JPH073073Y2 - Cylindrical mounting device - Google Patents

Description

[Technical Field] The present invention relates to a cylindrical mounting device that is preferably used as an engine mount for an automobile, and particularly regulates the relative displacement of the connected body when an excessive vibration load is input. The present invention relates to a cylindrical mount device having a stopper mechanism that operates.

(Background Art) Conventionally, it is interposed between members constituting a vibration transmission system,
As a type of vibration-proof connecting body that connects both members, an inner cylindrical metal member and an outer cylindrical metal member that are arranged at a predetermined distance in the radial direction are connected by a rubber elastic body interposed between them. A so-called cylindrical mount device is known which mainly prevents vibrations input in a predetermined radial direction between the inner and outer cylindrical metal fittings, and is suitably used as, for example, an automobile engine mount or a suspension bush. Has been done.

By the way, in such a cylindrical mount device, when the initial load (preload) is exerted in the main vibration input direction due to the weight of the supported body, the transmission torque between the coupled bodies, etc. at the time of mounting, In order to secure the durability of the rubber elastic body, a space that extends axially through and extends approximately halfway in the circumferential direction between the inner and outer cylindrical metal fittings on the side where tensile deformation is caused in the rubber elastic body by the initial load. It is desirable to relax or prevent the occurrence of tensile stress in the rubber elastic body by forming the.

However, when a particularly large initial load is input, such as in an automobile engine mount, the inner tubular metal fitting is not vacant with respect to the outer tubular metal fitting due to the deformation of the rubber elastic body due to the initial load during mounting. Since the inner dimension of the void is increased due to the large displacement in the radial direction on the opposite side, the inner tubular metal fitting with respect to the outer tubular metal fitting when the excessive vibration load is input under such a mounted state. However, there is a problem that it is difficult to regulate the relative displacement amount in the radial direction (the rebound direction opposite to the acting direction of the initial load) to the space side.

Therefore, the applicant of the present application previously disclosed that, in Japanese Patent Application No. 1-4207, a plate-shaped stopper member, which substantially corresponds to the shape of the inner peripheral surface of the cavity made of a rubber elastic body, should be inserted and arranged in the cavity. By contacting the inner cylindrical metal fitting side inner peripheral surface of the cavity with the inner cylindrical metal fitting side support, the stopper member abuts the outer cylindrical metal fitting side inner peripheral surface of the inner space, so that, as described above, We proposed a stopper mechanism that regulates the amount of relative displacement of the inner tubular fitting in the rebound direction relative to the outer tubular fitting. That is, according to such a stopper mechanism, in consideration of the increase amount of the internal dimension of the void due to the initial load exerted when the mount is mounted, a wall thickness that is larger by a predetermined dimension than the internal dimension of the void when the mount is not mounted is taken into consideration. By inserting the stopper member having it into the space,
The relative displacement amount of the inner and outer tubular metal fittings in the rebound direction when the mount is mounted can be advantageously restricted.

However, as a result of further studies by the inventors of the present application, in the stopper mechanism having such a structure, when the stopper member comes into contact with the inner surface of the cavity, particularly when the vibration input direction is inclined in the mount axis direction. , Noise such as sliding contact noise is likely to occur,
It has become clear that when used as an automobile engine mount, the riding comfort of the vehicle may be impaired. The occurrence of such abnormal noise is considered to be due to a structure in which the stopper member is not completely fixed to the inner tubular metal member side.

Further, in Japanese Patent Application No. 1-4207 described above, the stopper mechanism is applied to a cylindrical mounting device containing a fluid. As described above, a metal sleeve is attached to the outer peripheral surface of the rubber elastic body. Is vulcanized and adhered, and the rubber sleeve is attached to the outer tubular metal fitting by press-fitting the metal sleeve into the outer tubular metal fitting, and the space between the inner tubular metal fitting and the outer tubular metal fitting is Is provided at a portion located on the opposite side in the radial direction with a pocket portion penetrating the metal sleeve and opening to the outer peripheral surface, and by covering the opening of the pocket portion with an outer tubular metal member, a wall is provided in the pocket portion. A part of the portion is formed of the rubber elastic body, which causes a fluctuation in internal pressure at the time of vibration input, and defines a pressure receiving chamber in which a predetermined incompressible fluid is sealed inside, while an inner tubular metal member and an outer portion are formed. Between tube fittings In the portion where the void is located, the metal sleeve is recessed inward in the radial direction, and the inner peripheral surface of the recessed portion of the metal sleeve causes the stopper member to abut the outer tubular metal fitting side of the void. A predetermined incompressibility inside, which constitutes the inner peripheral surface and at least a part of which is formed of a flexible film between the recessed portion of the metal sleeve and the outer tubular metal member to allow a change in volume. A structure having a structure in which an equilibrium chamber in which fluid is enclosed is defined, and further, an orifice passage is provided which connects the pressure receiving chamber and the equilibrium chamber to each other and allows the fluid to flow between the two chambers. In that case, since the stopper member comes into contact with the metal surface, the generation of abnormal noise becomes a greater problem.

(Problem to be Solved) Here, the present invention has been made in the background of the circumstances as described above, and the problem to be solved is as follows.
Equipped with the stopper mechanism as described above, in which the stopper member is inserted and arranged in the space provided between the inner and outer cylindrical metal fittings, and particularly the generation of abnormal noise during displacement regulation by the stopper mechanism is effectively reduced or prevented. It is an object of the present invention to provide a cylindrical mount device that can be used.

(Solution) In order to solve such a problem, in the present invention, an inner tubular metal member and an outer tubular metal member that are concentrically or eccentrically arranged at a predetermined distance in a radial direction from each other are provided. Is connected by a rubber elastic body interposed between the inner cylindrical metal member and the outer cylindrical metal member, and a space is provided between the inner cylindrical metal member and the outer cylindrical metal member so as to penetrate in the axial direction and extend over a substantially half circumference. In the tubular mounting device, a stopper member made of a rubber elastic body having a shape substantially corresponding to the inner peripheral surface shape of the cavity is inserted and arranged in the cavity, and the inner peripheral surface of the cavity on the inner cylinder metal fitting side. By being supported on the inner tubular metal fitting side so as to come into contact with the inner tubular metal fitting, the stopper member comes into contact with the inner peripheral surface of the outer tubular metal fitting side in the vacant space, whereby the inner tubular metal fitting and the outer tubular metal fitting are radiated in the radial direction. While controlling the relative displacement, Of the contact surfaces between the lid member and the inner peripheral surface of the cavity, at least one of the contact surfaces between the stopper member and the inner peripheral surface of the cavity of the outer cylinder fitting side is wrinkled. The feature is that it is provided with unevenness.

Further, according to the present invention, in such a cylindrical mount device, a lubricant is applied to the contact surface of the stopper member and the inner peripheral surface of the void having the wrinkle-like unevenness. What is done is also a feature.

Furthermore, in the present invention, by vulcanizing and adhering a metal sleeve to the outer peripheral surface of the rubber elastic body and press-fitting the metal sleeve into the outer cylinder metal fitting, the rubber elastic body is attached to the outer cylinder metal fitting. And a pocket portion penetrating the metal sleeve and opening to the outer peripheral surface at a portion located between the inner tubular metal fitting and the outer tubular metal fitting on the side opposite to the cavity in the radial direction. By covering the opening of the pocket portion with the outer tubular metal fitting, a part of the wall portion is formed of the rubber elastic body, and internal pressure fluctuation is generated at the time of vibration input. While forming a pressure-receiving chamber in which a permeable fluid is enclosed, at the portion where the void is located between the inner tubular metal fitting and the outer tubular metal fitting, the metal sleeve is recessed radially inward, Metal sleeve The inner peripheral surface of the recessed portion constitutes an outer peripheral metal fitting side inner peripheral surface of the cavity with which the stopper member is brought into contact, and at least one portion is provided between the recessed portion of the metal sleeve and the outer cylindrical metal fitting. A flexible membrane, the volume of which is allowed to change, and a predetermined incompressible fluid is sealed inside to define an equilibrium chamber, and the pressure receiving chamber and the equilibrium chamber are mutually separated. A so-called fluid-containing cylindrical mount device, which is provided with an orifice passage that communicates with each other and allows the fluid to flow between the two chambers, is also a feature of the present invention.

(Effects / Effects) That is, in the cylindrical mount device having the structure according to the present invention as described above, the stopper member inserted and arranged in the space contacts the inner peripheral surface of the outer cylinder fitting side of the space. The frictional resistance at the contact surface is advantageous due to the textured unevenness provided on the contact surface between the stopper member and the inner peripheral surface of the void without hindering the stopper function as described above. Therefore, it is possible to very effectively reduce or prevent the generation of abnormal noise during displacement regulation.

Further, by applying a lubricant to the contact surface having such a wrinkle-like unevenness, the frictional resistance at the contact surface can be more effectively reduced, and an abnormal noise at the time of displacement regulation is generated. The reduction or prevention of the occurrence can be achieved more effectively.

Furthermore, in a fluid-filled type cylindrical mount device in which the inner peripheral surface of the space where the stopper member abuts is a metal surface, according to the present invention, the abutment surface is provided with wrinkle-like irregularities. As a result, the generation of abnormal noise during displacement regulation can be effectively reduced or prevented.

(Embodiment) Hereinafter, in order to more specifically clarify the present invention, an embodiment of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show a concrete example of the present invention applied to an automobile engine mount. In these figures, 10 and 12 are an inner tubular member and an outer tubular member, respectively, which are arranged eccentrically by a predetermined distance in the mount radial direction, and are arranged by a rubber elastic body 14 interposed therebetween. , Are elastically connected to each other. Then, in such an engine mount, the inner tubular metal fitting 10 and the outer tubular metal fitting 12 are attached to each one of the vehicle body side and the power unit side including the engine so that the power unit can be supported in a vibration-proof manner with respect to the vehicle body. In addition, in such an installed state, the weight of the power unit is the initial load, and
When the rubber elastic body 14 is elastically deformed by being exerted in the eccentric direction of 10 and 12, the both metal fittings 10 and 12 are positioned substantially concentrically (see FIG. 10). Further, under such a mounted state, vibration for the purpose of vibration isolation is input to the engine mount in the eccentric direction of the inner tubular metal fitting 10 and the outer tubular metal fitting 12 (vertical direction in FIG. 10). Will be punished.

More specifically, the inner tubular member 10 is formed to have a thick-walled stepped cylindrical shape as a whole, in which the diameter of the central portion in the axial direction is larger than that of both end portions in the axial direction. Further, a metal sleeve 16 having a substantially thin cylindrical shape as a whole is arranged on the outer side of the inner tubular member 10 in the radial direction at a predetermined distance in the radial direction and eccentric by a predetermined dimension. As shown in FIGS. 3 and 4, the rubber elastic body 14 is interposed between the inner cylindrical metal fitting 10 and the metal sleeve 16, and the outer peripheral surface of the inner cylindrical metal fitting 10 is interposed. And an inner peripheral surface of the metal sleeve 16 are formed as an integrally vulcanized molded product 18 which is vulcanized and adhered.

In addition, in the integrally vulcanized molded product 18, the half along the inner peripheral surface of the metal sleeve 16 in the circumferential direction is provided along the inner peripheral surface of the metal sleeve 16 on the side where the separation distance between the inner tubular fitting 10 and the metal sleeve 16 in the eccentric direction is small. A cavity 20 is formed which has a substantially arcuate cross section and extends axially therethrough. Thus, the rubber elastic body 14 substantially elastically connects the inner tubular metal fitting 10 and the outer tubular metal fitting 12 to each other only on the side where the distance in the eccentric direction is large. As described above, the generation of tensile stress when the rubber elastic body 14 is deformed due to the load weight of the power unit exerted under the mounted state as described above can be reduced as much as possible. ing.

Further, the rubber elastic body 14 has a recessed shape that penetrates the metal sleeve 16 and opens on the outer peripheral surface at a position facing the cavity 20 in the radial direction with the inner tubular metal fitting 10 interposed therebetween, A pocket portion 22 is formed. That is, the metal sleeve 16 is provided with the window portion 24 at a position where the metal sleeve 16 is located on the side where the distance in the eccentric direction with respect to the inner tubular metal fitting 10 is large, and the pocket portion 22 is provided through the window portion 24.
However, the outer peripheral surface is opened.

On the other hand, in the metal sleeve 16, the central portion in the axial direction is reduced in diameter over a predetermined width to form a small diameter portion 26. And, in particular, the inner tubular metal fitting in the small diameter portion 26.
A portion located on the side where the distance between the metal sleeve 16 and the eccentric direction in the eccentric direction is small is further recessed inward in the radial direction, and is inserted into the void 20.
There, a recess 28 that opens to the outer peripheral surface is formed, and a circumferential groove 30 that extends in the circumferential direction with the small-diameter portion 26 as the bottom is formed so as to connect both circumferential ends of the recess 28. There is.

Further, as shown in FIG. 5, the integrally vulcanized molded article 18 having such a structure has a cavity 20 which is separately formed of a rubber material inside the cavity 20 as shown in FIG. A stopper rubber 32 having a curved plate shape substantially corresponding to the inner peripheral surface shape of 20 is arranged by being inserted from one side in the axial direction,
An annular mounting portion 34, which is integrally provided on one end side in the longitudinal direction, is externally fitted and fixed to the axial end portion of the inner tubular metal fitting 10, and is bonded as necessary, so that the inner space 20 The inner tubular member 10 is supported on the inner tubular member 10 side while being in contact with the inner peripheral surface 36 of the tubular member.

Further, the stopper rubber 32 is formed with a thickness larger than the dimension between the inner peripheral surfaces of the cavity 20 in the integrally vulcanized molded product 18 in the mount radial direction, as is clear from the figure. By inserting the stopper rubber 32 into the space 20, the rubber elastic body 14 is deformed, and the inner tubular metal member 10
With respect to the outer tubular metal fitting 12, the metal fittings 10 and 12 are displaced by a predetermined amount to the side where the distance between the two metal fittings 10, 12 in the eccentric direction is large. Then, when the mount is mounted, the weight of the engine unit is exerted, and the inner tubular metal fitting 10 is further displaced with respect to the outer tubular metal fitting 12 to the side where the separation distance in the eccentric direction is large, whereby the stopper rubber 32
The outer peripheral metal member side inner peripheral surface 38 of the space 20 is arranged so as to be opposed to each other with a predetermined distance in the vibration input direction (see FIG. 10). By abutting the void 20 on the outer peripheral metal fitting side inner peripheral surface 38,
Therefore, the relative displacement amount of the inner tubular member 10 and the outer tubular member 12 in the rebound direction can be regulated to a predetermined amount. Here, in this embodiment, the stopper rubber is used.
The outer peripheral metal fitting side inner peripheral surface 38 of the space 20 with which the 32 is abutted is constituted by the inner peripheral surface of the small diameter portion 26 forming the bottom wall portion of the recess 28 in the metal sleeve 16.

Further, in this stopper rubber 32, the entire outer circumference of the plate-shaped portion including the contact surface with respect to the inner cylindrical metal fitting side inner peripheral surface 36 of the void 20 and the contact surface with the outer cylindrical metal fitting side inner peripheral surface 38. The surface is provided with wrinkle-like irregularities. The formation of the wrinkle-shaped irregularities on the outer peripheral surface of the stopper rubber 32 is performed by various known methods such as performing satin finish on the mold of the stopper rubber 32. Further, the specific form of such textured unevenness is not limited in any way, in order to advantageously obtain the desired effect of preventing abnormal noise, the unevenness difference is about 0.05 ~ 0.5 mm, preferably 0.1. ~ 0.
It will be set to be about 3 mm.

In addition, the stopper rubber 32 with such a textured unevenness
The outer peripheral surface of, further, over the entire outer peripheral surface of the plate-shaped portion,
A lubricant such as silicone oil or silicone grease is applied. The application of the lubricant may be performed by, for example, immersing the stopper rubber 32 in the lubricant before assembling the stopper rubber 32 to the integrally vulcanized molded product 18, or by applying it to the outer peripheral surface of the stopper rubber 32. On the other hand, it is done by brushing or spraying the lubricant. However, such a lubricant may be applied to the inner peripheral surface of the cavity 20 with which the stopper rubber 32 is brought into contact, in place of or instead of the outer peripheral surface of the stopper rubber 32.

Further, the integrally vulcanized molded product 18 has a metal sleeve 16
The first and second orifice fittings 40 and 42 each having a substantially semi-cylindrical shape are respectively inserted into the circumferential groove 30 in the inner circumferential fitting 30 and the metal sleeve 16 from both sides in the eccentric direction to form a cylindrical shape. The outer cylindrical metal fitting 12 is externally fitted and fixed on the outer peripheral surface thereof.

In the first orifice fitting 40, as shown in FIG. 6 and FIG. 7, the outer peripheral surface of the first orifice fitting 40 expands in a spiral shape from the substantially central portion, and the inner end portion thereof passes through the communication hole 44. While being opened to the inner peripheral surface side, the outer end portion thereof has a concave groove 46 which is opened to the one end side in the circumferential direction.

On the other hand, in the second orifice fitting 42, as shown in FIGS. 8 and 9, notches are formed at both ends in the circumferential direction.
48, 48, and notched windows 50, 50 in the central portion, respectively, further, such notched windows 50, 50 are respectively closed from the inside, so that a flexible film that is easily elastically deformed. The diaphragm 52 is integrally vulcanized and adhered.

The opening of the pocket portion 22 provided in the integrally vulcanized molded product 18 is covered by the first orifice fitting 40, whereby a part of the wall portion inside the pocket portion 22 is covered. Is composed of a rubber elastic body 14, and when a vibration is input between the inner and outer cylindrical metal fittings 10 and 12, the internal pressure fluctuation is induced based on the elastic deformation of the rubber elastic body 14
54 is formed.

On the other hand, the opening of the recess 28 provided in the integrally vulcanized molded product 18 is covered by the second orifice fitting 42, whereby the elasticity of the diaphragm 52 is provided inside the recess 28. The equilibrium chamber 56 is formed in which the volume change is allowed based on the deformation. A space that allows deformation of the diaphragm 52 is provided between the diaphragm 52 that defines the equilibrium chamber 56 and the outer tube fitting 12.
58 is formed, and the spaces 58, 58 are communicated with the external space through through holes 60 provided in the outer tubular fitting 12.

Further, a thin seal rubber layer 66 is integrally provided on the inner peripheral surface of the outer tubular metal fitting 12 over substantially the entire surface, and the outer tubular metal fitting 12 is fitted onto the metal sleeve 16. Thus, the seal rubber layer 66 is clamped between the fitting surfaces of the outer cylindrical metal fitting 12 and the metal sleeve 16, and the pressure receiving chamber 54 and the equilibrium chamber 56 are liquid-tightly sealed. Then, in the pressure receiving chamber 54 and the equilibrium chamber 56, respectively,
A predetermined incompressible fluid such as water, alkylene glycol, polyalkylene glycol, silicone oil, etc. is enclosed.

Furthermore, the outer fitting of the outer tubular metal fitting 12 to the metal sleeve 16 covers the outer peripheral surface side opening of the concave groove 46 of the first orifice metal fitting 40 and the notch 48 of the second orifice metal fitting 42, respectively. An orifice that allows the pressure receiving chamber 54 and the equilibrium chamber 56 to communicate with each other through the inside of the recessed groove 46 through the notch 48 and allows the fluid to flow between the chambers 54 and 56. The passage 62 is formed. In the present embodiment, since the orifice passage 62 is formed with a long flow path length extending in a spiral shape, a shake or bounce is generated on the basis of the resonance action of the fluid that is made to flow inside. It is tuned so that an excellent damping effect can be exerted on low-frequency vibrations equivalent to, etc.

Further, the pressure receiving chamber 54 is formed of a hard material having an outer peripheral surface shape substantially corresponding to the inner peripheral surface shape of the pressure receiving chamber 54 and slightly smaller than the inner peripheral surface of the pressure receiving chamber 54. The movable block 64 is placed so as to be freely movable. Then, by disposing the movable block 64, the inside of the pressure receiving chamber 54 is narrowed, and accordingly, based on the deformation of the rubber elastic body 14 and the displacement of the movable block 64 at the time of vibration input, around the movable block 64. The flow of fluid is created. In this embodiment, based on the resonance action of the fluid that causes the narrowed portion formed in the pressure receiving chamber 54 to flow, an excellent vibration isolation effect can be exerted against high frequency vibration such as engine vibration. As described above, the size of the narrowed portion formed in the pressure receiving chamber 54, in other words, the shape of the movable block 64 is tuned.

In the engine mount having such a structure, as described above, the inner tubular metal fitting 10 is attached to the vehicle body side, and the outer tubular metal fitting 12 is attached to the power unit side. In addition, under such a mounted state, as shown in FIG. 10, by the power unit weight (initial load) exerted between the inner and outer tubular metal fittings 10 and 12, the inner and outer tubular metal fittings 10 and 12, Twelve will be positioned substantially concentrically.

Further, under such a mounted state, when low-frequency vibration such as engine shake or bounce is input to the engine mount, the internal pressure fluctuation caused in the pressure receiving chamber 54 causes the pressure receiving chamber 54 and the equilibrium chamber 56 to be separated from each other. The flow of the fluid through the orifice passage 62 is generated between the two passages, so that a high damping effect can be exhibited based on the resonance action of the fluid that is made to flow inside the orifice passage 62. On the other hand, when high-frequency vibration such as engine secondary vibration is input to such an extent that the flow resistance of the fluid through the orifice passage 62 is significantly increased, it is formed around the movable block 64 in the pressure receiving chamber 54. The flow of the fluid is generated in the narrowed portion, and based on the resonance action of the fluid that is made to flow in the pressure receiving chamber 54, a low dynamic spring is achieved and an excellent vibration isolation effect is achieved. It's and thus capable of being exerted.

In addition, in such an engine mount, the inner and outer tubular metal fittings 10 and 12 are inserted in the space 20 under the condition that the inner and outer tubular metal fittings 10 and 12 are positioned substantially concentrically due to the weight of the engine unit being mounted. The stopper rubber 32 supported on the inner side of the inner space 38 of the void 20 on the outer cylinder metal fitting side.
, The stopper rubber is positioned so as to face the main vibration input direction at a predetermined distance.
Due to the contact of 32 with the inner peripheral surface 38 on the outer tubular metal fitting side, the relative displacement amount of the inner tubular metal fitting 10 to the outer tubular metal fitting 12 toward the space 20 (rebound direction) when an excessive vibration load is input, It can be effectively regulated.

Furthermore, there is a wrinkle-shaped unevenness on the outer peripheral surface of the stopper rubber 32, so that the friction coefficient between the contact surface of the stopper rubber 32 and the outer peripheral metal fitting side inner peripheral surface 38. Is significantly reduced, whereby the generation of abnormal noise (sliding contact noise) at the time of contact between the stopper rubber 32 and the inner peripheral surface of the outer cylinder metal fitting is extremely effectively alleviated or suppressed. It can be prevented.

In particular, in this embodiment, since a lubricant such as silicone oil is applied to the outer peripheral surface of the stopper rubber 32 having the wrinkle-like unevenness, the inner peripheral surface 38 on the outer cylinder metal fitting side. The reduction of the friction coefficient between the contact surfaces of
This can be achieved more effectively, and thereby a better effect of preventing abnormal noise can be exerted. The lubricant applied to the outer peripheral surface of the stopper rubber 32 is stored in the outer peripheral surface of the stopper rubber 32 by entering the concave portion of the wrinkle-like unevenness, thereby causing the abnormal noise. The reduction effect also has the advantage that it can be advantageously maintained over a long period of time.

In addition, in addition to this, in the present embodiment, since the entire outer peripheral surface of the stopper rubber 32 is provided with wrinkle-like unevenness, at the time of contacting the outer peripheral metal fitting side inner peripheral surface 38 of the stopper rubber 32, Even if a displacement is caused between the stopper rubber 32 and the inner peripheral metal member side inner peripheral surface 36, it is possible to advantageously prevent the generation of abnormal noise due to the displacement, thereby further improving the noise. The effect of preventing abnormal noise can be achieved.

Although one embodiment of the present invention has been described in detail above, this is a literal example, and the present invention should not be construed as being limited to such a specific example.

For example, in the above embodiment, one specific example of the present invention applied to a cylindrical mounting device containing a fluid is shown. The specific structure of such mounting device, that is, the specific shape of the orifice passage and the equilibrium chamber The specific structure of the above, or the presence or absence of the movable block in the pressure receiving chamber, etc. should be determined according to the anti-vibration characteristics required for the mount device, and are not limited to those of the present embodiment. It is by no means one.

Further, the present invention can be effectively applied to a so-called solid type cylindrical mounting device in which a fluid is not enclosed, in addition to the exemplified cylindrical mounting device containing a fluid.

Furthermore, the support structure of the stopper member to the inner tubular metal fitting side is also
The structure is not limited to that of the embodiment, and for example,
It is also possible to support both ends of the stopper member in the longitudinal direction by locking them to the inner tubular metal fitting side, or to support them by adhering the longitudinal ends of the stopper member to the inner tubular metal fitting side. is there.

Further, in the above-mentioned embodiment, the entire outer peripheral surface of the stopper member is provided with the wrinkle-like unevenness, but such a wrinkle is formed only on the contact surface side of the stopper member with respect to the inner peripheral surface of the outer cylinder fitting side. Even if the unevenness is provided, the effect of preventing the generation of abnormal noise can be achieved to some extent, and thereby the object of the present invention can be achieved.

Further, such wrinkle-shaped irregularities may be applied to the inner peripheral surface of the space where the stopper member abuts, in place of or instead of the outer peripheral surface of the stopper member.

Furthermore, the application of the lubricant to the outer peripheral surface of the stopper member provided with such a wrinkle-like unevenness and the inner peripheral surface of the void,
It is not always necessary, and the object of the present invention to reduce or prevent abnormal noise during displacement regulation can be effectively achieved even when no lubricant is applied.

In addition, in the above-described embodiment, one specific example of the present invention applied to an engine mount for an automobile is shown. However, the present invention may be applied to other vehicle differential mounts, body mounts, suspension bushes, etc. It goes without saying that any of the above can be advantageously applied to the cylindrical mount device in various devices other than automobiles.

Besides, although not listed one by one, the present invention can be implemented in a mode in which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art, and such an embodiment is Needless to say, all of them are included in the scope of the present invention without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a transverse sectional view showing a specific example of the present invention applied to an automobile engine mount, and FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a cross-sectional view showing an integrally vulcanized molded product constituting the engine mount shown in FIG. 1, and FIG.
FIG. 4 is a sectional view taken along the line IV-IV in the figure. Furthermore, FIG.
FIG. 5 is a longitudinal sectional view corresponding to FIG. 4, showing a state where a stopper rubber is attached to the integrally vulcanized molded product shown in FIG. 4. 6 is a cross-sectional view showing the first orifice fitting that constitutes the engine mount shown in FIG. 1, and FIG. 7 is a plan view of FIG. Furthermore, FIG. 8 is a cross-sectional view showing a second orifice fitting which constitutes the engine mount shown in FIG. 1, and FIG. 9 is a bottom view in FIG. Further, FIG. 10 shows a state in which the engine mount shown in FIG. 1 is mounted on a vehicle. It is a cross-sectional view corresponding to FIG. 10: Inner tube metal fittings, 12: Outer tube metal fittings 14: Rubber elastic body, 16: Metal sleeve 18: One piece vulcanization molded product, 20: Empty space 22: Pocket part, 24: Window part 32: Stopper rubber, 34: Mounting Part 36: Inner peripheral surface on the inner cylinder fitting side 38: Outer peripheral surface on the outer cylinder fitting side, 52: Diaphragm 54: Pressure receiving chamber, 56: Equilibrium chamber 62: Orifice passage

Claims (3)

[Scope of utility model registration request] 1. An inner tubular metal member and an outer tubular metal member, which are concentrically or eccentrically arranged at a predetermined distance in a radial direction from each other, are connected by a rubber elastic body interposed therebetween,
A tubular mounting device comprising a cavity that penetrates in the axial direction and extends over substantially a half circumference in the circumferential direction between the inner tubular metal member and the outer tubular metal member. By inserting and arranging a stopper member made of a rubber elastic body having a shape substantially corresponding to the peripheral surface shape, and supporting the inner cylindrical metal fitting side so as to be in contact with the inner peripheral metal surface side inner peripheral surface of the cavity, By contacting the inner peripheral surface of the stopper member with the outer cylinder fitting side of the space, the relative displacement amount of the inner cylinder fitting and the outer cylinder fitting in the radial direction is regulated. Of the contact surfaces with the inner peripheral surface of the void, at least one of the contact surfaces of the stopper member and the inner peripheral surface of the void with the outer cylinder fitting side is provided with wrinkle-like irregularities. A cylindrical mount device characterized in that 2. The tubular mold according to claim 1, wherein a lubricant is applied to the contact surfaces of the stopper member and the inner peripheral surface of the void having the wrinkle-like irregularities. Mount device. 3. A structure in which a metal sleeve is vulcanized and adhered to an outer peripheral surface of the rubber elastic body, and the metal sleeve is press-fitted into the outer tubular metal fitting so that the rubber elastic body is attached to the outer tubular metal fitting. A pocket portion that penetrates the metal sleeve and opens to the outer peripheral surface is provided at a portion between the inner tubular metal fitting and the outer tubular metal fitting, which is located on the side opposite to the space in the radial direction. By covering the opening of the above with the outer cylindrical metal fitting, a part of the wall portion is formed of the rubber elastic body, and internal pressure fluctuation is generated at the time of vibration input, and a predetermined incompressible fluid is sealed inside. Forming a pressure receiving chamber, the metal sleeve is recessed inward in the radial direction at a portion where the void is located between the inner tubular metal fitting and the outer tubular metal fitting, and a concave portion of the metal sleeve is formed. Inner surface of More, along with the stopper member constitutes an outer cylinder member side inner peripheral surface of said cavity to be brought into contact, between the outer cylindrical metal member and the recessed portion of the metal sleeve,
At least a part is formed of a flexible film, and a volume change is allowed to define an equilibrium chamber in which a predetermined incompressible fluid is enclosed, and further, the pressure receiving chamber and the equilibrium chamber are defined. The cylindrical mount device according to claim 1 or 2, further comprising: an orifice passage communicating with each other to allow a fluid to flow between the chambers.