side rubber wall 48 and the output side rubber wall 50, and the fluid chamber 78 is vertically moved by the filter member 80. It is divided into. Further, one or a plurality of filter orifices 82 are formed through the filter member 80, and the upper and lower portions of the fluid chamber 78 partitioned by the filter member 80 are communicated with each other through the filter orifice 82. .

  In addition, the vibration means 14 includes an electromagnetic actuator 84 as an actuator at the upper part of the fluid chamber 78 across the input side rubber wall 48. The electromagnetic actuator 84 has a structure in which the stator 86 and the mover 88 can be relatively displaced in the vertical direction.

  More specifically, the stator 86 has a structure in which a yoke 92 is attached to two upper and lower coils 90 and 90. The coil 90 is wound around a bobbin made of synthetic resin, and the end of the coil 90 is connected to an external power supply device 94 by a connector (not shown).

  Further, the yoke 92 is formed of a ferromagnetic material such as iron and is disposed around the coil 90. A magnetic gap 96 penetrating in the radial direction is formed in the inner peripheral portion. Both end portions sandwiching the magnetic gap 96 are the magnetic pole forming portions 98. Then, the power supply from the power supply device 94 controlled by the control device 100 to the coil 90 causes a magnetic field formed around the coil 90 to act on the magnetic pole forming portion 98 of the yoke 92 in accordance with the direction in which the coil 90 is energized. Magnetic poles are formed. The yoke 92 of this embodiment includes an upper member that is overlaid on the upper surface of the upper coil 90, a lower member that is overlaid on the lower surface of the lower coil 90, and upper and lower opposing surfaces of the upper and lower coils 90, 90. And an intermediate member superimposed on the outer peripheral surface.

  The mover 88 has a structure in which a permanent magnet 102 magnetized vertically is sandwiched between upper and lower inner yokes 104, 104. The permanent magnet 102 is formed of ferrite, neodymium, or the like and has a substantially annular plate shape, and is magnetized in the vertical direction. The inner yoke 104 has a substantially annular plate shape and is formed of a ferromagnetic material such as iron. The upper and lower inner yokes 104, 104 are superimposed on one of the upper and lower surfaces of the permanent magnet 102, so that magnetic poles corresponding to the magnetization direction of the permanent magnet 102 are formed on the outer peripheral surfaces of the upper and lower inner yokes 104, 104. Has been. The central holes of the upper and lower inner yokes 104, 104 are threaded on the inner peripheral surface, and the cylindrical connecting cylinder member 106 is screwed into the central holes of the upper and lower inner yokes 104, 104. The permanent magnet 102 and the upper and lower inner yokes 104, 104 are held in a state where they are overlapped with each other.

  The mover 88 having such a structure is inserted into the central hole of the stator 86 extending vertically, and relative displacement in the vertical direction with respect to the stator 86 is allowed. The magnetic poles are formed in the magnetic pole forming portions 98 by energizing the coils 90, 90 of the stator 86, so that a magnetic attractive force and a rejecting force act between the stator 86 and the mover 88. The mover 88 is displaced relative to the stator 86 in the vertical direction. In particular, the energization from the power supply device 94 to the coil 90 is controlled by the control device 100, so that the mover 88 is displaced up and down at a predetermined frequency with respect to the stator 86. In the present embodiment, a substantially cylindrical guide sleeve 108 extending vertically between the inner peripheral surface of the stator 86 and the outer peripheral surface of the mover 88 is provided, and the mover 88 is attached to the guide sleeve 108. On the other hand, it slides up and down and is guided up and down to prevent malfunctions such as malfunction due to contact between the mover 88 and the stator 86.

  An output shaft 110 is fixed to the mover 88. The output shaft 110 has a thread formed on the outer peripheral surface thereof, and is screwed into the connecting cylinder member 106 of the mover 88 from below. The output shaft 110 is attached to the mover 88 by a lock bolt screwed into the connecting cylinder member 106 from above. On the other hand, it is positioned at a predetermined vertical position. The output shaft 110 of the present embodiment is integrally formed with the piston member 52 and protrudes upward from the piston member 52, and the mover 88 is connected to the piston member 52 via the output shaft 110. As a result, when the mover 88 is vibrated up and down with respect to the stator 86 in the electromagnetic actuator 84, the vertical exciting force is transmitted to the piston member 52 formed integrally with the output shaft 110. The vertical exciting force exerted on the piston member 52 is exerted on the fluid chamber 78 from the piston member 52 and is transmitted to the output side rubber wall 50 via the pressure medium (encapsulated fluid) in the fluid chamber 78. Thus, the output member 70 is fixed to the output-side rubber wall 50. The relative position of the movable element 88 and the output shaft 110 in the axial direction is adjusted by rotating the movable element 88 in the axial direction with respect to the connecting cylinder member 106 screwed to the output shaft 110. Can do.

  The vibration means 14 including the electromagnetic actuator 84 having such a structure is such that the first mounting member 16 of the vibration isolation mount body 12 is connected and fixed to the output member 70 of the vibration means 14 by a connection screw 111. In this way, the anti-vibration mount main body 12 is connected to the integrated structure. The first attachment member 16 and the output member 70 are formed by overlapping the first connection piece 28 of the first attachment member 16 and the second connection piece 74 of the output member 70 in the front-rear direction. The connection screws 111 are screwed into the connection screw holes 26 and 72 to be connected and fixed to each other. The first attachment member 16 and the output member 70 are arranged side by side in the up-down direction, which is the main load input direction to the vibration-proof mount body 12, in the integrally connected and fixed state. A connecting screw 111 that connects the member 16 and the output member 70 extends in a substantially orthogonal direction (front-rear direction) with respect to the main load input direction. Note that the first mounting member 16 and the output member 70 are separate members from each other, both of which are rigid bodies, and are integrated with each other by being rigidly connected to each other.

  On the other hand, the second mounting member 18 of the vibration-proof mount body 12 and the input-side outer peripheral member 54 of the vibration means 14 are connected to each other by a bracket 112. The bracket 112 is a high-rigidity member formed of a metal such as iron or aluminum alloy, fiber-reinforced synthetic resin, or the like, and includes a pair of left and right mounting legs 116, 116 has a structure protruding downward. The lower portion of the mounting portion 114 is a mount mounting portion 118 to which the anti-vibration mount main body 12 is mounted, and the upper portion is a vibration means mounting portion 120 to which the vibration means 14 is mounted. And the vibration means mounting portion 120 are integrally provided.

  The mount mounting portion 118 is formed into a thick plate shape or block shape as a whole, and includes a mount accommodation space 122 that is opened toward the front and rear sides and accommodates the vibration isolation mount body 12. The anti-vibration mount body 12 has an open structure that can be attached by being inserted into the mount housing space 122 from the front. Further, the mount mounting portion 118 is formed with a locking portion 124 that is superimposed on the upper surface in the thickness direction of the plate-shaped portion 34 of the second mounting member 18, and the mount accommodation space 122 has a plate-shaped portion. Outer insertion portions 126 and 126 into which 34 and 34 are inserted are formed with the locking portion 124 as a part of the wall portion.

  Then, the plate-like portion 34 of the second mounting member 18 is inserted into the outer insertion portion 126 from the front to the rear, and the plate-like portion 34 is inserted into the wall inner surface of the outer insertion portion 126 (the surface of the locking portion 124 and its surface). The second attachment member 18 is attached to the bracket 112 by being sandwiched in the thickness direction by the facing surface. Thereby, the bracket 112 is attached to the vibration-proof mount main body 12, and the vibration-proof mount main body 12 is inserted and attached to the mount housing space 122 of the bracket 112 from the side (front). As described above, since the mount mounting portion 118 of the bracket 112 has an open structure to the front and rear sides, the anti-vibration mount can be mounted by slidingly mounting the anti-vibration mount main body 12 on the bracket 112 from the front and rear sides. The main body 12 can be easily attached to the bracket 112. In the present embodiment, the rear surface of the positioning piece 36 provided at the front end of the second mounting member 18 is brought into contact with and locked to the front surface of the bracket 112, so that the second mounting member 18 is moved back and forth with respect to the bracket 112. Since the vibration isolating mount main body 12 and the bracket 112 are assembled at an appropriate relative position, it can be easily realized.

  The vibration means mounting portion 120 is integrally formed continuously with the mount mounting portion 118, and includes a vibration means accommodation space 130 continuous with the mount accommodation space 122. A substantially annular caulking portion 132 is integrally formed at the upper end portion. The vibration means accommodating space 130 is opened to the front and rear sides below the caulking portion 132 and is opened upward on the inner periphery of the caulking portion 132. The output member 70 and a part of the output-side rubber wall 50 in the vibration means 14 are inserted into the inner periphery of the vibration means mounting portion 120 and the outer flange portion of the input-side outer peripheral member 54 of the vibration means 14. 62 overlaps with the caulking portion 132 of the bracket 112 in the vertical direction.

  Further, a stopper protrusion 134 that protrudes inward in the left-right direction is integrally formed at the upper part of the mount attachment part 118 or the lower part of the vibration means attachment part 120 in the bracket 112. The stopper projection 134 is disposed to face the stopper portions 32, 32 of the first mounting member 16 with a predetermined distance upward in a state where the vibration-proof mount body 12 is disposed in the mount housing space 122. Has been.

  Also, the mounting legs 116 of the bracket 112 protrude downward from the left and right ends of the mounting portion 114 as shown in FIG. 4, and extend in the front-rear direction and are implanted in the front and rear ends as shown in FIG. Bolts 136 are implanted.

  A cover member 138 is attached to the bracket 112. The cover member 138 has a substantially bottomed cylindrical shape that is upside down and has a thin wall and a large diameter, and a substantially disc-shaped elastic sheet 140 is fixed to the lower surface of the upper bottom wall portion, and at the lower end opening portion. An annular caulking piece 142 is integrally formed. The caulking piece 142 has a proximal end portion that extends in a flange shape toward the outer periphery, and a distal end portion that protrudes downward.

  The cover member 138 is disposed so as to cover the upper portion of the bracket 112, and the base end portion of the caulking piece 142 is vertically overlapped with the caulking portion 132 of the bracket 112 and the outer flange portion 62 of the vibration means 14. Yes. Then, the front end portion of the caulking piece 142 is caulked and fixed to the caulking portion 132 and the outer flange portion 62, whereby the cover member 138 is fixed to the bracket 112 and the vibration means 14 is attached to the bracket 112. It is done. As a result, the second mounting member 18 of the vibration-proof mount body 12 and the fluid chamber 78 of the vibration means 14 are integrally supported by the bracket 112.

  In the present embodiment, the input-side outer peripheral member 54 fixed to the outer peripheral end of the input-side rubber wall 48 of the vibration means 14 is applied to the bracket 112 and the cover member 138 over the entire periphery by the caulking portion 132 and the caulking piece 142. The periphery of the input side rubber wall 48 is continuously supported by the bracket 112 having a caulking portion 132 having an annular structure over the entire circumference. Further, since the output side outer peripheral member 76 fixed to the outer peripheral end of the output side rubber wall 50 is continuously fixed over the entire circumference with respect to the input side outer peripheral member 54, the bracket 112 and the cover member Indirectly fixed to 138 over the entire circumference.

  In short, the anti-vibration mount body 12 and the vibration means 14 have an integrated structure in which the first mounting member 16 of the vibration-proof mount body 12 and the output member 70 of the vibration means 14 are connected to each other. The second mounting member 18 of the vibration-proof mount body 12 and the input-side outer peripheral member 54 and the output-side outer peripheral member 76 in the vibration means 14 are connected by a bracket 112. The second mounting member 18 of the vibration isolation mount body 12 and the outer peripheral members 54 and 76 of the vibration means 14 are connected to each other by a connecting member separate from the bracket 112, and the connecting member is fixed to the bracket 112. Thus, the bracket 112 may be integrally supported.

  Further, before the bracket 112 and the cover member 138 are caulked and fixed, the input side outer peripheral member 54 of the vibration means 14 can be relatively displaced with respect to the bracket 112 in the direction perpendicular to the axis. That is, in the present embodiment, the input-side outer peripheral member 54 is located away from the inner periphery with respect to the cover member 138 including the caulking piece 142, so that the position of the vibration means 14 with respect to the bracket 112 is perpendicular to the axis. Relative displacement is possible. Accordingly, before the bracket 112 and the cover member 138 are fixed by caulking, the position of the fluid chamber 78 with respect to the bracket 112 can be adjusted in the direction perpendicular to the axis, and the second position positioned with respect to the bracket 112 is made. The position of the fluid chamber 78 with respect to the mounting member 18 can be adjusted in the direction perpendicular to the axis. Then, by caulking and fixing the bracket 112 and the cover member 138, the input side outer peripheral member 54 is fixed to the bracket 112, and the fluid chamber 78 is positioned with respect to the bracket 112 and the second mounting member 18.

  Further, the outer periphery and upper part of the vibration means 14 are covered with a cover member 138 fixed to the bracket 112, and the opening of the cover member 138 is closed fluid-tightly by the vibration means 14 and the bracket 112. This prevents foreign matter from entering the inside of the cover member 138, thereby improving the operational reliability and durability of the electromagnetic actuator 84.

  Further, the upper bottom wall portion of the cover member 138 is overlapped with the upper surface of the stator 86 of the electromagnetic actuator 84, so that the lower surface of the stator 86 is elastic with respect to the inner flange portion 60 of the input side outer peripheral member 54. It is pressed elastically through the body. Thereby, the stator 86 is sandwiched between the upper and lower walls of the cover member 138 and the inner flange portion 60 of the input side outer peripheral member 54, and the stator 86 is positioned with respect to the cover member 138 and the bracket 112. Has been.

  As shown in FIG. 5, the active vibration isolator 10 having such a structure includes a power unit 144 as a vibration isolation connection target member attached to the first attachment member 16 of the anti-vibration mount body 12 and a vehicle body. 146 is attached to the second attachment member 18 via the bracket 112. More specifically, the fastening bolt that is disposed so that the mounting portion of the power unit 144 sandwiches the mounting tube portion 24 of the first mounting member 16 in the axial direction and is inserted into the fastening bolt hole 22 of the mounting tube portion 24. The attachment cylinder portion 24 and the power unit 144 are bolted by 148. On the other hand, the vehicle body 146 is superimposed on the lower surface of the mounting leg portion 116 of the bracket 112 and is fixed to the bracket 112 by the stud bolt 136. As a result, the active vibration isolator 10 is interposed between the power unit 144 and the vehicle body 146 when the vehicle is mounted, and the power unit 144 is supported by the vehicle body 146 in an anti-vibration manner. In the active vibration isolator 10, since the shared support load of the power unit 144 acts downward when the vehicle is mounted, the main rubber elastic body 20 of the vibration isolating mount body 12 and the output side rubber wall 50 of the vibration means 14 are used. Are elastically deformed.

  When vibration in the vertical direction is input to the active vibration isolator 10 while the vehicle is mounted, when the input vibration is a low-frequency large-amplitude vibration corresponding to an engine shake or the like, the main rubber of the vibration-proof mount main body 12 When the elastic body 20 is elastically deformed, an anti-vibration effect based on internal friction of the main rubber elastic body 20 is exhibited.

  On the other hand, when the input vibration is high-frequency and small-amplitude vibration such as idling vibration or traveling booming noise, the vibration is reduced in an offset manner by the excitation force of the electromagnetic actuator 84. That is, the exciting force of the electromagnetic actuator 84 is exerted on the fluid chamber 78 by the piston member 52 having the output shaft 110 attached to the mover 88. The vertical vibration force exerted on the fluid chamber 78 is transmitted to the output side rubber wall 50 by the enclosed incompressible fluid and is exerted on the output member 70 fixed to the output side rubber wall 50. As a result, the first mounting member 16 of the vibration isolating mount body 12 that is integrated with the output member 70 is exerted. Accordingly, the vibration load input from the power unit 144 to the first mounting member 16 is reduced in an offset manner by the excitation force of the electromagnetic actuator 84 exerted from the output member 70 to the first mounting member 16. It has become. The generated excitation force of the electromagnetic actuator 84 is controlled according to the vibration load input from the power unit 144 when the power supply device 94 is controlled by feedforward control, map control, or the like of the control device 100.

  In this embodiment, when the excitation force of the electromagnetic actuator 84 is applied to the fluid chamber 78 by the piston member 52 and is transmitted to the output member 70 as the internal pressure fluctuation of the fluid chamber 78, the incompressible fluid is filtered. By flowing through 80 filter orifices 82, the filter orifice 82 is filtered and transmitted to a specific tuned frequency. In this embodiment, by considering the wall spring rigidity of the fluid chamber 78 and appropriately setting the ratio of the passage length and the passage sectional area of the filter orifice 82, the tuning frequency of the filter orifice 82 is the main input load. It is adjusted to the frequency of the vibration to be canceled, such as vibration and running noise. Thereby, the counterbalance reduction of the vibration isolation target vibration by the excitation force of the electromagnetic actuator 84 is efficiently realized, and excellent vibration isolation performance can be obtained.

  In the present embodiment, the first mounting member 16 and the output member 70 are arranged side by side in the main load input direction, and the first mounting member 16 and the output member 70 are connected to each other and integrated. Structure. Thereby, the excitation force of the electromagnetic actuator 84 is transmitted from the output member 70 to the first mounting member 16 in the main load input direction, and the main input load (vibration) can be efficiently reduced. Moreover, since the coupling mechanism between the first mounting member 16 and the output member 70 is constituted by the coupling screw 111 penetrating the first mounting member 16 and the output member 70 in the direction perpendicular to the axis, the first mounting The connection state between the first mounting member 16 and the output member 70 is stably maintained even when an axial excitation force or input vibration is repeatedly input to the connection portion between the member 16 and the output member 70. .

  In addition, the active vibration isolator 10 limits the relative displacement amount of the first mounting member 16 and the second mounting member 18 in the vibration isolating mount body 12 in the vertical direction and the horizontal direction. A stopper is provided. In other words, the bound stopper is configured such that the fixing portion 30 of the first mounting member 16 and the lower bottom wall portion of the mount accommodating space 122 in the mount mounting portion 118 of the bracket 112 abut on each other via the stopper rubber 44. The amount of relative displacement of the first mounting member 16 relative to the second mounting member 18 is limited. The rebound stopper is configured by vertically contacting the stopper portions 32 and 32 of the first mounting member 16 and the stopper protrusions 134 and 134 of the bracket 112 via the shock-absorbing rubber layer 42. The amount of relative displacement of the mounting member 16 relative to the second mounting member 18 is limited. The left and right stoppers are configured such that the left and right wall portions of the mount accommodating space 122 in the mount portions 118 of the first mounting member 16 and the mount portions 118 of the bracket 112 abut on each other via the buffer rubber layer 42. Thus, the amount of relative displacement of the first mounting member 16 to the left and right with respect to the second mounting member 18 is limited.

  According to such an active vibration isolator 10 according to the present embodiment, the main body rubber of the vibration isolating mount body 12 is provided because the vibration isolating mount body 12 and the vibration means 14 are substantially independent structures. The spring characteristics of the elastic body 20 and the spring characteristics of the rubber walls 48 and 50 of the vibration means 14 can be set independently. Therefore, the vibration isolation characteristics required for the vibration isolation mount body 12 and the vibration isolation characteristics required for the vibration means 14 can be realized at high levels, respectively, and excellent vibration isolation performance can be obtained. Can do.

  Further, the first mounting member 16 of the vibration-proof mount body 12 and the output member 70 of the vibration means 14 are connected to each other to form an integral structure, and the second mounting member 18 of the vibration-proof mount body 12. The fluid chamber 78 of the vibration means 14 is integrally supported by the bracket 112. As a result, the pressure fluctuation exerted on the fluid chamber 78 by the excitation force of the electromagnetic actuator 84 is exerted on the first mounting member 16 via the output member 70 and input from the power unit 144 to the first mounting member 16. The vibration to be performed is reduced in an offset manner by the exciting force of the electromagnetic actuator 84.

  Furthermore, the first mounting member 16 of the vibration-proof mount body 12 and the output member 70 of the vibration means 14 are formed as separate members, and are fixed to each other by a connecting screw 111 as a connecting mechanism and integrated structure. It is said that. Therefore, the vibration-proof mount body 12 and the vibration means 14 can be easily manufactured, and the vibration-proof mount body 12 and the vibration means 14 can be easily assembled to the bracket 112 and the cover member 138.

  Moreover, for example, either one of the vibration-proof mount body 12 and the vibration means 14 can be used in common, and either one of the vibration-proof mount body 12 and the vibration means 14 can be appropriately selected from a plurality of types having different structures. By doing so, it is possible to efficiently respond to various requests. When any one of the vibration isolating mount main body 12 and the vibrating means 14 can be selected from a plurality of types having different structures, not only the connection structure with the first mounting member 16 or the output member 70 but also the bracket 112. By making the connection structure to the common, the bracket 112 and the cover member 138 can be made common.

  Further, the vibration means 14 of this embodiment has a structure in which the input side rubber wall 48 and the output side rubber wall 50 are overlapped, and a fluid chamber 78 is provided between the overlapping surfaces of the rubber walls 48 and 50. The liquid-sealed structure is formed. Therefore, the piston member 52 fixed to the input side rubber wall 48 and connected to the mover 88 of the electromagnetic actuator 84, and the first mounting member 16 of the vibration isolation mount body 12 fixed to the output side rubber wall 50. Since the output chamber 70 connected to is allowed to be displaced by the fluid chamber 78 due to an error in part dimensions, the relative position between the vibration isolating mount body 12 and the vibration exciting means 14 can be set with high accuracy. There is no need to match, and the vibration-proof mount body 12 and the vibration means 14 can be easily assembled. In other words, since the relative displacement in the direction perpendicular to the axis of the piston member 52 and the output member 70 is allowed by the fluid chamber 78, the stator 86 and the mover 88 are positioned with high accuracy in the direction perpendicular to the axis. The electromagnetic actuator 84 that needs to be used can be employed, and the electromagnetic actuator 84 can efficiently generate the excitation force corresponding to the input vibration.

  Further, the output-side outer peripheral member 76 fixed to the outer peripheral end portion of the output-side rubber wall 50 is press-fit fluidly and connected to the input-side outer peripheral member 54 fixed to the outer peripheral end portion of the input-side rubber wall 48. As a result, the outer peripheral portion of the fluid chamber 78 is sealed. The vibration chamber 14 of the vibration means 14 can be formed by such a simple sealing structure because the vibration means 14 has a structure substantially independent of the vibration isolation mount body 12.

  In addition, the upper end portion of the vibration means mounting portion 120 in the bracket 112 is an annular caulking portion 132, and the caulking piece 142 of the cover member 138 is caulked and fixed to the caulking portion 132 over the entire circumference. The outer peripheral end of the fluid chamber 78 is sealed with higher reliability. In addition, the cover member 138 and the bracket 112 are continuously fixed over the entire circumference, so that the electromagnetic actuator 84 that generates the excitation force, the input side rubber wall 48 that is applied with the excitation force, and the output side The rubber wall 50 is stably supported by the bracket 112 and the cover member 138, and the operation reliability and stability can be realized.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the anti-vibration mount body of the above embodiment has a convex type structure that obtains an anti-vibration effect based on the characteristics of the rubber elastic body. However, for example, a fluid action such as resonance of a fluid sealed inside is used. Thus, it is possible to employ a fluid-filled vibration isolator that improves the vibration isolating effect.

  In addition, the structure of the actuator shown in the above embodiment is merely an example, and actuators having different structures can be appropriately employed. Specifically, in the above-described embodiment, the electromagnetic actuator 84 having a structure that generates an excitation force by energizing the upper and lower two-stage coils 90, 90 in the opposite direction has been illustrated, but for example, Japanese Patent No. 5641525 As described above, an electromagnetic actuator that generates an excitation force by the action of a magnetic field generated by energization of one coil can be employed.

  Furthermore, a pneumatic actuator can be employed as the actuator. That is, a working air chamber as a pressure control chamber sealed from the outside is defined above the output-side rubber wall 50, and the working air is sucked in or pumped into the working air chamber. By providing a pump that adjusts the pressure in the room and a control device that controls the pump, and controlling the internal pressure adjustment of the working air chamber by the pump according to the input vibration, it is possible to reduce the input vibration in an offset manner Can be.

  Moreover, the specific structure of the connection mechanism between the first attachment member and the output member is not limited to the connection screw, and the first attachment member and the output member can be connected with a rivet. Furthermore, it can also connect by pressing-in the attachment rod which protrudes from one of the 1st attachment member and an output member to the attachment hole opened to the other. Furthermore, the first mounting member and the output member can be connected to each other by a connecting mechanism such as welding, welding, adhesion, or mechanical engagement. In addition, the first mounting member and the output member are not necessarily limited to separate members, and may be an integrated structure including a single member in which the first mounting member and the output member are integrally formed.

  In the embodiment, the bracket 112 which is a member different from the second mounting member 18 is illustrated, but the second mounting member and the bracket may be configured by a common member. In the present invention, the bracket is not an essential member. For example, the second attachment member may be directly attached to the vehicle body, or the outer peripheral member of the vibration means is directly attached to the vehicle body or another member. It is also possible to attach and support them integrally.

  Moreover, the attachment structure to the vehicle of an active vibration isolator is an illustration to the last, and is not limited. As a mounting structure to the vehicle, for example, a bolt hole may be formed in the mounting leg portion of the bracket, and the bracket may be attached to the vehicle body with a bolt inserted into the bolt hole. The inner bracket may be fixed to the power unit, and the inner bracket may be fixed to the power unit with a bolt or a mechanical locking structure.

10: Active vibration isolator, 12: Anti-vibration mount main body, 14: Excitation means, 16: First attachment member, 18: Second attachment member, 20: Rubber elastic body, 26: First connection Screw hole (connection mechanism), 28: first connection piece (connection mechanism), 48: input side rubber wall, 50: output side rubber wall, 52: piston member, 70: output member, 72: second connection screw Hole (connection mechanism), 74: second connection piece (connection mechanism), 78: fluid chamber, 84: electromagnetic actuator, 110: output shaft, 111: connection screw (connection mechanism), 112: bracket, 118: Mount mounting portion, 120: vibration means mounting portion, 138: cover member

Claims (6)

An anti-vibration mount body in which the first mounting member and the second mounting member are connected by a rubber elastic body;
A pressure control chamber filled with a pressure medium and subjected to pressure fluctuation by an actuator, and an excitation means in which an output member is elastically supported by a rubber wall of the pressure control chamber.
The first mounting member of the vibration-proof mount body and the output member of the vibration means are integrated, and the second mounting member of the vibration-proof mount body and the vibration means An active vibration isolator, wherein the pressure control chamber is integrally supported.   2. The active vibration isolator according to claim 1, wherein the first mounting member of the vibration isolating mount body and the output member of the vibration exciting unit which are separate members are integrated with each other by a coupling mechanism.   In the bracket for integrally supporting the second mounting member of the vibration-proof mount body and the pressure control chamber of the vibration means, the second mounting member and the pressure control chamber are The active vibration isolator according to claim 1 or 2, wherein the position can be adjusted with respect to each other in a direction orthogonal to a direction of vibration by the output member of the means.   The first mounting member in the vibration isolating mount body is provided with the output member of the vibration means having an integral structure in a linear direction outward in a main load input direction, and the vibration by the output member The active vibration isolator according to any one of claims 1 to 3, wherein a force is exerted in a main load input direction of the first mounting member. The mount mounting portion to which the vibration-proof mount body is mounted and the vibration means mounting portion to which the vibration means is mounted have a bracket provided integrally,
While the mount mounting portion in the bracket has a lateral open structure, the vibration isolation connection target member can be attached to the first mounting member from the side,
5. The vibration means mounting portion has an annular structure that supports the periphery of the rubber wall, and a cover member that covers the vibration means is attached to the vibration means mounting portion. The active vibration isolator according to any one of claims. The vibration means includes a fluid in which an input side rubber wall and an output side rubber wall are overlapped and connected to each other at an outer peripheral portion, and an incompressible fluid is sealed between the overlapping surfaces of the rubber walls. It has a liquid-sealed structure with a chamber,
A piston member to which an output shaft of an electromagnetic actuator disposed outside the input side rubber wall is connected is fixed to the central portion of the input side rubber wall, while the output side rubber wall is fixed to the central portion of the output side rubber wall. The active vibration isolator according to any one of claims 1 to 5, wherein the output member is fixed.

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