JP2010112477A - Damping device and manufacturing method of damping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping device which stabilizes a posture when a valve body is deformed in bend by preventing the valve body from shaking in a width direction of the valve body with respect to an attached section. <P>SOLUTION: The damping device includes an outer tube connected to either of vibration generating section and vibration receiving section, an inner tube connected to the other side, and partitioning member 16 which partitions an elastic body elastically connecting these both tubes and liquid chamber within the outer tube into one side main liquid chamber 17 and the other side sub liquid chamber, wherein: a restraint channel 22 communicating with these both liquid chambers is formed; a valve body 28, in which a longitudinal one end is fixed within the outer tube, and the other end is elastically deformed in bend by receiving a fluid pressure of the main liquid chamber or sub liquid chamber, is arranged within the outer tube; the longitudinal one end of this valve body is fixed to an attached section 30 formed within the outer tube by a plurality of fixing member 36 sandwiching the valve body and this attached section from both sides of the valve body in plate thickness direction; and at least two among the plurality of fixing member are mutually shifted in the longitudinal direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration isolator that is applied to, for example, automobiles, industrial machines, and the like and absorbs and attenuates vibrations of a vibration generating unit such as an engine, and a method of manufacturing the vibration isolator.

As this type of vibration isolator, as shown in Patent Document 1 below, an outer cylinder connected to one of the vibration generating part and the vibration receiving part, an inner cylinder connected to the other, and both these cylinders And a partition member that divides the liquid chamber in the outer cylinder into a main liquid chamber on one side and a sub liquid chamber on the other side, the elastic body being a part of the wall surface. The configuration is known.
The partition member is provided with a cylindrical partition member main body, and a restriction passage that connects the main liquid chamber and the sub liquid chamber is formed on the outer peripheral surface of the partition member main body. In addition, the liquid sealed in the liquid chamber passes between the main liquid chamber and the sub liquid chamber through the restriction passage. Then, liquid column resonance occurs in the liquid flowing through the restriction passage, and the vibration is attenuated.

Further, the partition member main body has a restriction passage and a main liquid at a position away from the main liquid chamber side communication port of the restriction passage opening to the main liquid chamber toward the sub liquid chamber side along the flow direction of the restriction passage. A halfway opening communicating with the chamber is formed, and a valve body for opening and closing the halfway opening is provided. This valve body is a leaf spring curved in an arcuate shape, and one side in the length direction thereof is attached to a mounted portion formed on the partition member body, and the valve body and the mounted portion are placed on the plate thickness of the valve body. It is fixed by two fixing members sandwiched from both sides in the direction. In addition, these two fixing members are provided along the width direction of the valve body orthogonal to the length direction.
In this vibration isolator, the valve body that receives the fluid pressure in the fluid chamber at the time of vibration input is elastically deformed to open and close the opening partway and change the flow path length of the restriction passage.
JP 2007-239824 A

  However, in the conventional vibration isolator, since the two fixing members are provided along the width direction, the other side of the length direction of the valve body is likely to rattle in the width direction, and the valve body is There is a fear that the posture when it is bent and deformed becomes difficult to stabilize.

  The present invention has been made in view of the above-described circumstances, and the object thereof is to suppress the valve body from rattling in the width direction of the valve body with respect to the mounted portion, and the posture when the valve body is deformed by deformation. It is to provide a vibration isolator capable of stabilizing the vibration isolator, and a method of manufacturing the vibration isolator capable of easily manufacturing the vibration isolator in a short time.

In order to solve the above problems, the present invention proposes the following means.
An anti-vibration device according to the present invention includes an outer cylinder connected to one of a vibration generating part and a vibration receiving part, an inner cylinder connected to the other, and an elastic body elastically connecting these two cylinders. A partition member that divides the liquid chamber in the outer cylinder into a main liquid chamber on one side and a sub liquid chamber on the other side, the elastic body being a part of a wall surface, and both of these liquid chambers A liquid-filled vibration isolator in which a restriction passage is formed to communicate with each other, wherein one end in the length direction is a fixed end inside the outer cylinder, and the other end is the main liquid chamber or the sub-liquid. A valve body that is elastically bent and deformed by receiving the fluid pressure of the chamber is disposed, and one end of the valve body in the longitudinal direction is attached to a mounted portion formed inside the outer cylinder and the valve body and The mounting portion is fixed by a plurality of fixing members that sandwich the valve body from both sides in the plate thickness direction, and a small number of the plurality of fixing members is fixed. Kutomo two is characterized in that are provided offset from one another wherein the lengthwise direction.

  According to the vibration isolator according to the present invention, the two fixing members are provided so as to be shifted from each other in the length direction, and therefore, the fixing member located on one side of the length direction among these fixing members. In the width direction of the valve body with a fixing member located on the other side of the length direction among these fixing members, while suppressing rattling on the one side in the width direction of the valve body orthogonal to the length direction. Shaking on the other side can be suppressed. In addition, it is possible to secure a wide area in the length direction that is fixed by the fixing member in the valve body. As described above, rattling in the width direction with respect to the mounted portion of the valve body can be suppressed, and the posture of the valve body when the valve body is deformed can be stabilized.

  Further, in the vibration isolator according to the present invention, in each of the valve body and the mounted portion, the surfaces that contact each other are formed as a flat surface, and the back surface opposite to the surface is a flat surface parallel to the surface. It is preferably formed on the surface.

In this case, since the surfaces that contact each other in the valve body and the mounted portion are formed as flat surfaces, for example, the assembly of the valve body and the mounted portion is compared with the case where each surface is formed in a curved surface or the like. The accuracy can be easily and reliably stabilized, and the posture of the valve body during the bending deformation can be further stabilized.
Further, since the back surface is formed in a flat surface parallel to the front surface in each of the valve body and the mounted portion, the valve body and the mounted portion are fixed by sandwiching the valve body and the mounted portion from both sides in the plate thickness direction. Fixing of the valve body and the mounted portion by the member can be strengthened, and rattling of the valve body with respect to the mounted portion can be further suppressed.

  In the vibration isolator according to the present invention, the valve element may bend and deform so that the restriction passage can be narrowed when a load is input in a direction in which the liquid pressure in the main liquid chamber increases. preferable.

In this case, when a load (hereinafter referred to as “positive load”) in the direction of increasing the hydraulic pressure in the main liquid chamber is input to the vibration isolator and the valve body narrows the restriction passage, the flow resistance of the restriction passage increases. Therefore, the restricted passage is clogged. As a result, it becomes difficult for the liquid to flow from the main liquid chamber into the restriction passage, and the positive pressure in the main liquid chamber increases. Therefore, even if a load in the direction in which the hydraulic pressure in the main liquid chamber decreases thereafter (hereinafter referred to as “load weight”) is input, it is possible to suppress the negative pressure in the main liquid chamber from increasing. It is possible to suppress cavitation in which a part of the liquid in the liquid chamber is vaporized and bubbles are generated.
Further, since the valve body is constricted without closing the restriction passage, the valve body does not collide with another member, and abnormal noise due to the collision and rattling of the mounted part of the valve body are generated. Can be prevented.
In addition, as described above, since the posture of the valve body when it is bent and deformed is stabilized, it is possible to reliably prevent the valve body from inadvertently colliding with another member, and the degree of narrowing of the restriction passage by the valve body. Can be stabilized, and the hydraulic pressure at which the valve body constricts the restriction passage can be made highly accurate. Thereby, for example, it is possible to easily prevent the valve body from constricting the restriction passage during shake vibration, and it is possible to prevent the attenuation performance from being lowered.

In the conventional vibration isolator described in Patent Document 1, even when a large positive load is input, the liquid flows from the main liquid chamber into the restriction passage without being restricted, The positive pressure in the main fluid chamber does not increase. Therefore, after that, when a large load weight is input, the negative pressure in the main liquid chamber increases, and there is a limit in suppressing the occurrence of cavitation.
Further, in the conventional vibration isolator, the valve body bends and deforms due to the load weight input when the shake vibration is input, and the restriction passage communicates with the main liquid chamber through the halfway opening, and the liquid column resonance frequency of the restriction passage May change, and the damping performance against shake vibration may not be sufficiently exhibited.

  In the vibration isolator according to the present invention, the partition member includes a cylindrical partition member main body, and the restriction passage is formed on an outer peripheral surface of the partition member main body and along a circumferential direction thereof. An opening on at least one end of both end openings of the restriction passage that extends and opens separately to the main liquid chamber and the sub liquid chamber is formed on an inner peripheral surface of the partition member body and the Opened to the main liquid chamber side, and the mounted portion is located in a part of the partition member body that is continuous from the sub liquid chamber side along the flow path direction of the restriction passage to the opening on one end side of the restriction passage. Preferably it is.

In this case, the restriction passage is formed on the outer peripheral surface of the partition member main body and extends along the circumferential direction, and the attached portion is in the flow direction in the opening on one end side of the restriction passage in the partition member main body. Since the liquid flows between the main liquid chamber and the sub liquid chamber through the opening on one end side of the restriction passage, the liquid flow is disturbed. It is difficult and the liquid easily passes through the opening on one end side of the restriction passage. Therefore, it is possible to suppress a decrease in the damping performance due to the provision of the valve body.
In addition, when all the fixing members are arranged in a line along the length direction, it is possible to reduce the exclusive space along the width direction of the fixing members, and in recent years, there has been a demand for a compact vibration isolator. Accordingly, for example, even if the flow path width of the restriction passage is narrowed, each end portion of the plurality of fixing members can be easily positioned in the restriction passage.

  The vibration isolator manufacturing method according to the present invention is a manufacturing method for manufacturing the vibration isolator according to the present invention, wherein a rivet is used as the fixing member, and the outer cylinder and the inner cylinder are elastic. A main body rubber member forming step of forming a main body rubber member connected by a body, a valve body fixing step of fixing the valve body to the partition member main body, and assembling at least the partition member to the main body rubber member; An assembling step for sealing the inside of the outer cylinder and partitioning the main liquid chamber and the sub liquid chamber to form a vibration isolator, and in the valve body fixing step, the rivet is attached to the valve body. And, the valve body is fixed to the partition member main body by driving a plurality of parts simultaneously from the outside in the radial direction of the partition member main body to the mounted portion.

  According to the manufacturing method of the vibration isolator according to the present invention, since the rivet is used as the fixing member, the valve body and the mounted portion can be easily fixed. Furthermore, during the valve body fixing process, the rivet is driven into the valve body and the mounted portion from the outside in the radial direction. Both can be fixed more easily while suppressing the above. In addition, since a plurality of rivets are driven at the same time, the valve body and the mounted portion can be fixed in a short time.

According to the vibration isolator which concerns on this invention, it can suppress that a valve body shakes in the width direction of a valve body with respect to a to-be-mounted part, and can stabilize the attitude | position at the time of a bending deformation of a valve body.
Moreover, according to the manufacturing method of the vibration isolator which concerns on this invention, the said vibration isolator can be manufactured easily and in a short time.

Hereinafter, an embodiment of a vibration isolator according to the present invention will be described with reference to FIGS. 1 and 2. The vibration isolator 1 is an engine mount that supports an engine that is a vibration generating unit in an automobile to a vehicle body that is a vibration receiving unit.
As shown in FIG. 1, the vibration isolator 1 includes an outer cylinder 2, an inner cylinder 3 that is formed in a columnar shape and disposed inside the outer cylinder 2 in a radial direction, and both the cylinders 2 and 3 are elastically connected. The elastic body 4 to be provided.

  In the example shown in the figure, the outer cylinder 2 and the inner cylinder 3 are arranged with their respective central axes positioned on a common axis. Hereinafter, this common axis is referred to as an axis O. Further, the lower side of the paper surface of FIG. 1 is the bounce side, that is, the direction in which a static load (initial load) is input when the vibration isolator 1 is installed, and the upper side of the paper surface of FIG. 1 is the rebound side, that is, the static load. The opposite side of the input direction. In the following description, the bound side is referred to as the lower side, and the rebound side is referred to as the upper side.

  The outer cylinder 2 is formed with a cylindrical large-diameter portion 5 at the upper end portion and a cylindrical small-diameter portion 6 having a smaller diameter than the large-diameter portion 5 at the lower end side. Between the large-diameter portion 5 and the small-diameter portion 6, a narrowed portion 7 that is reduced inward in the radial direction is formed over the entire circumference. The small diameter portion 6 is fitted inside a cylindrical portion of a vehicle body side bracket (not shown), and the outer cylinder 2 is fixed to the vehicle body side via the vehicle body side bracket.

  The inner cylinder 3 extends along the axis O direction and is disposed above the outer cylinder 2. The lower part of the inner cylinder 3 has a tapered shape that is gradually reduced in diameter as it goes downward. Further, a screw hole 3 a extending from the center of the upper end surface of the inner cylinder 3 toward the lower side in the axis O direction is formed in the upper part of the inner cylinder 3. A bolt 3b of an engine side bracket (not shown) is screwed and fixed in the screw hole 3a, and the inner cylinder 3 is fixed to the engine side via the engine side bracket. An anchor portion 8 that protrudes outward in the radial direction is formed at an intermediate portion of the inner cylinder 3 in the axis O direction.

  The elastic body 4 is an elastic body made of vulcanized rubber and closes the upper opening of the outer cylinder 2. In the illustrated example, the outer peripheral surface of the lower portion of the elastic body 4 is vulcanized and bonded to the large diameter portion 5 of the outer cylinder 2 and the inner peripheral surface of the throttle portion 7. Further, in the illustrated example, a concave portion that opens upward and extends downward in the direction of the axis O is formed in the upper portion of the elastic body 4, and the inner peripheral surface of this concave portion is the lower end of the inner cylinder 3. It is vulcanized and bonded to the outer peripheral surface of the part.

  An inner ring 9 disposed between the outer cylinder 2 and the inner cylinder 3 is embedded in the elastic body 4. A rubber cover 10 that covers the anchor portion 8 is integrally formed at the upper end of the elastic body 4, and a rebound stopper is formed by the rubber cover 10 and the anchor portion 8. Further, a rubber film 11 covering the inner peripheral surface of the small diameter portion 6 is integrally formed at the lower end portion of the elastic body 4. In addition, as the elastic body 4, it is also possible to use an elastic body made of synthetic resin or the like in addition to rubber.

  The vibration isolator 1 is provided with a diaphragm 12 that closes the lower opening of the outer cylinder 2. In the illustrated example, the diaphragm 12 is fitted into the small-diameter portion 6 of the outer cylinder 2, and includes a diaphragm ring 13 formed in a cylindrical shape, and a diaphragm rubber 14 that closes the inside of the diaphragm ring 13. ing. The diaphragm rubber 14 is formed in a bowl shape, and the outer edge portion thereof is vulcanized and bonded to the inner peripheral surface of the diaphragm ring 13. In the illustrated example, the diaphragm 12 is fixed by crimping the lower end portion of the diaphragm ring 13 and the lower end portion of the small diameter portion 6 of the outer cylinder 2 radially inward over the entire circumference. . The rubber film 11 is interposed between the outer peripheral surface of the diaphragm ring 13 and the inner peripheral surface of the small diameter portion 6 of the outer cylinder 2. Thereby, the watertightness is ensured in the fitting part of the diaphragm ring 13 and the outer cylinder 2.

In addition, a liquid chamber 15 that is partitioned from the outside by an elastic body 4 and a diaphragm 12 and filled with a liquid such as ethylene glycol or water is provided inside the outer cylinder 2. The liquid chamber 15 is divided into an upper main liquid chamber 17 and a lower sub liquid chamber 18 by a partition member 16 disposed inside the outer cylinder 2.
The main liquid chamber 17 has the elastic body 4 as a part of the partition wall, and the internal volume changes due to the deformation of the elastic body 4. The sub liquid chamber 18 is formed so that a part of the partition wall can be deformed. In the present embodiment, a part of the partition wall of the sub liquid chamber 18 is constituted by the diaphragm 12, and the diaphragm rubber 14 of the diaphragm 12 is deformed according to a change in the fluid pressure, and the internal volume of the sub liquid chamber 18 is increased. Can be scaled.
The partition member 16 is fitted inside the small diameter portion 6 of the outer cylinder 2. The partition member 16 includes a cylindrical partition member main body 19, and a restriction passage 22 that connects the main liquid chamber 17 and the sub liquid chamber 18 is formed on the outer peripheral surface of the partition member main body 19. Furthermore, the partition member 16 includes a membrane 20 disposed below the partition member main body 19 and a membrane housing member 21 that houses the membrane 20.

The restriction passage 22 extends along the circumferential direction of the partition member main body 19 as shown in FIGS. The restriction passage 22 is closed by the rubber film 11 from the outside in the radial direction of the partition member main body 19 by fitting the partition member 16 inside the outer cylinder 2. Further, as shown in FIG. 2, at least one of the both end openings 24, 25 of the restriction passage 22 that opens to the main liquid chamber 17 and the sub liquid chamber 18 is formed in the partition member main body 19. It is formed on the peripheral surface. In the illustrated example, the main liquid chamber side communication port (opening portion on one end side of the restriction passage) 24 that opens to the main liquid chamber 17 has an inner periphery of the partition member main body 19 that constitutes a part of the partition wall of the main liquid chamber 17. A sub liquid chamber side opening 25 formed in the surface and opening into the sub liquid chamber 18 is formed in the bottom plate portion 19 a of the partition member main body 19.
The restriction passage 22 described above is a shake orifice corresponding to shake vibration in the vehicle, and the flow path length and flow passage cross-sectional area (that is, flow passage resistance) of the restriction passage 22 are the vibration frequency (for example, about 8 to 12 Hz). ) Is set (tuned) so that liquid column resonance occurs.
A plurality of through holes 26 are formed in the bottom plate portion 19 a of the partition member main body 19.

As shown in FIG. 1, the membrane housing member 21 is formed in a bottomed cylindrical shape and is arranged coaxially with the axis O, and a flange portion 21b is formed at the upper end of the peripheral wall portion 21a toward the outer side in the radial direction. It is extended. In the illustrated example, this flange portion 21 b is fixed to the outer peripheral portion of the bottom plate portion 19 a of the partition member main body 19 with screws or the like. A through hole (not shown) is formed in a portion of the flange portion 21 b corresponding to the sub liquid chamber side opening 25 of the partition member main body 19. A plurality of through holes 27 are formed in the bottom plate portion 21 c of the membrane housing member 21.
The membrane 20 is an elastically deformable disc-shaped rubber plate, and is surrounded by a bottom plate portion 19 a of the partition member main body 19, a peripheral wall portion 21 a of the membrane housing member 21, and a bottom plate portion 21 c of the membrane housing member 21. Contained in space.

  Further, as shown in FIG. 2, the partition member main body 19 is provided with a plate-like valve body 28 disposed in the main liquid chamber side opening 24. In the illustrated example, the valve body 28 is a leaf spring made of a thin metal plate such as stainless steel, and can be elastically bent and deformed in the plate thickness direction. In addition, the valve body 28 has one side in the length direction fixed to the mounted portion 30 of the partition member main body 19, and the other side in the length direction receives the hydraulic pressure of the main liquid chamber 17, so that the radius is increased. It is configured to bend and deform elastically in the direction.

  In the present embodiment, the mounted portion 30 is located in a portion of the partition member main body 19 that is continuous with the main liquid chamber side opening 24 from the sub liquid chamber 18 side along the flow path direction of the restriction passage 22. In the illustrated example, a fixing portion 29, which is a portion located on one side in the length direction of the valve body 28, is fixed to a surface facing the inner side in the radial direction in the mounted portion 30. Note that the surface facing the inner side in the radial direction in the mounted portion 30 is a part of the inner peripheral surface of the partition member main body 19.

  Further, the movable portion 31 which is a portion located on the other side in the length direction in the valve body 28 is curved toward the outside in the radial direction, and has an arc shape in a plan view of the partition member 16. It extends from the mounted portion 30 toward the main liquid chamber side opening 24 side. That is, the valve body 28 is arranged so that the length direction coincides with the flow path direction. In the illustrated example, the movable portion 31 is located on the inner side in the radial direction with respect to the inner peripheral surface of the partition member main body 19 at a normal time when vibration is not input to the vibration isolator 1. When a positive load is input, the end on the main liquid chamber 17 side in the flow path direction of the restriction passage 22 is narrowed as shown by a two-dot chain line in the figure. As can be seen, it bends and deforms outward in the radial direction.

In addition, the surfaces 32 and 33 that are in contact with each other in the fixing portion 29 and the mounted portion 30 are formed as flat surfaces. Hereinafter, the surface 32 in the fixing portion 29 is referred to as a mounting surface 32, and the surface 33 in the mounted portion 30 is referred to as a mounting surface 33. In the illustrated example, the mounting surface 32 and the mounting surface 33 are formed on a plane perpendicular to the vertical plane of the axis O.
In addition, a first fixed surface 34, which is a back surface opposite to the mounting surface 32 in the fixing portion 29, is formed on a flat surface parallel to the mounting surface 32, and is opposite to the mounting surface 33 in the mounting portion 30. A second fixed surface 35 as a back surface is formed on a flat surface parallel to the mounting surface 33. As a result, the first fixed surface 34 and the second fixed surface 35 are flat surfaces parallel to each other. The second fixed surface 35 is a part of the wall surface that defines the restriction passage 22.
The fixing portion 29 of the valve body 28 is fixed to the mounted portion 30 by a plurality of rivets (fixing members) 36 that sandwich the valve body 28 and the mounted portion 30 from both sides in the plate thickness direction. In the illustrated example, two rivets 36 are provided.

  In the present embodiment, these two rivets 36 are provided so as to be shifted from each other in the length direction. In the illustrated example, the rivets 36 are provided at intervals in the length direction. Further, as shown in FIG. 1, the rivets 36 are arranged in a line along the length direction. The interval between the adjacent rivets 36 is such that when the rivet 36 is driven, the portion of the valve body 28 positioned at this interval and the portion of the mounted portion 30 positioned at this interval do not crack. Yes.

Next, the manufacturing method of the vibration isolator 1 comprised as mentioned above is demonstrated.
First, a main body rubber member forming step for forming a main body rubber member 40 in which the outer cylinder 2 and the inner cylinder 3 are connected by the elastic body 4 is performed.
More specifically, first, an adhesive base treatment is applied to the inner peripheral surface of the outer cylinder 2, the outer peripheral surface of the inner cylinder 3, and the surface of the inner ring 9, and then both the cylinders 2, 3 and the inner ring 9 are attached. Each is placed in a mold (not shown). Next, after injecting unvulcanized rubber into the mold to integrally form the molded body of the elastic body 4, the molded body of the rubber cover 10 and the molded body of the rubber film 11, these are heated. Then, the elastic body 4, the rubber cover 10 and the rubber film 11 are integrally formed. At this time, the elastic body 4 is bonded to the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 3 with the inner ring 9 embedded therein, and the rubber cover 10 is bonded to the anchor portion 8. The rubber film 11 is bonded to the inner peripheral surface of the outer cylinder 2 to form the main body rubber member 40.

Further, a valve body fixing step of fixing the valve body 28 to the partition member main body 19 is performed.
Specifically, first, the fixing portion 29 of the valve body 28 is arranged on the mounted portion 30 of the partition member main body 19 so that the mounting surface 32 and the mounted surface 33 are in contact with each other. At this time, a rivet insertion hole through which the rivet 36 is inserted in a direction perpendicular to the first fixing surface 34 or the second fixing surface 35 (the plate thickness direction) is provided in each of the fixing portion 29 and the mounted portion 30. Are formed in advance at the positions corresponding to the number. Then, while the mounting surface 32 and the mounting surface 33 are brought into contact with each other, the rivet insertion hole formed in the fixing portion 29 is positioned with respect to the rivet insertion hole formed in the mounting portion 30 to fix the fixing portion 29. Is disposed on the mounted portion 30. The rivet insertion hole may be formed after the fixing portion 29 is disposed in the mounted portion 30.

  Next, the rivet 36 is driven and the valve body 28 is fixed to the mounted portion 30. At this time, a plurality of rivets 36 are simultaneously driven into the valve body 28 and the mounted portion 30 from the outside in the radial direction. Specifically, using a driving jig or the like (not shown), all the rivets 36 are moved from the second fixed surface 35 side, which is a surface facing the outside in the radial direction, in the mounted portion 30, in the restriction passage 22. Drive simultaneously through the radially outward open part. At this time, in the present embodiment, since the first fixing surface 34 and the second fixing surface 35 are formed as flat surfaces parallel to each other, the driving direction of all the rivets 36 is set in a direction orthogonal to the second fixing surface 35. It is possible to drive by matching, and the driving can be performed easily. Thus, the valve body 28 is fixed to the partition member main body 19.

In addition, a diaphragm forming process is performed for forming the diaphragm 12 in which the diaphragm rubber 14 is disposed inside the diaphragm ring 13.
More specifically, after the adhesive base treatment is performed on the inner peripheral surface of the diaphragm ring 13, the diaphragm ring 13 is disposed in a mold (not shown) for forming the diaphragm rubber 14. Next, after unvulcanized rubber is injected into the mold to form a molded body of the diaphragm rubber 14, this is heated and vulcanized to form the diaphragm rubber 14. At this time, the outer peripheral edge of the diaphragm rubber 14 is bonded to the inner peripheral surface of the diaphragm ring 13 to form the diaphragm 12.

Next, an assembling process for assembling the vibration isolator 1 by assembling the partition member 16 and the diaphragm 12 to the main rubber member 40 is performed.
More specifically, first, the partition member main body 19 and the membrane housing member 21 are fitted into the outer cylinder 2 of the main body rubber member 40 while the membrane 20 is housed in the membrane housing member 21, so that the main body rubber is fitted. The partition member 16 is assembled to the member 40. Next, after the diaphragm ring 13 of the diaphragm 12 is fitted in the lower opening of the outer cylinder 2 of the main rubber member 40, the lower end of the outer cylinder 2 is bent inward in the radial direction over the entire circumference. By crimping, the diaphragm 12 is assembled to the main rubber member 40. As described above, the partition member 16 and the diaphragm 12 are assembled to the main rubber member 40, and the inside of the outer cylinder 2 is sealed and partitioned into the main liquid chamber 17 and the sub liquid chamber 18.
The liquid can be sealed in the outer cylinder 2 by using, for example, a vacuum injection method after the assembling process, or the main rubber member 40 in the pool filled with the liquid during the assembling process. Alternatively, the partition member 16 and the diaphragm 12 may be assembled to each other.
As described above, the vibration isolator 1 is formed.

  According to the manufacturing method of the vibration isolator 1 described above, since the rivet 36 is used as the fixing member, the valve body 28 and the mounted portion 30 can be easily fixed. Further, since the rivet 36 is driven into the valve body 28 and the mounted portion 30 from the outside in the radial direction during the valve body fixing step, it is difficult for space constraints to occur during the operation, and the valve body 28 and the mounted portion are prevented. 30 can be fixed more easily. In addition, since a plurality of rivets 36 are driven simultaneously, the valve body 28 and the mounted portion 30 can be fixed in a short time.

Next, the operation of the vibration isolator 1 having the above-described configuration will be described.
The vibration isolator 1 includes an inner cylinder 3 connected to an engine (not shown) via an engine side bracket (not shown), and an outer cylinder 2 connected to the vehicle body via a vehicle body side bracket (not shown). By being connected to (not shown), it is interposed between the engine and the vehicle body.
At this time, a downward static load (engine load) acts on the vibration isolator 1, the inner cylinder 3 moves downward and the elastic body 4 elastically deforms downward, and the elastic body 4 is elastically deformed. As a result, the internal volume of the main liquid chamber 17 is reduced and the liquid pressure in the main liquid chamber 17 is increased. At this time, an internal pressure difference is generated between the main liquid chamber 17 and the sub liquid chamber 18, and the liquid in the main liquid chamber 17 passes through the restriction passage 22 and the aforementioned through holes 26 and 27 due to the internal pressure difference. As a result, the diaphragm 12 bulges downward and the internal volume of the sub liquid chamber 18 increases. In addition, the valve body 28 does not deform | transform in the above process, but is located in the said open position.

When the above-described engine idles, the vibration is transmitted to the inner cylinder 3 of the vibration isolator 1 through the engine side bracket, and the vibration isolator 1 has a small amplitude and a high frequency range (for example, 13 Hz to 40 Hz). Idle vibration is input.
In this case, the liquid in the liquid chamber 15 does not flow through the restriction passage 22, but the membrane 20 is vibrated up and down in response to the input vibration in the membrane housing member 21, so that the above-described through holes 26, 27 are obtained. It passes through between the main liquid chamber 17 and the auxiliary liquid chamber 18 through. Thereby, although the internal volume of the main fluid chamber 17 varies, the fluid pressure variation of the main fluid chamber 17, that is, the variation of the dynamic spring constant of the vibration isolator 1 is suppressed, and the vibration transmitted to the vehicle body side is reduced. The At this time, the valve body 28 is stopped at the open position or slightly vibrates to the extent that the characteristics of the restriction passage 22 are not affected.

Further, when the above-described engine is operated, the vibration is transmitted to the inner cylinder 3 of the vibration isolator 1 through the engine side bracket, and the vibration isolator 1 has a relatively low frequency, that is, the above-described high frequency range. A shake vibration having a larger amplitude and a smaller frequency (for example, 8 Hz to 15 Hz) is input.
In this case, as the inner cylinder 3 is repeatedly moved upward and downward alternately by shake vibration, the liquid pressure in the liquid chamber 15 fluctuates, and an internal pressure difference is generated between the main liquid chamber 17 and the sub liquid chamber 18. . At this time, the membrane 20 is in close contact with the bottom plate portion 19 a of the partition member body 19 or the bottom plate portion 21 c of the membrane housing member 21, and the through-hole 26 of the bottom plate portion 19 a of the partition member body 19 or the bottom plate portion of the membrane housing member 21. The through hole 27 of 21c is closed. As a result, the liquid in the liquid chamber 15 passes between the main liquid chamber 17 and the sub liquid chamber 18 through only the restriction passage 22.
At this time, the restriction passage 22 is formed on the outer peripheral surface of the partition member main body 19 and extends along the circumferential direction, and the mounted portion 30 is inserted into the main liquid chamber side opening 24 in the partition member main body 19. Since it is located in the part which continues from the sub liquid chamber 18 side along the flow path direction, the flow of the liquid is not easily disturbed, and the liquid can easily pass through the main liquid chamber side opening 24 smoothly. Therefore, it is possible to suppress the attenuation performance from being lowered due to the provision of the valve body 28.

  Further, since the restriction passage 22 is tuned so that the flow path length and the cross-sectional area of the restriction passage 22 correspond to the shake vibration, a resonance phenomenon (liquid column resonance) occurs in the liquid flowing through the restriction passage 22 and the shake vibration occurs. Is attenuated, and vibration transmitted to the vehicle body is reduced. At this time, the valve body 28 is stopped at the open position or slightly vibrates to the extent that the characteristics of the restriction passage 22 are not affected. Thus, since the liquid flow between the main liquid chamber 17 and the restriction passage 22 is not hindered, it is possible to generate liquid column resonance in the restriction passage 22 at a predetermined frequency.

Further, when the engine and the vehicle body are largely displaced due to road surface unevenness or the like, a large vibration having a larger amplitude than the shake vibration may be input to the vibration isolator 1. For example, when the inner cylinder 3 moves greatly downward relative to the outer cylinder 2, a positive load is input to the vibration isolator 1, the internal volume of the main liquid chamber 17 is reduced, and the liquid in the main liquid chamber 17 is reduced. The pressure rises rapidly.
In this case, the hydraulic pressure of the main liquid chamber 17 acts on the surface of the valve body 28 facing inward in the radial direction, and the movable portion 31 of the valve body 28 moves in the radial direction as indicated by a two-dot chain line in FIG. It is elastically bent and deformed toward the outside, and passes through the main liquid chamber side opening 24 from the inside to the outside in the radial direction. Then, the gap between the movable portion 31 and the rubber film 11 that is the peripheral wall portion in the radial direction that defines the restriction passage 22 is narrowed, and the restriction passage 22 is narrowed. As a result, the flow path resistance of the restriction passage 22 increases, so that the restriction passage 22 becomes clogged, and it becomes difficult for liquid to flow into the restriction passage 22 from the main liquid chamber 17. Becomes larger. At this time, the constricted restricting passage 22 is gradually widened as the gap between the tip of the movable portion 31 and the rubber film 11 is narrowed most toward the sub liquid chamber 18 side in the flow path direction.
Thus, since the valve body 28 is narrowed without closing the restriction passage 22, the valve body 28 does not collide with the rubber film 11 located on the inner peripheral surface side of the outer cylinder 2, and this collision is prevented. It is possible to prevent the occurrence of abnormal noise and the occurrence of rattling on the mounted portion 30 of the valve body 28.

Thereafter, when the inner cylinder 3 moves largely upward relative to the outer cylinder 2, the load weight is input to the vibration isolator 1, the internal volume of the main liquid chamber 17 is expanded, and the liquid pressure of the main liquid chamber 17 is increased. Decreases rapidly.
At this time, as described above, the positive pressure in the main liquid chamber 17 is increased due to the restriction passage 22 being constricted by the valve body 28 when a positive load is applied, so that the liquid pressure in the main liquid chamber 17 is increased. Even if it drops rapidly, it becomes possible to suppress that the negative pressure of the main liquid chamber 17 becomes large, and it can suppress that cavitation arises. In addition, when the liquid pressure in the main liquid chamber 17 decreases, the movable part 31 of the valve body 28 is subjected to the negative pressure of the main liquid chamber 17 together with the elastic restoring force. And is deformed by bending toward the inner side in the radial direction from the main liquid chamber side opening 24 rather than the original open position. To do. As a result, the liquid easily flows from the auxiliary liquid chamber 18 through the restriction passage 22 into the main liquid chamber 17, and the decrease in the liquid pressure in the main liquid chamber 17 is further suppressed.

  According to the vibration isolator 1 described above, the two rivets 36 are provided so as to be shifted from each other in the length direction, so that one of the rivets 36 located on one side in the length direction is located. 36, while suppressing rattling on one side of the valve body 28 in the width direction, the rivet 36 located on the other side in the length direction of these rivets 36 is used for the other side of the valve body 28 in the width direction. The rattling can be suppressed. In addition, a region fixed by the rivet 36 in the valve body 28 can be secured widely in the length direction. As described above, rattling in the width direction with respect to the mounted portion 30 of the valve body 28 can be suppressed, and the posture of the valve body 28 at the time of bending deformation can be stabilized.

  In addition, since the mounting surface 32 and the mounting surface 33 that contact each other in the valve body 28 and the mounting portion 30 are formed as flat surfaces, for example, the mounting surface 32 and the mounting surface 33 are formed in a curved surface or the like. As compared with the case, the assembly accuracy of the valve body 28 and the mounted portion 30 can be stabilized easily and reliably, and the posture of the valve body 28 at the time of bending deformation can be further stabilized.

  Further, the first fixed surface 34 of the valve body 28 and the second fixed surface 35 of the mounted portion 30 are flat surfaces parallel to each other, and the valve body 28 and the mounted portion 30 are placed in the plate thickness direction by rivets 36. Therefore, the rivet 36 can firmly fix the valve body 28 and the mounted portion 30, and the rattling of the valve body 28 with respect to the mounted portion 30 can be further suppressed.

Further, as described above, since the posture of the valve body 28 at the time of bending deformation is stabilized, it is possible to reliably prevent the valve body 28 from inadvertently colliding with another member and to restrict the passage 22 by the valve body 28. It is possible to stabilize the degree of stenosis with respect to the pressure, and the hydraulic pressure at which the valve body 28 stencils the restriction passage 22 can be made highly accurate. Thereby, for example, it is possible to easily prevent the valve body 28 from constricting the restriction passage 22 at the time of shake vibration, and it is possible to prevent the attenuation performance from being lowered.
In addition, since all the rivets 36 are arranged in a line along the length direction, the exclusive space along the width direction of the rivets 36 can be kept small, and the recent vibration isolator 1 can be made compact. For example, even if the flow path width of the restriction passage 22 is narrowed according to the demand, each end portion of the plurality of rivets 36 can be easily positioned in the restriction passage 22.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, two rivets 36 are provided and these rivets 36 are arranged in a line along the length direction. However, at least two of the plurality of rivets 36 are arranged in the length direction. There is no limitation as long as they are shifted from each other, and a rivet 36 may be provided as shown in FIGS.

In the configuration shown in FIG. 3, of the plurality of rivets 36, at least two rivets 36 are arranged so as to be shifted from each other in the width direction, and the remaining rivets 36 are arranged in the length direction more than the at least two rivets 36. It arrange | positions to the said one side (fixed part 29 side). In the illustrated example, three rivets 36 are provided, and two of the rivets 36a are arranged so as to be shifted from each other in the width direction and are arranged along the width direction. Further, the remaining one rivet 36b is disposed on the one side in the length direction with respect to the two rivets 36a, and is disposed at an equal interval with respect to any of the two rivets 36a.
In this case, for example, when the movable portion 31 of the valve body 28 is bent and deformed inward in the radial direction, the force is prevented from being concentratedly applied to the specific rivet 36, and this force is applied to the two rivets 36a. It becomes possible to add in a distributed manner, and rattling of the valve body 28 with respect to the mounted portion 30 can be reliably suppressed.
Further, since the three rivets 36 are provided, the valve body 28 and the mounted portion 30 can be fixed more firmly than when two rivets 36 are provided.

In the configuration shown in FIG. 4, three rivets 36 are provided. In the illustrated example, two of the rivets 36c are arranged so as to be shifted from each other in the width direction, and are arranged along the width direction. The remaining one rivet 36d is disposed on the other side (movable part 31 side) in the length direction with respect to the two rivets 36a, and the distance between both of the two rivets 36c is equal. Has been placed.
In this case, since the three rivets 36 are provided as in the configuration shown in FIG. 3, the valve body 28 and the mounted portion 30 are more firmly fixed than in the case where two rivets 36 are provided. Can do.
In any of the configurations described above, two rivets 36 of the plurality of rivets 36 are provided so as to be shifted from each other in the length direction. However, three or more rivets 36 are shifted. May be.

  Further, in the above embodiment, the rivets 36 are provided at intervals in the length direction. However, if the rivets 36 are provided to be shifted from each other in the length direction, that is, the rivets 36 However, the present invention is not limited to this as long as 36 is provided with a distance between the centers in the length direction.

  In the above embodiment, the main liquid chamber side opening 24 is formed on the inner peripheral surface of the partition member main body 19 constituting a part of the partition wall of the main liquid chamber 17, and the valve body 28 is provided in the main liquid chamber 17. However, instead of this, the inner peripheral surface of the partition member main body 19 constitutes a part of the partition wall of the sub liquid chamber 18, and the sub liquid chamber side opening 25 is formed on the inner peripheral surface. In addition, the configuration in which the valve body 28 is provided in the auxiliary liquid chamber 18 may be adopted, or the inner peripheral surface of the partition member main body 19 is divided into two along the direction of the axis O, and these are partitioned. Each part constitutes a part of the partition wall of each of the main liquid chamber 17 and the sub liquid chamber 18, and the main liquid chamber side opening 24 and the sub liquid chamber side opening 25 are formed separately to form the main liquid chamber 17. In addition, the valve body 28 may be provided in both the auxiliary liquid chamber 18.

  In the above-described embodiment, the valve body 28 is fixed to the surface facing the inner side in the radial direction (the mounting surface 33) in the mounted portion 30. It may be fixed to the surface (second fixed surface 35) that faces. In this configuration, the movable portion 31 of the valve body 28 may be positioned in the peripheral end portion on the main liquid chamber 17 side in the flow passage direction in the restriction passage 22 or bend toward the inner side in the radial direction. While extending along the circumferential direction of the partition member main body 19, the partition member main body 19 may be protruded from the main liquid chamber side opening 24 into the main liquid chamber 17.

Moreover, in the said embodiment, although the to-be-attached part 30 was located in the part connected from the secondary liquid chamber 18 side along the said flow path direction in the partition part main body 19 to the main liquid chamber side opening part 24, The position of the mounted portion 30 is not limited to this.
Moreover, in the said embodiment, although the rivet 36 was used as a fixing member for fixing the valve body 28 to the to-be-mounted part 30 of the partition member 16, a volt | bolt and a lock nut may be used, for example.
Moreover, in the said embodiment, although the mounting surface 32, the to-be-mounted surface 33, the 1st fixing surface 34, and the 2nd fixing surface 35 were all flat surfaces, they may not be a flat surface.

Moreover, in the said embodiment, although the movable part 31 of the valve body 28 showed the structure which constricts the restriction | limiting channel | path 22 when a positive load is input, not only this but the movable part 31 of the valve body 28 is shown, for example. The restriction passage 22 may be closed by contacting the rubber film 11 and the inner peripheral surface of the partition member main body 19.
Moreover, in the said embodiment, although the valve body 28 is functioning as a positive pressure valve which can constrict the restriction | limiting channel | path 22 when a positive load is input into the vibration isolator 1, it is not restricted to this. For example, the valve element 28 may function as a negative pressure valve that narrows the restriction passage 22 in a state where no large vibration is inputted and expands the restriction passage 22 when a load weight is inputted to the vibration isolator 1.
Moreover, although the compression type was shown as the vibration isolator 1 in the said embodiment, it is a suspension type attached and used so that the main liquid chamber 17 may be located in the lower side and the sub liquid chamber 18 may be located in the upper side. The present invention is also applicable to the vibration isolator 1.

  Moreover, the vibration isolator 1 according to the present invention is not limited to the case of manufacturing an engine mount for a vehicle, and can be applied to the vibration isolator 1 in addition to the engine mount. For example, the present invention may be applied to a mount of a generator mounted on a construction machine, or may be applied to a mount of a machine installed in a factory or the like.

Moreover, in the said embodiment, although the restriction | limiting channel | path 22 is formed in the partition member 16, it is not restricted to this, The restriction | limiting channel | path 22 other than the partition member 16 may be formed. For example, the restriction passage 22 may be formed by machining a part of the outer cylinder 2. Even when the restriction passage 22 is formed in the partition member 16, the restriction passage 22 may be formed in a place different from the outer peripheral surface of the partition member main body 19.
Moreover, in the said embodiment, although the partition member 16 shall be provided with the cylindrical partition member main body 19, it is not restricted to this. For example, the partition member main body 19 may be plate-shaped or columnar.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

It is a longitudinal section of the vibration isolator of one embodiment concerning the present invention. It is a cross-sectional view of the partition member provided in the vibration isolator shown in FIG. It is a figure which shows another example of the vibration isolator which concerns on this invention, Comprising: It is the elements on larger scale which looked at the valve body vicinity from the inner side of the radial direction of a partition member main body. It is a figure which shows another example of the vibration isolator which concerns on this invention, Comprising: It is the elements on larger scale which looked at the valve body vicinity from the inner side of the radial direction of a partition member main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-vibration apparatus 2 Outer cylinder 3 Inner cylinder 4 Elastic body 16 Partition member 17 Main liquid chamber 18 Sub liquid chamber 19 Partition member main body 22 Restriction channel 24 Main liquid chamber side opening (opening of one end side of a limitation channel)
25 Secondary liquid chamber side opening (opening)
28 Valve body 30 Mounted part 32 Mounting surface (surface of valve body)
33 Mounted surface (surface of mounted part)
34 1st fixed surface (back surface of valve body)
35 Second fixed surface (rear surface of the mounted part)
36, 36a, 36b, 36c, 36d Rivet (fixing member)
40 Rubber body

Claims (5)

An outer cylinder connected to one of the vibration generator and the vibration receiver, and an inner cylinder connected to the other,
An elastic body that elastically connects these two cylinders;
A partition member that divides the liquid chamber in the outer cylinder into a main liquid chamber on one side and a sub liquid chamber on the other side, the elastic body being a part of the wall surface, and
A liquid-filled vibration isolator in which a restriction passage communicating these two liquid chambers is formed,
Inside the outer cylinder, one end in the length direction is a fixed end, and the other end is provided with a valve body that is elastically bent and deformed by receiving the liquid pressure of the main liquid chamber or the sub liquid chamber. ,
One end of the valve body in the length direction is formed by a plurality of fixing members sandwiching the valve body and the mounted portion from both sides in the plate thickness direction of the valve body in a mounted portion formed inside the outer cylinder. Fixed,
At least two of the plurality of fixing members are provided to be shifted from each other in the length direction. The vibration isolator according to claim 1,
In each of the valve body and the mounted portion, the surfaces that contact each other are formed as flat surfaces, and the back surface opposite to the surface is formed as a flat surface parallel to the surface. Anti-vibration device. In the vibration isolator according to claim 1 or 2,
The anti-vibration device according to claim 1, wherein the valve body is bent and deformed so that the restriction passage can be narrowed when a load is input in a direction in which the hydraulic pressure in the main liquid chamber increases. The vibration isolator according to claim 3,
The partition member includes a cylindrical partition member main body,
The restriction passage is formed on the outer peripheral surface of the partition member body and extends along the circumferential direction thereof.
An opening on at least one end of both ends of the restriction passage that opens separately to the main liquid chamber and the sub liquid chamber is formed on an inner peripheral surface of the partition member body and the main liquid chamber side Open to
The attached portion is located in a portion of the partition member body that is connected to the opening on one end side of the restriction passage from the side of the secondary liquid chamber along the flow passage direction of the restriction passage. apparatus. A manufacturing method for manufacturing the vibration isolator according to claim 4,
As the fixing member, a rivet is used,
A main rubber member forming step for forming a main rubber member in which the outer cylinder and the inner cylinder are connected by the elastic body;
A valve body fixing step of fixing the valve body to the partition member body;
An assembly step of assembling at least the partition member to the main body rubber member, sealing the inside of the outer cylinder and partitioning into the main liquid chamber and the sub liquid chamber to form a vibration isolator,
In the valve body fixing step, a plurality of the rivets are simultaneously driven into the valve body and the mounted portion from the outside in the radial direction of the partition member body to fix the valve body to the partition member body. A method for manufacturing a vibration isolator.

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