JP4951589B2 - Vibration isolator - Google Patents

Description

  The present invention relates to a vibration isolator that is used when mounting a vibration generating unit such as an automobile engine on a vibration receiving unit such as a vehicle body.

As this type of vibration isolator, conventionally, as shown in, for example, Patent Document 1 below, a resin-made annular outer ring connected to either one of a vibration generating unit and a vibration receiving unit (first An attachment member), a pressing body (second attachment member) connected to any one of the vibration generating portion and the vibration receiving portion, and the outer ring and the pressing body are elastically connected to each other and on the upper side of the outer ring. An elastic support that closes the open end, a bellows (diaphragm) that closes the lower open end of the outer ring, and a liquid chamber formed between the elastic support and the bellows is a working chamber (main liquid chamber). There is known a configuration including a partition wall (partition member) partitioned into a compensation chamber (sub-liquid chamber) and a resin bearing cover (press member) that presses the outer ring from below. At the cover edge portion of the bearing cover described above, an annular flange-like member standing upward is provided, and an outer peripheral edge portion of the outer ring is disposed inside the flange-like member, and the flange-like member. The bearing cover is joined to the outer ring by catching the tip of the outer ring on the outer peripheral edge of the outer ring.
JP 2006-57847 A

  However, in the above-described conventional vibration isolator, since the tip of the hook-shaped member is only hooked on the outer peripheral edge of the outer ring, the sealing performance at the joint between the outer ring and the bearing cover is low. Therefore, there is a demand for improvement in sealing performance at the joint portion between the outer ring and the bearing cover. Moreover, since the hook-shaped member is erected on the cover edge of the bearing cover, the strength of the hook-shaped member tends to be weak. Therefore, it is desired to increase the strength of the joint portion between the outer ring and the bearing cover. Furthermore, since the tip of the hook-like member is only hooked on the outer peripheral edge of the outer ring, the bonding force between the outer ring and the bearing cover is small. Accordingly, there is a demand for strengthening the joining force at the joint between the outer ring and the bearing cover.

  The present invention takes the above-described conventional problems into consideration, improves the sealing performance of the joint portion between the first mounting member and the pressing member, increases the strength of the joint portion between the first mounting member and the pressing member, And it aims at providing the vibration isolator which can aim at reinforcement | strengthening of the joining force of a 1st attachment member and a pressing member.

  A vibration isolator according to the present invention includes a resin-made annular first mounting member coupled to any one of a vibration generating portion and a vibration receiving portion, and any of the vibration generating portion and the vibration receiving portion. A rubber elastic body that elastically connects the second mounting member connected to the other, the first mounting member and the second mounting member, and closes the opening end on one side in the axial direction of the first mounting member. A diaphragm that closes the opening end on the other side in the axial direction of the first mounting member; a liquid chamber that is formed between the rubber elastic body and the diaphragm; A partition member that is formed of a rubber elastic body and whose inner volume changes due to deformation of the rubber elastic body; and a sub liquid chamber in which a part of the partition wall is formed of the diaphragm. In the vibration isolator, the other of the first mounting member And a resin-made annular pressing member that holds the first mounting member from the other side is provided, and a joint portion between the first mounting member and the pressing member is provided with the first mounting member. A seal region in which an elastic body capable of elastic deformation is interposed over the entire circumference between the joint surface and the joint surface of the pressing member, and an interface between the joint surface of the first mounting member and the joint surface of the pressing member A welding region in which portions are melted and the joining surfaces are welded to each other is formed side by side in the radial direction of the first mounting member.

  Due to such features, when the resin pressing member is assembled to the resin first mounting member, the first mounting in the welding region is performed with the bonding surface of the first mounting member and the bonding surface of the pressing member being overlapped. By melting the interface portion between the member and the pressing member, the bonding surface of the first mounting member and the bonding surface of the pressing member in the welding region are welded, and the first mounting member and the pressing member are integrated. At this time, between the joint surface of the first mounting member and the joint surface of the pressing member in the seal region, an elastic body that is in close contact with the joint surface of the first mounting member and the joint surface of the pressing member is interposed.

  In the vibration isolator according to the present invention, it is preferable that the seal area is disposed on the inner side in the radial direction than the welding area.

  As a result, when the interface portion between the first mounting member and the pressing member is melted, the welding operation can be easily performed from the outer peripheral side of the first mounting member and the pressing member, and the influence of the welding operation on the elastic body is reduced. .

  Further, in the vibration isolator according to the present invention, the radial step is formed over the entire circumference so as to mesh with the joint surface of the first mounting member and the joint surface of the pressing member. It is preferable that either one of the sealing area and the welding area is disposed on the one side with respect to the other.

  Thereby, when the interface part of the 1st attachment member and pressing member in a welding area | region is fuse | melted, it becomes difficult for the molten resin to flow into a seal | sticker area | region.

  In the vibration isolator according to the present invention, a resin convex portion protrudes from at least one of the joining surface of the first mounting member in the welding region and the joining surface of the pressing member in the welding region, and the resin It is preferable that the convex portion is melted and the joining surface of the first mounting member in the welding region and the joining surface of the pressing member in the welding region are welded.

  Accordingly, when the interface portion between the first mounting member and the pressing member is melted, the resin convex portion is melted, and the bonding surface of the first mounting member and the bonding surface of the pressing member are easily welded in the welding region.

  In the vibration isolator according to the present invention, an elastic convex portion is formed on the elastic body, and the elastic convex portion is a joint surface of the first mounting member in the seal region or the pressing member in the seal region. It is preferable that the material is elastically crushed by being pressed against the joint surface.

  Thereby, when the joining surface of a 1st attachment member and the joining surface of a pressing member are piled up, an elastic convex part contacts closely to the joining surface of a 1st attachment member, or the joining surface of a pressing member.

  Further, in the vibration isolator according to the present invention, a pair of concave grooves extending in the circumferential direction of the first mounting member and facing each other are respectively provided on end surfaces of the first mounting member and the pressing member facing each other. It is preferable that an orifice passage that connects the main liquid chamber and the sub liquid chamber is formed by the pair of concave grooves.

  As a result, the orifice passage is formed by assembling the pressing member to the first mounting member, so there is no need to separately assemble the member in which the orifice passage is formed.

In the vibration isolator according to the present invention, an annular diaphragm ring is provided as the pressing member, and the diaphragm is stretched inside the diaphragm ring so as to close the inside of the diaphragm ring. Is preferred.

  Accordingly, the first mounting member is pressed from the other side by the diaphragm ring (holding member) that holds the diaphragm. That is, since the diaphragm is assembled to the first mounting member by assembling the pressing member (diaphragm ring) to the first mounting member, it is not necessary to separately assemble the diaphragm.

  According to the vibration isolator of the present invention, the elastic body is interposed between the joint surface of the first mounting member and the joint surface of the pressing member in the seal region, so that the gap between the first mounting member and the pressing member is It is possible to securely seal the joint portion. In addition, since the bonding surface of the first mounting member and the bonding surface of the pressing member are welded in the welding region, the strength of the bonding portion between the first mounting member and the pressing member can be improved, and the first mounting The member and the pressing member can be reliably bonded.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vibration isolator according to the present invention will be described with reference to the drawings.

  1 is a plan view of the vibration isolator 1 according to the present embodiment as viewed from above (one side in the present invention), FIG. 2 is a cross-sectional view taken along the line A-A shown in FIG. 1, and FIG. 4 is a plan view of the vibration isolator 1 according to the present embodiment as viewed from below (the other side in the present invention), and FIG. It is equivalent to the 1st attachment member in invention.) It is a fragmentary sectional view of the junction part 11 of the diaphragm ring 9 (equivalent to the pressing member in this invention). 5A shows a state before welding, and FIG. 5B shows a state after welding.

  In the present embodiment, the lower side in FIG. 2 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 corresponds to the other side in the present invention. Further, the upper side in FIG. 2 is the rebound side, that is, the side opposite to the input direction of the static load, and corresponds to one side in the present invention. In the following description, the bound side (the other side) is the lower side, and the rebound side (the one side) is the upper side. In the present embodiment, the axial direction (vertical direction in FIG. 1) of the inner cylinder 4 to be described later is the front-rear direction, and the horizontal direction (lateral direction in FIG. 1) perpendicular to the axial direction of the inner cylinder 4 is the horizontal direction. To do. Further, a symbol L shown in FIG. 2 indicates a central axis of the accommodation hole 20 described later, and is simply referred to as an axis L hereinafter.

  The vibration isolator 1 is used when an engine, which is an example of a vibration generating unit, is mounted on a vehicle body, which is an example of a vibration receiving unit, and is a device for attenuating the vibration of the vibration generating unit. As shown in FIGS. 1 to 4, the vibration isolator 1 is illustrated via an annular outer cylinder 3 connected to a vehicle body (not shown) via a resin bracket member 2 and an engine bracket (not shown). The inner cylinder 4 connected to the engine (corresponding to the second mounting member in the present invention), the outer cylinder 3 and the inner cylinder 4 are elastically connected, and the upper open end of the outer cylinder 3 is closed. A rubber elastic body 5, a diaphragm 6 for closing the lower open end of the outer cylinder 3, and a liquid chamber 7 formed between the rubber elastic body 5 and the diaphragm 6 include a main liquid chamber 7A and a sub liquid chamber 7B. It is the basic composition provided with the partition member 8 divided into. The outer cylinder 3 is fitted in the accommodation hole 20 formed in the bracket member 2 described above.

  The bracket member 2 is a resin member made of, for example, polyamide (PA), polyphenyl sulfide (PPS) or the like, and has a substantially cylindrical holder extending in the vertical direction (bound-rebound direction). The amount of downward displacement relative to the bracket member 2 (outer cylinder 3) of the inner cylinder 4 and the leg part 22 projecting radially outward from the outer peripheral surface of the lower end of the holder 21 and the holder part 21 has reached a predetermined amount. Sometimes, a bounce stopper portion 23 that restricts the relative downward movement of the inner cylinder 4 relative to the bracket member 2 (outer cylinder 3), and the relative upward displacement amount of the inner cylinder 4 relative to the bracket member 2 (outer cylinder 3). And a rebound stopper portion 24 for restricting the upward movement of the inner cylinder 4 relative to the bracket member 2 (outer cylinder 3) when the predetermined amount is reached.

  The holder portion 21 is a cylindrical portion for holding the outer cylinder 3, and is formed with an accommodation hole 20 penetrating in the vertical direction. A step is formed on the inner peripheral surface of the accommodation hole 20. More specifically, the receiving hole 20 has a circular large-diameter hole 20a that is open downward and a circular shape in plan view, and a circular shape in plan view that is disposed above the large-diameter hole 20a and has a smaller diameter than the large-diameter hole 20a. The small-diameter hole 20b includes the large-diameter hole 20a and the small-diameter hole 20b that are formed on the same axis (axis L).

  The leg portions 22 are flat plate portions parallel to the vertical plane of the axis L, and are respectively disposed on the left and right sides of the holder portion 21. A cylindrical fitting 22a into which a bolt or the like for fastening to a vehicle body (not shown) is inserted is embedded in the central portion of one leg 22A. The one leg portion 22A is provided with a substantially triangular rib 22b formed between the upper surface of the leg portion 22A and the outer peripheral surface of the holder portion 21. A pair of cylindrical fittings 22a arranged in the front-rear direction is embedded in the other leg 22B. The other leg portion 22B is provided with a substantially triangular rib 22c formed between the upper surface of the leg portion 22B and the outer peripheral surface of the holder portion 21.

  The bound stopper portion 23 is a convex portion projecting from the upper end surface of the holder portion 21, and is disposed on one side of the holder portion 21 in the front-rear direction (hereinafter referred to as the front). The bound stopper portion 23 is formed in an arc shape along the circumferential direction of the accommodation hole 20 in plan view. Further, the upper end surface of the bound stopper portion 23 is formed flat along the vertical plane of the axis L.

  The rebound stopper portion 24 is a gate-shaped portion erected on the upper end of the holder portion 21, and includes a contact portion 24 a disposed at a distance above the accommodation hole 20 and both end portions of the contact portion 24 a. And a pair of support portions 24b and 24c that respectively support the two. The contact portion 24a is a plate portion that is parallel to the vertical plane of the axis L and extends in the left-right direction. The support portions 24b and 24c are side wall portions that stand on the upper end surface of the holder portion 21 and whose upper ends are connected to the end portions of the contact portions 24a. Further, a plurality of ridges 24d extending in the circumferential direction are arranged in parallel on the outer peripheral surface of the rebound stopper portion 24 (the upper surface of the contact portion 24a and the outer surfaces of the support portions 24b and 24c).

Further, the bracket member 2 is provided with a locking portion 25 that presses the outer cylinder 3 from the upper side, and a protruding portion 26 that is inserted into a through hole 97 formed in a diaphragm ring 9 described later.
If it demonstrates in detail, the latching | locking part 25 is a convex part which protruded in the radial inside from the inner peripheral surface of the upper end part of the small diameter hole 20b (accommodating hole 20), and is formed in the inner peripheral surface of the small diameter hole 20b (accommodating hole 20). It is formed over the entire circumference along the circumference, and is formed in an annular shape in plan view.

  The protrusion 26 is a pin-like protrusion that protrudes from the lower end surface of the holder portion 21, and protrudes downward from the lower end surface of the holder portion 21. A plurality of projections 26 are arranged around the accommodation hole 20. More specifically, two protrusions 26 are arranged on the one side in the left-right direction (one leg 22A side) of the lower end surface of the holder part 21 with a gap therebetween. In addition, on the other side in the left-right direction (on the other leg portion 22B side) of the lower end surface of the holder portion 21, three projecting portions 26 are evenly arranged with a space therebetween. Further, one protrusion 26 is disposed on the front side portion of the lower end surface of the holder portion 21.

  Further, at the tip of the protruding portion 26 protruding from the through hole 97 described later, the enlarged diameter portion expanded to a diameter larger than the inner diameter of the through hole 97 by melting the protruding portion 26 inserted into the through hole 97. 26a is formed. As a method for melting the protruding portion 26, any one of ultrasonic melting, thermal melting, and laser melting is performed. A diaphragm ring 9 to be described later is pressed from below by the above-described enlarged diameter portion 26a. The outer cylinder 3 and the diaphragm ring 9 are sandwiched between the protruding portion 26 and the locking portion 25 described above.

  The outer cylinder 3 is an annular member disposed coaxially with the accommodation hole 20 (axis L), and both ends of the outer cylinder 3 are opened. The outer cylinder 3 is a resin member made of, for example, polyamide (PA) or polyphenyl sulfide (PPS). The inner peripheral surface on the upper end side of the outer cylinder 3 is a tapered surface 30 that gradually increases in diameter as it goes upward. The upper portion of the outer cylinder 3 is fitted inside the small diameter hole 20 b of the accommodation hole 20 of the bracket member 2, and the upper end surface of the outer cylinder 3 is in contact with the lower end surface of the locking portion 25. Further, a flange portion 31 is formed at the lower end portion of the outer cylinder 3 so as to protrude radially outward from the outer peripheral surface of the outer cylinder 3. The flange portion 31 is formed over the entire circumference along the outer peripheral surface of the outer cylinder 3, and is formed in an annular shape in plan view. Further, a concave groove 32 extending in the circumferential direction is formed on the lower end surface of the outer cylinder 3. The concave groove 32 is formed in an arc shape (C shape) in a plan view, and is formed on the inner circumferential side wall 34 on the radially inner side at the end portion on one side in the length direction (circumferential direction) of the concave groove 32. An opening 33 is formed to communicate the inside of the groove 32 and the inside of the outer cylinder 3 (main liquid chamber 7A). Further, a covering rubber 35 formed integrally with the rubber elastic body 5 is formed on the inner peripheral surface of the lower portion of the outer cylinder 3, the lower end surface of the inner peripheral side wall 34, and the side surface in the concave groove 32 of the inner peripheral side wall 34. It is covered. The covering rubber 35 is vulcanized and bonded to the outer cylinder 3.

  The inner cylinder 4 is a substantially rectangular tube-shaped member that extends in a direction orthogonal to the axis L and is open at both ends. The inner cylinder 4 is formed integrally with the rubber elastic body 5 from a rubber material. More specifically, a bottom plate portion 40 parallel to the vertical plane of the axis L, a pair of side wall portions 41, 41 standing on the upper surface of the bottom plate portion 40 and facing each other with a space therebetween, and a pair of side wall portions 41, 41 The upper wall part 42 was constructed between the upper ends of these. A dish-shaped first reinforcing plate 43 bulging downward is embedded in the bottom plate portion 40. Further, a second reinforcing plate 44 having a U-shaped cross-sectional view extending in the axial direction (front-rear direction) of the inner cylinder 4 is embedded inside the pair of side wall portions 41, 41 and the upper wall portion 42.

  The inner cylinder 4 is provided with a bounce contact portion 45 that can come into contact with the bounce-side stopper portion 23. The bounce contact portion 45 is an elastically deformable rubber flat plate portion parallel to the vertical surface of the axis L projecting forward from the front portion of the bottom plate portion 40 and is formed integrally with the inner cylinder 4. Has been. The bounce contact portion 45 is disposed to face the upper end surface of the bounce-side stopper portion 23 with a space in the vertical direction.

  The inner cylinder 4 is provided with a plurality of rebound contact portions 46 that are in contact with the lower surface of the rebound side stopper portion 24. The rebound contact portion 46 is an elastically deformable rubber ridge that protrudes on the upper surface of the upper wall portion 42 and extends in the left-right direction, and is integrally formed with the inner cylinder 4. The plurality of rebound contact portions 46 are juxtaposed at intervals in the axial direction (front-rear direction) of the inner cylinder 4.

  The rubber elastic body 5 is a substantially dome-shaped rubber elastic body that closes the opening end on the upper end side of the outer cylinder 3, and is interposed between the tapered surface 30 of the outer cylinder 3 and the bottom plate portion 40 of the inner cylinder 4. Yes. That is, the outer peripheral surface of the rubber elastic body 5 is vulcanized and bonded to the tapered surface 30 of the outer cylinder 3, and the upper portion of the rubber elastic body 5 is formed integrally with the bottom plate portion 40 of the inner cylinder 4.

  The diaphragm 6 is a thin film member that can be deformed according to a change in the hydraulic pressure (internal pressure) in the sub liquid chamber 7B, and is formed of, for example, a rubber material that can be elastically deformed. The diaphragm 6 is provided inside an annular diaphragm ring 9, and the inside of the diaphragm ring 9 is closed by the diaphragm 6.

  The diaphragm ring 9 described above functions as a member that holds the diaphragm 6 and also functions as a pressing member that is superimposed on the lower side of the outer cylinder 3 and presses the outer cylinder 3 from the lower side. More specifically, the diaphragm ring 9 is a substantially annular member whose outer diameter and inner diameter are substantially the same as those of the outer cylinder 3, and is a resin member made of, for example, polyamide (PA) or polyphenyl sulfide (PPS). . The diaphragm ring 9 is disposed inside the large-diameter hole 20a of the accommodation hole 20 of the bracket member 2, is stacked below the outer cylinder 3, and is disposed coaxially with the outer cylinder 3 (axis L). Yes.

  A concave groove 91 extending in the circumferential direction is formed on the upper end surface of the diaphragm ring 9. The concave groove 91 is formed in an arc shape (C shape) in plan view, and is opposed to the concave groove 32 of the outer cylinder 3 in the vertical direction. Of the inner peripheral side wall 92 on the radially inner side forming the concave groove 91, the other end of the concave groove 91 (the end of the concave groove 91 facing the end opposite to the one end of the concave groove 32 described above). ), An opening (not shown) that connects the inside of the groove 91 and the inside of the diaphragm ring 9 (sub liquid chamber 7B) is formed.

  The inner peripheral surface of the diaphragm ring 9, the upper end surface of the inner peripheral side wall 92, and the inner peripheral surface of the concave groove 91 are covered with a covering rubber 94 formed integrally with the diaphragm 6. The covering rubber 94 is vulcanized and bonded to the diaphragm ring 9.

  An orifice passage 10 that connects the main liquid chamber 7A and the sub liquid chamber 7B is formed by the concave groove 91 of the diaphragm ring 9 and the concave groove 32 of the outer cylinder 3. That is, the orifice passage 10 extends along the circumferential direction of the outer cylinder 3 and the diaphragm ring 9, and communicates with the main liquid chamber 7 </ b> A through the opening 33 of the outer cylinder 3. The sub-liquid chamber 7 </ b> B communicates with the inner peripheral wall 92 through an opening (not shown). The orifice passage 10 is a liquid path for attenuating the vibration by causing liquid column resonance (resonance phenomenon) in the liquid flowing through the orifice passage 10 when vibration is input to the vibration isolator 1. Yes, it is tuned to correspond to the frequency and amplitude of shake vibration, which is resonance vibration in a large amplitude and low frequency range (for example, 8 Hz to 15 Hz) in the vehicle.

  Further, an upper flange portion 90 is formed at the upper end portion of the diaphragm ring 9 so as to face the flange portion 31 of the outer cylinder 3. The upper flange portion 90 protrudes radially outward from the upper end of the radially outer peripheral side wall 93 that forms the concave groove 91. The upper flange portion 90 is formed over the entire circumference along the outer peripheral surface of the diaphragm ring 9 and has an annular shape in plan view.

  Further, as shown in FIG. 5, the joint portion 11 between the diaphragm ring 9 and the outer cylinder 3 includes the joint surface (seal joint surface 9a) of the diaphragm ring 9 and the joint surface (seal joint surface 3a) of the outer cylinder 3. Seal rubber 11 (corresponding to the elastic body in the present invention) that can be elastically deformed between the seal ring 11A and the joint surface (welded joint surface 9b) of the diaphragm ring 9 and the outside. A welded region 11B in which an interface portion with the joint surface (welded joint surface 3b) of the cylinder 3 is melted and the joint surfaces 9b and 3b are welded to each other is formed side by side in the radial direction of the outer cylinder 3. .

  More specifically, the seal region 11A is formed on the radially inner side with respect to the welding region 11B. That is, of the upper end surface of the diaphragm ring 9, the radially inner portion (seal joint surface 9a) is covered with the annular seal rubber 12, and the radially outer portion (welded joint surface 9b) extends over the entire circumference. The outer cylinder 3 is welded to the lower end surface (welded joint surface 3b). Further, of the lower end surface of the outer cylinder 3, the radially inner portion (seal bonding surface 3a) is in intimate contact with the seal rubber 12, and the radially outer portion (welding bonding surface 3b) is a diaphragm ring over the entire circumference. 9 is welded to the upper end surface (welded joint surface 9b). The above-described seal rubber 12 is a belt-like (film-like) rubber elastic body extending along the inner periphery of the diaphragm ring 9, and is vulcanized and bonded to the seal joint surface 9 a of the diaphragm ring 9. The seal rubber 12 is formed integrally with a covering rubber 94 formed on the inner peripheral surface of the concave groove 91 of the diaphragm ring 9.

  Further, the upper end surface of the diaphragm ring 9 and the lower end surface of the outer cylinder 3 are formed with stepped portions that form steps in the radial direction of the outer cylinder 3 so as to mesh with each other. Further, it is disposed at a position below the welding area 11B. That is, a step portion 9c is formed at the radial center portion of the upper end surface of the diaphragm ring 9, and the seal joint surface 9a formed on the radially inner side of the step portion 9c is radially outside the step portion 9c. It is arrange | positioned rather than the welding joining surface 9b formed in this. Further, a stepped portion 3c is formed in the radially central portion of the lower end surface of the outer cylinder 3, and the seal joint surface 3a formed on the radially inner side of the stepped portion 3c is radially outward of the stepped portion 3c. It is arrange | positioned rather than the welding joining surface 3b formed in this.

  Further, the sealing rubber 12 is provided with an elastic convex portion 12a that can be elastically deformed. As shown in FIG. 5B, the elastic convex portion 12 a is pressed against the seal joint surface 3 a of the outer cylinder 3 and is elastically crushed and deformed. Further, the elastic convex portion 12 a is disposed at the center portion in the width direction (radial direction) of the seal rubber 12. The elastic convex portion 12a may have an annular ridge portion extending over the entire circumference, or a plurality of arc-shaped ridge portions or pin-like convex portions arranged in the circumferential direction. It may be provided.

  Further, as shown in FIG. 5A, a meltable resin convex portion 3d protrudes from the welding joint surface 3b when the outer cylinder 3 is molded. By melting the resin convex portion 3d, as shown in FIG. 5B, the weld joint surface 3b of the outer cylinder 3 and the weld joint surface 9b of the diaphragm ring 9 are welded. As shown in FIG. 5A, the height dimension H1 at the time of molding the weld convex part 3d is substantially the same as the height dimension H2 at the time of molding the elastic convex part 12a. The resin protrusion 3d may have an annular protrusion extending over the entire circumference, or a plurality of arc-shaped protrusions or pin-like protrusions arranged in the circumferential direction. It may be provided.

  As shown in FIGS. 1 to 4, lower flange portions 96 </ b> A, 96 </ b> B, and 96 </ b> C projecting radially outward from the outer peripheral surface of the diaphragm ring 9 are formed at the lower end portion of the diaphragm ring 9. The lower flange portions 96A, 96B, and 96C extend along the outer peripheral surface of the diaphragm ring 9. The lower flange portions 96A, 96B, and 96C are respectively provided on the left and right side portions and the front portion of the diaphragm ring 9, and the upper surfaces of these lower flange portions 96A, 96B, and 96C are below the holder portion 21. Each is in contact with the end face. The lower flange portions 96A, 96B, and 96C are formed with through holes 97 that are circular in plan view. More specifically, through holes 97 are formed in both end portions of the lower flange portion 96A on the one leg portion 22A side. Further, the lower flange portion 96B on the other leg portion 22B side is formed with through holes 97 at both end portions and the central portion. Further, a through-hole 97 is formed in the central portion of the lower flange portion 96 </ b> C disposed in the front portion of the diaphragm ring 9.

  The liquid chamber 7 is a sealed space in which a liquid is enclosed, and is partitioned into a rebound-side main liquid chamber 7A and a bound-side sub-liquid chamber 7B by a partition member 8 disposed therein. The main liquid chamber 7 </ b> A is a chamber in which a part of the partition wall (upper wall) is formed of the rubber elastic body 4, and the internal volume of the main liquid chamber 7 </ b> A changes due to the deformation of the rubber elastic body 5. The secondary liquid chamber 7B is a chamber in which a part of the partition wall (lower wall) is formed of the diaphragm 6. The internal volume of the secondary liquid chamber 7B is changed by the change of the liquid pressure (internal pressure) in the secondary liquid chamber 7B. Changes as a result of deformation.

  The partition member 8 includes a main body member 80 fitted inside the outer cylinder 3 and a movable member 82 housed in a housing chamber 81 formed in the main body member.

  The main body member 80 includes a lower plate portion 83 in a plan view that is parallel to the vertical plane of the axis L, a C-shaped inner wall portion 84 that is erected at the center portion of the lower plate portion 83, and an upper end of the inner wall portion 84. A C-shaped upper plate portion 85 projecting radially outward from the portion, and an end wall portion 86 formed between both circumferential ends of the upper plate portion 85 and the lower plate portion 83. Has been. The outer edge portion of the lower plate portion 83 is sandwiched between the lower end surface of the inner peripheral side wall 34 of the outer cylinder 3 and the upper end surface of the inner peripheral side wall 92 of the diaphragm ring 9. The inner wall portion 84 and the upper plate portion 85 having a C shape in plan view are opened at positions facing the opening 33 of the outer cylinder 3, and the main liquid chamber 7 </ b> A and the orifice passage 10 are communicated with each other through the opening 33. Yes. The upper plate portion 85 is disposed with a space from the lower plate portion 83, and the outer peripheral surface of the upper plate portion 85 is in close contact with the inner peripheral surface of the outer cylinder 3. The storage chamber 81 has a C-shape in plan view surrounded by the lower plate portion 83, the inner wall portion 84, the upper plate portion 85, the end wall portion 86, and the inner peripheral side wall 34 (coating rubber 35) of the outer cylinder 3. It is space. The lower plate portion 83 is formed with a communication hole 87 that allows the storage chamber 81 and the auxiliary liquid chamber 7B to communicate with each other, and the upper plate portion 85 has a communication that allows the storage chamber 81 and the main liquid chamber 7A to communicate with each other. A hole 88 is formed.

  The movable member 82 is an elastically deformable membrane in which the liquid pressure of the main liquid chamber 7A or the sub liquid chamber 7B acts via the communication holes 87 and 88, and the liquid pressure in the main liquid chamber 7A or the sub liquid chamber 7B. It absorbs fluctuations. More specifically, the movable member 82 is formed in a C shape in plan view extending along the storage chamber 81. When the movable member 82 receives an idling vibration having a relatively high frequency generated during idling operation of the vehicle, that is, a frequency higher than the above-described low frequency range (for example, 13 Hz to 40 Hz) to the vibration isolator 1, It is tuned to absorb fluid pressure fluctuations in the main liquid chamber 7A and the sub liquid chamber 7B.

  Next, the manufacturing method of the vibration isolator 1 which consists of an above-described structure is demonstrated.

  First, a process of forming a main rubber composed of the outer cylinder 3, the inner cylinder 4, and the rubber elastic body 5 is performed. More specifically, the outer cylinder 3 and the first and second reinforcing plates 43 and 44 are disposed at predetermined positions in the inner cylinder 4 and the rubber elastic body 5, respectively. An adhesive is applied to the rubber bonding portions of the reinforcing plates 43 and 44, respectively. Thereafter, vulcanized rubber is poured into the mold to vulcanize and mold the inner cylinder 4 and the rubber elastic body 5, and the rubber elastic body 5 and the covering rubber 35, the bounce contact portion 45, the rebound contact The contact portions 46 are each vulcanized. Then, the mold is removed after the inner cylinder 4 and the rubber elastic body 5 are cured. Thereby, the main body rubbers 3, 4, and 5 are manufactured.

  Next, the process of assembling the partition member 8 to the outer cylinder 3 is performed. More specifically, the upper plate portion 85 of the partition member 8 is press-fitted inside the lower portion of the outer cylinder 3, and the upper surface of the outer edge portion of the lower plate portion 83 of the partition member 8 is below the inner peripheral side wall 34 of the outer tube 3. It is made to contact | abut to an end surface (covering rubber 35).

Next, the process of assembling the diaphragm member comprising the diaphragm 6 and the diaphragm ring 9 to the outer cylinder 3 is performed.
More specifically, the diaphragm 6 is first formed inside the diaphragm ring 9 in advance. Specifically, after an adhesive is applied to the rubber bonding portion of the diaphragm ring 9, the diaphragm 6 is vulcanized inside the annular diaphragm ring 9, and the surface of the diaphragm ring 9 is covered with a covering rubber 94 and a seal rubber 12. Are respectively vulcanized and molded to produce diaphragm members 6 and 9.

  Then, the diaphragm members 6 and 9 are arranged on the lower side of the outer cylinder 3 so that the resin convex portion 3d of the outer cylinder 3 is brought into contact with the welding joint surface 9b of the diaphragm ring 9 and the seal rubber 12 of the diaphragm ring 9 The elastic convex portion 12 a is brought into contact with the seal joint surface 3 a of the outer cylinder 3. As a result, the outer edge portion of the lower plate portion 83 of the partition member 8 is sandwiched between the lower end surface of the inner peripheral side wall 34 of the outer cylinder 3 and the upper end surface of the inner peripheral side wall 92 of the diaphragm ring 9 so that the partition member 8 is sandwiched. Is done.

  After that, while applying compressive force to the overlapped diaphragm ring 9 and outer cylinder 3, the interface portion between the welded joint surface 9b of the diaphragm ring 9 and the welded joint surface 3b of the outer cylinder 3 is ultrasonically melted, thermally melted, and By melting by any one method of laser melting, the welding joint surface 9b of the diaphragm ring 9 and the welding joint surface 3b of the outer cylinder 3 are welded. Thereby, the outer cylinder 3 and the diaphragm ring 9 are integrated. At this time, since the seal area 11A is disposed radially inward from the weld area 11B, it is easy to perform the welding work from the outer peripheral side of the outer cylinder 3 and the diaphragm ring 9, and the influence of this welding work on the seal rubber 12 Less is. In particular, a step is formed on the lower end surface of the outer cylinder 3 and the upper end surface of the diaphragm ring 9, and the welding region 11B is disposed above the seal region 11A. Therefore, the resin melted in the welding region 11B It is difficult to flow into the seal area 11A. Moreover, the resin convex part 3d is protrudingly provided by the welding joining surface 3b of the outer cylinder 3, and when the welding joint surface 9b of the diaphragm ring 9 and the welding joining surface 3b of the outer cylinder 3 are welded, the resin convex part 3d Is melted, the weld joint surface 9b of the diaphragm ring 9 and the weld joint surface 3b of the outer cylinder 3 are easily welded. Further, the resin convex portion 3d of the outer cylinder 3 is melted, whereby the distance between the outer cylinder 3 and the diaphragm ring 9 is narrowed, and the elastic convex portion 12a of the seal rubber 12 is pressed against the seal joint surface 3a of the outer cylinder 3. Elastically crushes and deforms. As a result, a precompression force acts on the seal rubber 12 interposed between the seal joint surface 3a of the outer cylinder 3 and the seal joint surface 9a of the diaphragm ring 9, and the seal rubber 12 acts on the seal joint surface 3a of the outer cylinder 3 and the diaphragm. The ring 9 is in close contact with the seal joint surface 9a. Further, by assembling the diaphragm ring 9 to the outer cylinder 3 as described above, the orifice passage 10 including the concave groove 32 of the outer cylinder 3 and the concave groove 91 of the diaphragm ring 9 is formed. Further, the outer cylinder 3 is pressed from below by a diaphragm ring 9 that holds the diaphragm 6. That is, the diaphragm 6 is assembled to the lower side of the outer cylinder 3 by assembling the diaphragm ring 9 to the outer cylinder 3.

  Next, a process of fitting the main body rubbers 3, 4, and 5, to which the partition member 8 and the diaphragm members 6 and 9 are assembled, inside the accommodation hole 20 of the bracket member 2 is performed. More specifically, the upper portion of the outer cylinder 3 is inserted into the inside of the small-diameter hole 20b of the housing hole 20 of the bracket member 2 while the protrusion 26 of the bracket member 2 is inserted into the through hole 97 of the diaphragm ring 9, and the bracket member The diaphragm members 6 and 9 are arranged inside the large-diameter hole 20a of the second accommodation hole 20. At this time, the rebound contact portion 46 contacts the lower surface of the contact portion 24 a of the rebound side stopper portion 24, and the outer cylinder 3 is pushed upward relative to the bracket member 2. As a result, the rubber elastic body 5 is compressed, and a pre-compression force acts on the rubber elastic body 5. Further, the upper end surface of the outer cylinder 3 is brought into contact with the engaging portion 25 of the bracket member 2, and the lower flange portions 96 </ b> A, 96 </ b> B, 96 </ b> C of the diaphragm ring 9 are pressed against the lower surface of the holder portion 21.

  Next, a step of melting the protrusion 26 described above to form a diameter-expanded portion 26 a having a diameter larger than the inner diameter of the through-hole 97 at the tip of the protrusion 26 protruding from the through-hole 97 is performed. More specifically, the protruding portion 26 is melted by any one method of ultrasonic melting, thermal melting, and laser melting, and the enlarged diameter portion 26 a is formed at the tip of the protruding portion 26. As a result, the resin protrusion 26 is properly melted, and a desired diameter-expanded portion 26 a is formed at the tip of the protrusion 26. Due to the enlarged diameter portion 26 a, the diaphragm ring 9 is pressed from below and is restricted from moving downward relative to the bracket member 2 of the diaphragm ring 9. Thus, the diaphragm ring 9 and the outer cylinder 3 are sandwiched between the locking portion 25 and the enlarged diameter portion 26a in a state where the diaphragm ring 9 and the outer cylinder 3 are overlapped.

Next, a step of enclosing the liquid in the liquid chamber 7 is performed. More specifically, a liquid is injected into the liquid chamber 7 from a liquid inlet (not shown) to fill the liquid chamber 7, and then the liquid inlet 7 is closed to seal the liquid chamber 7. At this time, since the elastic convex portion 12a of the seal rubber 12 is brought into close contact with the lower end surface of the outer cylinder 3, the sealing performance between the outer cylinder 3 and the diaphragm ring 9 is improved.
As described above, the vibration isolator 1 is manufactured.

  According to the vibration isolator 1 having the above-described configuration, since the bracket member 2, the outer cylinder 3, and the diaphragm ring 9 are each made of resin, it is possible to reduce the weight of the vibration isolator 1 compared to the case of metal. it can.

  Further, since the seal rubber 12 is interposed between the seal joint surface 3a of the outer cylinder 3 and the seal joint surface 9a of the diaphragm ring 9, the joint between the outer cylinder 3 and the diaphragm ring 9 can be reliably sealed. it can. In particular, an elastic convex portion 12 a that can be elastically deformed is formed on the seal rubber 12, and the elastic convex portion 12 a is pressed against the seal joint surface 3 a of the outer cylinder 3 to be elastically crushed and deformed to seal the outer cylinder 3. Since it is in close contact with the joint surface 3a, it is possible to ensure high sealing performance at the joint between the outer cylinder 3 and the diaphragm ring 9.

Further, the seal region 11A is disposed radially inward from the welding region 11B, and since there is little influence on the seal rubber 12 by the welding operation in the welding region 11B, the sealing rubber 12 is not damaged by the welding operation, It is possible to prevent the sealing rubber 12 from being deteriorated in sealing performance.
Further, when the melted resin flows into the seal region 11A, the seal rubber 12 is damaged, or the resin is sandwiched between the seal joint surface 3a of the outer cylinder 3 and the seal joint surface 9a of the diaphragm ring 9, thereby reducing the sealing performance. However, by providing the stepped portions 3c and 9c between the seal area 11A and the weld area 11B, the resin melted in the weld area 11B is difficult to flow into the seal area 11A, so that the sealing property of the seal rubber 12 is deteriorated. Can be prevented.

  Further, according to the vibration isolator 1 described above, since the welded joint surface 3b of the outer cylinder 3 and the welded joint surface 9b of the diaphragm ring 9 are welded, the joint between the outer cylinder 3 and the diaphragm ring 9 is made high. The strength can be increased, and the joining force between the outer cylinder 3 and the diaphragm ring 9 is increased, and the outer cylinder 3 and the diaphragm ring 9 can be reliably joined.

  Moreover, according to the above-described vibration isolator 1, since the welding region 11B for performing the welding operation is disposed on the radially outer side, ultrasonic melting or thermal melting from the outer peripheral side of the outer cylinder 3 or the diaphragm ring 9, Laser melting or the like can be performed, and the welding operation between the outer cylinder 3 and the diaphragm ring 9 can be easily performed. Further, a welding projection 3d is projected on the welding joint surface 3b of the outer cylinder 3, and by welding the welding projection 3d, a welding joint surface 3b of the outer cylinder 3 and a welding joint surface 9b of the diaphragm ring 9 are provided. As a result, the welding operation of the outer cylinder 3 and the diaphragm ring 9 can be performed more easily.

  In addition, since the dimensional error of the outer cylinder 3 and the diaphragm ring 9 is absorbed by the seal rubber 12 (elastic convex part 12a) and the resin convex part 3d interposed between the outer cylinder 3 and the diaphragm ring 9, it is caused by the dimensional error. The defect rate can be reduced.

  Further, by assembling the diaphragm ring 9 to the outer cylinder 3, the orifice passage 10 including the concave groove 32 of the outer cylinder 3 and the concave groove 91 of the diaphragm ring 9 is formed, so that another orifice in which the orifice passage is formed is formed. The number of parts can be deleted as compared with the case where members are provided. Thereby, an assembly man-hour and material cost are reduced and cost reduction can be aimed at.

  Moreover, since the outer cylinder 3 is pressed from the lower side by the diaphragm ring 9 that holds the diaphragm 6, the number of parts can be reduced as compared with the case where a pressing member is provided in addition to the diaphragm ring 9. Thereby, an assembly man-hour and material cost are reduced and cost reduction can be aimed at.

As mentioned above, although the embodiment of the vibration isolator according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
For example, in the embodiment described above, an engine (not shown) that is a vibration generation source is connected to the inner cylinder 4 via an engine side bracket, and a vehicle body (not shown) that is a vibration receiving portion is connected to the outer cylinder 3 as a bracket member. However, in the present invention, the vibration receiving portion is connected to the inner cylinder 4 (second mounting member), and vibration is generated to the outer cylinder 3 (first mounting member) via an engine-side bracket or the like. The sources may be connected.

  Moreover, although the above-described embodiment describes the vibration isolator 1 that is applied as an engine mount of a vehicle, the vibration isolator according to the present invention can be applied to other than the engine mount. For example, the vibration isolator according to the present invention can be applied as a mount of a generator mounted on a construction machine, or can be applied as a mount of a machine installed in a factory or the like.

  In the above-described embodiment, the inner cylinder 4 extends in a direction perpendicular to the axis L, and the press-fitting portion of the engine side bracket is press-fitted inside the inner cylinder 4. In the invention, the inner cylinder 4 may be disposed coaxially with the outer cylinder 3, or an inner cylinder in which an internal thread portion is formed is provided, and a bracket is attached by screwing a bolt into the internal thread portion. It may be a configuration.

  In the above-described embodiment, the compression type vibration isolator 1 is installed and installed so that the main liquid chamber 7A is positioned on the upper side in the vertical direction and the sub liquid chamber 7B is positioned on the lower side in the vertical direction. Although described, the present invention is a suspension type vibration isolator which is installed and installed so that the main liquid chamber 7A is located on the lower side in the vertical direction and the sub liquid chamber 7B is located on the upper side in the vertical direction. It is also possible to apply to.

  In the above-described embodiment, the diaphragm ring 9 is provided as a pressing member that presses the outer cylinder 3 from the lower side. However, the present invention may be configured to include a pressing member in addition to the diaphragm ring. Is possible. That is, a pressing member is welded to the lower end surface of the outer cylinder 3, a diaphragm ring is disposed below the pressing member, a through hole is formed in the diaphragm ring, and the protruding portion 26 is inserted into the through hole. The structure by which the enlarged diameter part 26a is formed may be sufficient. As a result, the outer cylinder 3, the pressing member, and the diaphragm ring are sandwiched between the locking portion 25 of the bracket member 2 and the enlarged diameter portion 26 a of the protruding portion 26.

In the above-described embodiment, the bracket member 2 is made of resin. However, in the present invention, the bracket member 2 can be formed of a material other than resin. For example, a metal bracket member 2 is used. It is also possible.
Further, according to the present invention, reinforcing fibers such as glass fibers can be mixed into the resin material of the bracket member 2, the outer cylinder 3, and the diaphragm ring 9. For example, the outer cylinder 3 and the diaphragm ring 9 are formed of a resin material in which glass fiber is mixed by 50% or more (volume ratio to the resin component). In this case, the outer cylinder 3 and the diaphragm ring 9 can be welded by melting the interface portion between the welding joint surface 3b of the outer cylinder 3 and the welding joint surface 9b of the diaphragm ring 9 using heat or a high-frequency induction heating device. it can.

  Further, in the above-described embodiment, the orifice passage 10 is formed by combining the concave groove 32 of the outer cylinder 3 and the concave groove 91 of the diaphragm ring 9, and the partition member 8 is the main body member 80. Although the movable member 82 is accommodated in the storage chamber 81, the present invention may be provided with an orifice member in which an orifice passage is formed separately, or an orifice passage is formed in the partition member. May be. Further, the vibration isolator of the present invention may be a hydraulic pressure switching type vibration isolator including a partition member provided with a piston, a check valve, or the like, or may be a vibration isolator having another configuration. .

  In the above-described embodiment, the seal rubber 12 is vulcanized and bonded to the seal joint surface 9a of the diaphragm ring 9 (pressing member), and this seal rubber 12 is integrated with the covering rubber 94 and the diaphragm 6 that cover the surface of the diaphragm ring. However, in the present invention, a seal rubber (elastic body) may be vulcanized and bonded to the seal joint surface 3a of the outer cylinder 3 (first mounting member). In this case, the seal rubber can be formed integrally with the rubber elastic body 5. Further, the elastic convex portion protruding from the seal rubber is pressed against the seal joint surface 9a of the diaphragm ring 9 (pressing member) and is elastically crushed and deformed. Further, in the present invention, the seal rubber (elastic body) may not be bonded to either the seal joint surface 3 a of the outer cylinder 3 or the seal joint surface 9 a of the diaphragm ring 9. For example, in a state where an O-ring seal rubber is sandwiched between the seal joint surface 3a of the outer cylinder 3 and the seal joint surface 9a of the diaphragm ring 9, the weld joint surface of the weld joint surface 3b of the outer cylinder 3 and the diaphragm ring 9 It is also possible to weld 9b.

  Further, in the above-described embodiment, the elastic convex portion 12a protrudes from the seal rubber 12, but a flat seal rubber (elastic body) in which no elastic convex portion is formed can be used. For example, a flat seal rubber can be brought into contact with the flat seal joint surface 3a (9a) by a surface, or a convex portion is provided on the seal joint surface 3a (9a) so that the convex portion is flat. It is also possible to make it contact with a suitable seal rubber.

  Further, in the above-described embodiment, the resin convex portion 3d protrudes from the welding joint surface 3b of the outer cylinder 3, but in the present invention, the resin convex portion 3d is formed on the welding joint surface 3b of the outer cylinder 3. Alternatively, a resin convex portion may protrude from the welded joint surface 9b of the diaphragm ring 9, or the resin convex portion may protrude from the welded joint surface 3b of the outer cylinder 3 and the welded joint surface 9b of the diaphragm ring 9, respectively. Alternatively, the welded joint surface 3b of the outer cylinder 3 and the welded joint surface 9b of the diaphragm ring 9 may be formed in a flat shape without a resin convex portion, respectively.

In the above-described embodiment, the seal area 11A is disposed radially inward of the welding area 11B. In the present invention, the seal area 11A is disposed radially outside of the welding area 11B. A configuration is also possible.
Further, in the above-described embodiment, steps are respectively formed on the lower end surface of the outer cylinder 3 and the upper end surface of the diaphragm ring 9, and the seal bonding surface 3 a of the outer cylinder 3 is one step higher than the welding bonding surface 3 b of the outer cylinder 3. The seal joint surface 9a of the diaphragm ring 9 is formed at a position higher than the seal joint surface 9b of the diaphragm ring 9, and the welding region 11B is disposed above the seal region 11A. However, according to the present invention, the seal joint surface 3a of the outer cylinder 3 is formed at a position higher than the welding joint surface 3b of the outer cylinder 3, and the seal joint surface 9a of the diaphragm ring 9 is the seal joint surface 9b of the diaphragm ring 9. It is also possible to adopt a configuration in which the seal region 11A is disposed above the welding region 11B. Further, the present invention can be configured such that no step is formed on the lower end surface of the outer cylinder 3 and the upper end surface of the diaphragm ring 9, and the seal region 11A and the weld region 11B are formed flat. .

  In the above-described embodiment, the weld joint surface 3b of the outer cylinder 3 and the weld joint surface 9b of the diaphragm ring 9 are formed in parallel with the vertical surface of the axis L. It is also possible to adopt a configuration in which the weld joint surface 3b and the weld joint surface 9b of the diaphragm ring 9 are orthogonal or inclined with respect to the vertical plane of the axis L.

  Further, in the above-described embodiment, after the main body rubbers 3, 4, 5 are assembled to the bracket member 2, the liquid is sealed in the liquid chamber 7, but in the present invention, the welding joint surface 9 b of the diaphragm ring 9 is used. And the welded joint surface 3b of the outer cylinder 3 are welded so that the outer cylinder 3 and the diaphragm ring 9 are integrated, and then a liquid is sealed in the liquid chamber 7, and then the main body rubbers 3, 4, 5 described above are sealed. Is inserted into the housing hole 20 of the bracket member 2, and the protrusion 26 of the bracket member 2 is melted to form the enlarged diameter portion 26 a at the tip of the protrusion 26 protruding from the through hole 97 of the diaphragm ring 9. Good.

Further, in the above-described embodiment, the plane orthogonal type bracket member 2 having the leg portions 22 parallel to the vertical plane of the axis L is used. However, in the present invention, the leg portions inclined with respect to the axis L are used. It is also possible to use a bracket member having the same.
In the above-described embodiment, the bracket member 2 having the two leg portions 22A and 22B is used. However, the present invention can also use a bracket member having three or more leg portions.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is a top view of the vibration isolator seen from the upper direction for demonstrating embodiment of this invention. It is sectional drawing between AA shown in FIG. It is sectional drawing between BB shown in FIG. It is a top view of the vibration isolator seen from the downward direction for demonstrating embodiment of this invention. It is a fragmentary sectional view for demonstrating embodiment of this invention.

Explanation of symbols

1 Vibration isolator 2 Bracket member 3 Outer cylinder (first mounting member)
3a Seal joint surface (joint surface)
3b Welded joint surface (joint surface)
3d Resin convex part 4 Inner cylinder (second mounting member)
5 Rubber elastic body 6 Diaphragm 7 Liquid chamber 7A Main liquid chamber 7B Sub liquid chamber 8 Partition member 9 Diaphragm ring (pressing member)
9a Seal joint surface (joint surface)
9b Welded joint surface (joint surface)
10 Orifice passage 11 Joint 11A Seal area 11B Weld area 12 Seal rubber (elastic body)
12a Elastic convex part 32 Concave groove 91 Concave groove

Claims (7)

A resin-made annular first mounting member connected to any one of the vibration generating portion and the vibration receiving portion;
A second attachment member coupled to either one of the vibration generating portion and the vibration receiving portion;
A rubber elastic body that elastically connects the first mounting member and the second mounting member and closes an opening end on one axial direction of the first mounting member;
A diaphragm for closing the opening end on the other side in the axial direction of the first mounting member;
A liquid chamber formed between the rubber elastic body and the diaphragm and filled with a liquid, a main liquid in which a part of a partition wall is formed of the rubber elastic body and the internal volume changes due to deformation of the rubber elastic body. A partition member that divides the chamber and a secondary liquid chamber in which a part of the partition wall is formed of the diaphragm;
In the vibration isolator with
A resin-made annular pressing member that is superimposed on the other side of the first mounting member and presses the first mounting member from the other side;
In the joint between the first mounting member and the pressing member,
A seal region in which an elastic body capable of elastic deformation is interposed over the entire circumference between the joint surface of the first mounting member and the joint surface of the pressing member;
A welded region in which the joint surface of the first mounting member and the joint surface of the pressing member are melted to weld the joint surfaces;
Are arranged side by side in the radial direction of the first mounting member. The vibration isolator according to claim 1, wherein
The anti-vibration device according to claim 1, wherein the seal area is disposed on the inner side in the radial direction than the welding area. The vibration isolator according to claim 1 or 2,
The joint surface of the first mounting member and the joint surface of the pressing member are each formed with a step that forms a step in the radial direction so as to mesh with each other,
One of the sealing area and the welding area is disposed on the one side with respect to the other, and the vibration isolator. In the vibration isolator in any one of Claim 1 to 3,
At least one of the joining surface of the first mounting member in the welding region and the joining surface of the pressing member in the welding region is provided with a resin convex portion, and the resin convex portion is melted to cause the resin in the welding region. An anti-vibration device, wherein a joint surface of the first mounting member and a joint surface of the pressing member in the welding region are welded. In the vibration isolator in any one of Claim 1 to 4,
An elastic convex portion is formed on the elastic body, and the elastic convex portion is pressed against the joint surface of the first mounting member in the seal region or the joint surface of the pressing member in the seal region, and is elastically crushed and deformed. An anti-vibration device characterized in that The vibration isolator according to any one of claims 1 to 5,
A pair of concave grooves extending in the circumferential direction of the first mounting member and facing each other are formed on the end surfaces of the first mounting member and the pressing member facing each other,
An anti-vibration device characterized in that an orifice passage for communicating the main liquid chamber and the sub liquid chamber is formed by the pair of concave grooves. The vibration isolator according to any one of claims 1 to 6,
As the pressing member, an annular diaphragm ring is provided,
The vibration isolator is characterized in that the diaphragm is stretched inside the diaphragm ring so as to close the inside of the diaphragm ring.

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