WO2002016800A1 - Dispositif d'amortissement des vibrations a joint liquide - Google Patents

Dispositif d'amortissement des vibrations a joint liquide Download PDF

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Publication number
WO2002016800A1
WO2002016800A1 PCT/JP2001/003420 JP0103420W WO0216800A1 WO 2002016800 A1 WO2002016800 A1 WO 2002016800A1 JP 0103420 W JP0103420 W JP 0103420W WO 0216800 A1 WO0216800 A1 WO 0216800A1
Authority
WO
WIPO (PCT)
Prior art keywords
fitting
elastic body
rubber elastic
cylindrical
peripheral surface
Prior art date
Application number
PCT/JP2001/003420
Other languages
English (en)
Japanese (ja)
Inventor
Hideo Tadano
Hiroaki Takahashi
Original Assignee
Toyo Tire & Rubber Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire & Rubber Co., Ltd. filed Critical Toyo Tire & Rubber Co., Ltd.
Publication of WO2002016800A1 publication Critical patent/WO2002016800A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/387—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type comprising means for modifying the rigidity in particular directions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3842—Method of assembly, production or treatment; Mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
    • F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
    • F16F13/14—Units of the bushing type, i.e. loaded predominantly radially

Definitions

  • the present invention relates to a vibration damping device used for a suspension bush or an engine mount of an automobile, and more particularly to a liquid filling type vibration damping device in which a vibration damping liquid is sealed.
  • this anti-vibration device consists of an inner cylinder (1) and an outer cylinder.
  • (1) and the outer tube fitting (2) are attached to the vehicle body and the suspension link (not shown), respectively, and the vibration between them is reduced by the rubber elasticity of the end wall (3) and the liquid chamber (3). 4) It absorbs by viscous resistance of the liquid inside.
  • the rubber elastic body constituting each end wall (3) (3) on both sides is vulcanized and bonded to the outer peripheral surface of the inner cylindrical fitting (1), and the outer peripheral surface of the rubber elastic body is formed.
  • the surface is vulcanized and bonded to an intermediate bracket (6).
  • the outer cylinder fitting (2) is usually used by being press-fitted and fixed to a mating member such as a suspension link.
  • a mating member such as a suspension link.
  • the mating member has been changed to aluminum. It is being studied to form the outer cylinder fitting (2) with the same aluminum.
  • the intermediate fitting (6) be formed of an iron-based material from the viewpoint of reduction in manufacturing cost. If this is attempted, the above-mentioned conventional vibration isolator causes the following problems.
  • the present invention has been made in view of the above, and it is possible to reliably prevent electrolytic corrosion of an intermediate metal fitting or an outer cylindrical metal fitting even when an electrolytic solution such as salt water adheres, and furthermore, to prevent the outer peripheral surface of the intermediate metal fitting from being damaged.
  • An object of the present invention is to provide a liquid-filled type vibration damping device that has an excellent sealing effect with an outer tube fitting and can maintain good vibration damping characteristics.
  • the present invention that solves the above-mentioned problem is arranged on both ends of the inner cylindrical metal fitting and the outer peripheral side thereof.
  • a liquid-filled vibration isolator in which a liquid chamber is formed between both end walls made of rubber elastic material is sealed between the two end portions of the placed outer cylindrical metal fitting.
  • the rubber elastic body of each end wall is vulcanized and adhered to the outer peripheral surface of the inner cylindrical fitting, and is made of a metal different from that of the outer cylindrical fitting and is substantially in the liquid chamber between the cylindrical parts at both ends.
  • An intermediate metal fitting having a corresponding opening is vulcanized and adhered to the outer peripheral surface of the rubber elastic body, and the inner unit formed in this way is inserted into the outer cylindrical metal fitting.
  • the rubber elastic body of each end wall is wound around the axially outer end of the intermediate metal fitting and is wound around the outer end.
  • the axially outer end of the middle fitting and the swaged end of the outer fitting are formed by the extension of the rubber elastic body.
  • the gap is sealed, and at least one of the axially outer end of the intermediate fitting and the axially inner end of the cylindrical portion is extended around the outer peripheral surface of the cylindrical portion by extending the extended portion of the rubber-like body.
  • a ridge portion of a ridge in the circumferential direction is formed on the outer periphery of the extending portion which is wrapped around the outer peripheral surface, and the ridge line portion is tightly sealed to the inner peripheral surface of the outer cylindrical fitting to seal.
  • the inner peripheral surface side of the intermediate fitting is completely covered with the rubber elastic body, and the rubber elastic body is provided between the axial outer end of the intermediate fitting and the swaged end of the outer cylindrical fitting. It is sealed by the extension of the body, so that the intermediate metal fitting is not exposed to the outside, so that the electrolyte such as salt water does not adhere to the intermediate metal fitting and the contact portion between the intermediate metal fitting and the outer cylindrical metal fitting. No electrolytic corrosion occurs.
  • the extended portion of the rubber elastic body wrapped around the outer periphery of the cylindrical portion at both ends of the intermediate fitting is strongly adhered to the inner peripheral surface of the outer tubular fitting by linear contact with the ridge line of the ridge on the outer periphery.
  • the gap between the inner peripheral surface of the outer cylinder fitting and the cylindrical part of the intermediate fitting can be reliably and satisfactorily maintained in a sealed state, the liquid leakage in the liquid chamber can be prevented, and the vibration isolating property can be maintained satisfactorily.
  • the present invention also provides the liquid-filled type vibration damping device, wherein the extension portion of the rubber elastic body that does not go around the outer peripheral surface at both the axially outer end of the intermediate fitting and the axially inner end of the cylindrical portion.
  • the diameter of the cylindrical portion is reduced via the front extension portion by the reduction of the diameter of the outer metal fitting.
  • the extended portion of the rubber elastic body is securely in close contact with the outer tube fitting to achieve a good sealing action, reliably prevent liquid leakage, and furthermore, the middle portion of the cylindrical portion of the intermediate member and the outer tube fitting. Since the gaps can be kept in a non-contact state, even if the electrolytic solution invades between the intermediate fitting and the outer casing, there is no possibility that electrolytic corrosion occurs in the intermediate fitting and the outer casing.
  • the present invention provides the liquid-filled type vibration damping device, wherein the rubber elastic body is formed so that only one of the axially outer end of the intermediate metal fitting and the axially inner end of the cylindrical portion extends around the outer peripheral surface.
  • An extension is provided, and one side thereof is reduced in diameter by the extension of the outer cylinder through the extension.
  • the extended portion of the rubber elastic body is securely brought into close contact with the outer cylindrical metal fitting to achieve a good sealing action, and it is possible to more reliably prevent the liquid from leaking.
  • the cylindrical portion By forming the cylindrical portion into a tapered shape, the cylindrical portion also functions to prevent the metal tube from coming off in the axial direction.
  • FIG. 1 is a sectional view showing one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the same.
  • FIG. 3 is a cross-sectional view showing the same embodiment in a state before assembly.
  • FIG. 4 is a sectional view showing still another embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing still another embodiment of the present invention.
  • FIG. 6 is an explanatory diagram of a mold used for carrying out the present invention.
  • FIG. 7 is a perspective view of the middle mold of the mold in FIG.
  • FIG. 8 is a front view of an internal unit of the liquid-filled type vibration damping device according to the present invention.
  • FIG. 9 is a sectional view taken along line AA of FIG.
  • FIG. 10 is a cross-sectional view showing a conventional technique.
  • FIGS. 1 and 2 show a liquid filled type vibration damping device according to the present invention.
  • the vibration damping device is formed in a substantially columnar shape as a whole, and is made of an inner cylindrical fitting (11) and an aluminum-made fitting disposed on the outer peripheral side thereof.
  • the outer cylinder fitting (12) is connected at both axial ends by a pair of end walls (13) (13) made of rubber elastic material.
  • a liquid chamber (14) filled with a liquid such as silicone oil is formed at two locations facing each other across the inner cylinder fitting (11) (the liquid chamber 14 in FIG. 1 shows only one of them).
  • These liquid chambers (14) (14) communicate with each other by an orifice (15) described later.
  • the orifice (15) allows the liquid to flow between the liquid chambers (14) and (14) when the inner cylinder (11) and the outer cylinder (12) are vertically displaced relative to each other.
  • the input vibration is attenuated by applying resistance to the liquid.
  • the rubber elastic body constituting each end wall (13) (13) on both sides is integrated in the outer peripheral region of the inner cylinder fitting (11), and the inner peripheral surface of the rubber elastic body is the inner cylinder. It is vulcanized and bonded to the outer peripheral surface of the metal fitting (11) during the molding.
  • the following metal fittings (16) made of iron-based metal are vulcanized and bonded to the outer peripheral surface of the rubber elastic body.
  • the intermediate fitting (16) includes two cylindrical portions (16a) and (16b) at both ends which are vulcanized and bonded to the outer peripheral surface of the end walls (13) and (13), and these cylindrical portions (16a) An opening substantially corresponding to the liquid chamber (14) (14) is formed between (16b). And a pair of beam portions (16c) connected to each other so that each beam portion (16c) has a reduced diameter mainly at the center portion with respect to the outer peripheral surfaces of both cylindrical portions (16a) (16b). It has an arc shape.
  • Each of the beam portions (16c) forms a passage having a rectangular cross section with the inner peripheral surface of the outer cylinder fitting (12), and the passage communicates with the orifice (15) communicating between the liquid chambers (14) and (14). ).
  • the inner peripheral side of the beam part (16c) is continuously vulcanized to the rubber elastic body of the partition part (35) (35) separating the liquid chambers (14) (14) from the end wall (13). Glued.
  • the inner unit in which the inner cylinder fitting (11) and the intermediate fitting (16) are integrally bonded to the rubber elastic body of the end wall (13) as described above is filled in the liquid chamber (14).
  • the end of the outer cylinder (12) in the axial direction is squeezed. It is integrated with the outer tube fitting (12) by caulking.
  • the rubber elastic body of the end wall (13), which is vulcanized and bonded to the intermediate fitting (16), wraps around the axially outer end of the intermediate fitting (16) as shown in FIG.
  • the extended portion (17) of the rubber elastic body covers from the inner peripheral surface of the intermediate fitting (16) to the vicinity of the outer peripheral corner at the axially outer end of the intermediate fitting (16). This extension (17) is, as described above,
  • the extending portion (17) extends from the outer end (19) of the intermediate fitting (16) to the outer peripheral surface, that is, the cylindrical portion (16a).
  • (17a) indicates an extended portion that is wrapped around the outer peripheral portion.
  • the part (17a) is provided with a ridge line part (17b) of a ridge that is continuous in the circumferential direction on the outer periphery, so that the part (17a) can be strongly adhered to the outer cylinder fitting (12) in line contact, so that the sealing action is good. To be able to fulfill.
  • the intermediate metal fitting (16) and the outer metal fitting ( 12) in a non-contact manner, and a good seal can be maintained between the inner peripheral surface of the outer tube fitting (12) and the cylindrical portions (16a) (16b) of the intermediate fitting (16). I have.
  • the above effect can be obtained only by the extending portion (17a).
  • the rubber elastic body is moved from the inner end surface (34) to the outer peripheral surface.
  • extension (18a) An extension is formed so as to be hung around (22b), and (18a) indicates an extension part wrapped around its outer periphery.
  • the extended portion (18a) is formed continuously over the entire circumference including the continuous portion of the cylindrical portions (16a) (16b) and the beam portion (16c).
  • a ridge line (18b) of a ridge that is continuous in the circumferential direction is provided on the outer periphery of the extension (18a) in the same manner as described above, and a sealing action between the extension and the outer cylinder (12) is provided. To be able to perform well.
  • the inner extension is provided.
  • the portion (18a) and the outer extending portion (17a) can favorably maintain a sealed state between the cylindrical portion (16a) (16b) of the intermediate fitting (16) and the outer tubular fitting (12), Liquid leakage can be reliably prevented.
  • the cylindrical portion (16a) (16b) of the intermediate fitting (16) and the outer tubular fitting (12) can be completely kept in a non-contact state, the rubber elastic body may be damaged. Even if the intermediate metal fittings (16) may come into contact with the electrolyte due to electrical shock, electrolytic corrosion of the outer metal fittings (12) is prevented.
  • the cylindrical part (16a) of the intermediate cylinder (16) is wrapped around the outer peripheral surface from the inner end surface (34) only on the axial inner end side of (16b).
  • the extended portion (18a) wrapped around the outer periphery is provided with a ridge portion (18b) of a ridge that is continuous in the circumferential direction on the outer periphery, so that the sealing action can be satisfactorily performed.
  • the outer cylindrical fitting (12) is drawn and reduced in diameter, so that the axially inner end face (34) of the cylindrical portion (16a) (16b) of the intermediate fitting (16). Side is reduced in diameter through the extension portion (18a) of the rubber elastic body, and becomes in a state of being tapered.
  • the extension (17) can seal between the outer end surface (19) of the intermediate metal fitting (16) and the caulked end (12a) of the outer metal fitting (12).
  • the extended portion (18a) that has been in contact with the outer tube fitting (12) can securely seal the liquid chamber (14).
  • the tapered shape of the cylindrical portions (16a) and (16b) of the intermediate fitting (16) can also prevent the outer tubular fitting (12) from coming off in the axial direction.
  • the inner unit is attached to the mold (20) by the inner cylinder fitting (11) and It is manufactured by setting the intermediate metal fittings (16), and vulcanizing and molding the rubber elastic bodies constituting the end walls (13) (13) in the mold (20).
  • the mold (20) includes an upper mold (20a) and a lower mold (20b) that open and close in the axial direction of the intermediate metal fitting (16), that is, the vertical direction in FIG.
  • the procedure for closing the mold (20) is as follows: First, the lower mold in which the inner cylinder fitting (11) and the intermediate fitting (16) are set.
  • the upper die (20a) and the lower die (20b) are provided with substantially frustoconical protrusions (25) that are in contact with the entire inner peripheral surface of the end of the inner cylindrical fitting (11).
  • the inner cylindrical fitting (11) is positioned by the projection (25). The distal end of the projection (25) does not come into contact with the inner peripheral surface of the inner tube fitting (11).
  • the upper die (20a) and the lower die (20b) have the outer edges of the cylindrical portions (16a) (16b) of the intermediate metal fitting (16), which are the axial outer ends of the intermediate metal fitting (16).
  • Each of the cylindrical recesses (21a) and (21b) to be accommodated is formed, but these recesses (21a) and (21b) are formed slightly larger in diameter than the cylindrical portions (16a) and (16b).
  • the distance between the bottom surfaces of the concave portions (21a) and (21b) when the mold is closed is formed to be slightly longer than the length of the intermediate fitting. That is, in the upper die (20a) and the lower die (20b), the positioning of the intermediate bracket (16) is not performed.
  • the positioning of the intermediate bracket (16) is performed by a pair of middle dies (20c) (20c).
  • a medium-sized piece is attached to the inner end face (34) of the cylindrical part (16a) (16b) of the intermediate fitting (16).
  • (20c) By contacting a part of The positioning of the bracket (16) in the mold (20) is performed.
  • the medium size (20c) will be described in detail with reference to FIG. Note that the medium size (20c) and (20c) of the pair have substantially the same shape, and for convenience, the medium size (20c) on the right side in FIG. 6 will be described as an example.
  • the middle mold (20c) has a curved surface (24c) along the outer peripheral surface (22a) (22b) of the cylindrical portion (16a) (16b) and the outer peripheral surface (22c) of the beam portion (16c) of the intermediate fitting (16). ).
  • the beam (16c) of the intermediate fitting (16) is sandwiched, and is located between the two cylindrical parts (16a) (16b), and on the inner peripheral side of the intermediate fitting (16).
  • a pair of bulging portions (26) (26) protruding toward each other are formed.
  • the bulges (26) and (26) define a liquid chamber (14) between the inner unit and the outer tube fitting (12) when they are assembled.
  • elongated projections (32) having a substantially rectangular cross section are provided in the opening and closing direction of the medium-sized (20c), that is, in the left-right direction in FIG. It is formed.
  • the thickness of the bulging portion (26) is the thickest at the base end on the curved surface (24) side, and gradually becomes thinner toward the inner circumferential end of the cylindrical portion (16a) (16b). (See part B in Fig. 6). Specifically, of the protrusions (32) and (32), only the portion near the curved surface (24) (see the portion C in FIG. 6) is the inner end face of each of the cylindrical portions (16a) and (16b) facing each other. (34) The thickness of each bulging portion (26) is set so as to abut the end face located on the liquid chamber (14) side, that is, the end face located on the liquid chamber (14) side.
  • portions of the medium-sized (20c) adjacent to the curved surface (24) are located above and below the bulging portions (26) and (26) in FIG. 7, respectively, and have cylindrical portions (16a) and (16b).
  • Opposing portions (38a) and (38b) are formed on the outer peripheral surfaces (22a) and (22b), respectively.
  • the upper edge (41) of the opposing portion (38a) and the lower edge (42) of the opposing portion (38b), which are both ends in the vertical direction in FIG. 7, are cut into a tapered shape over the entire circumference. It is configured so that even if the middle dies (20c) and (20c) are closed, they are separated from the two cylindrical portions (16a) and (16b).
  • the upper edge (41) and the lower edge (42) are respectively formed by the concave portions (21a) (21a) of the upper mold (20a) and the lower mold (20b).
  • a cavity is defined to form an extension (17a) contiguous with 21b). That is, the outer edges of the cylindrical portions (16a) and (16b) are separated from the mold when the mold is closed.
  • the rubber elastic body corresponding to the extension (18a) is also vulcanized and bonded to the edge on the (14) side, that is, the outer periphery of the inner edge (34) on the cylindrical portion (16a) (16b). It is configured as follows.
  • the upper edge (41), the lower edge (42), and the concave groove (40) corresponding to the inner edge are formed by extending the outer edge and the inner edge of the cylindrical portion (16a) (16b). It is formed so as to form a shape corresponding to the outer shape having the ridge portions (17b) and (18b) of the protruding portions (17a) and (18a).
  • (43) is an orifice projection forming an orifice.
  • each projection (32) is in contact with the inner end surface (34) of the cylindrical portion (16a) (16b), so that each inner end surface (34) ( 34) is exposed.
  • the extending portion (18a) that goes around the outer peripheral surface of the cylindrical portions (16a) (16b) is continuous in the circumferential direction.
  • extension (17a) is completely covered by the extension (17a). Further, an extension (18a) is formed at the concave groove (40) (40) at the boundary between the facing part (38a) (38b) and the bulge (26).
  • the projections are formed so that the inner end faces (34) and (34) of (16a) and (16b) are pushed outward from inside toward the axial direction outside of these cylindrical parts (16a) and (16b).
  • the projections (32) are not necessarily provided on both the upper wall (28) and the lower wall (30) of the bulging portion (26).
  • the intermediate fittings are not provided. If (16) is held and fixed, the number can be reduced as appropriate.
  • the opposing portions (38a) and (38b) are removed from the outer peripheral surfaces (22a) and (22b) of the cylindrical portions (16a) and (16b).
  • the rubber elastic body may be completely separated and vulcanized and bonded to the entire outer peripheral surfaces (22a) and (22b).
  • the space between the axially outer end of the intermediate fitting and the caulked end of the outer tubular fitting is sealed by the extension of the rubber elastic body on each end wall.
  • the intermediate metal fitting is not exposed to the outside, and the electrolytic solution such as salt water does not adhere to the contact portion between the intermediate metal fitting and the outer cylindrical metal fitting, so that such electrolytic corrosion can be reliably prevented.
  • the extended portion of the rubber elastic body wrapped around the outer periphery of the cylindrical portion at both ends of the intermediate fitting is strongly adhered to the inner peripheral surface of the outer tubular fitting by linear contact with the ridge line of the ridge on the outer periphery.
  • an extension part of a rubber elastic body wrapped around the outer peripheral surface is provided, and the cylindrical part is extended forward by reducing the diameter of the outer cylindrical metal fitting.
  • the diameter is reduced through the portion, the above-mentioned sealing action is more effectively performed, and both metal fittings can be kept in a non-contact state, so that electrolytic corrosion occurs even if an electrolytic solution enters between the metal fittings. There is no fear.
  • the cylindrical part of the intermediate fitting has a tapered shape, so that it also functions to prevent the external fitting from coming off in the axial direction, and furthermore has excellent durability.
  • the liquid filled type vibration damping device of the present invention is suitably used as a vibration damping device used for a suspension bushing engine mount of an automobile or the like.

Abstract

L'invention porte sur un dispositif d'amortissement des vibrations à joint liquide qui peut empêcher la corrosion électrolytique d'un raccord intermédiaire et d'un raccord externe pour tube, imputable à l'adhésion de l'électrolyte. Ce dispositif a un excellent effet d'étanchéité entre les deux raccords et conserve des caractéristiques antivibratoires satisfaisantes. Selon ce procédé, un corps élastique en caoutchouc formant une paroi terminale (13) est collé, par vulcanisation, sur la surface périphérique externe d'un raccord interne (11) pour tube. Le raccord intermédiaire (16) est collé, par vulcanisation, sur la surface périphérique externe du corps élastique en caoutchouc, ce dernier formant une paroi terminale (13) est déplacé de l'extrémité externe axiale et de l'extrémité interne des deux parties cylindriques terminales du raccord intermédiaire (16) vers la surface périphérique externe de celui-ci. Une unité interne est insérée dans le raccord externe (12) pour tube de façon à réduire le diamètre du raccord externe (12) pour tube, la partie terminale axiale est matée, un vide entre les extrémités matées (12a) du raccord intermédiaire (16) et du raccord externe (12) pour tube étant hermétiquement obturé par la partie d'extension (17) du corps élastique en caoutchouc, et un vide entre le raccord intermédiaire (16) et la surface périphérique interne du raccord externe (12) pour tube est hermétiquement obturé par les parties d'extension (17a) et (18a) déplacées vers la surface périphérique externe, ce qui permet de prévenir les fuites de liquide.
PCT/JP2001/003420 2000-08-25 2001-04-20 Dispositif d'amortissement des vibrations a joint liquide WO2002016800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-256045 2000-08-25
JP2000256045A JP2002070926A (ja) 2000-08-25 2000-08-25 液封入式防振装置

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EP1707842A1 (fr) 2005-03-30 2006-10-04 ZF FRIEDRICHSHAFEN Aktiengesellschaft Manchon à amortissement hydraulique avec étanchéité axiale

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EP1707842A1 (fr) 2005-03-30 2006-10-04 ZF FRIEDRICHSHAFEN Aktiengesellschaft Manchon à amortissement hydraulique avec étanchéité axiale
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