JP3520641B2 - Cylindrical mounting device and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical mount device used for an automobile engine mount or the like, and more particularly to a cylindrical mount device having a bracket made of synthetic resin.

[0002]

2. Description of the Related Art Conventionally, as a kind of mount device that is interposed between members that constitute a vibration transmission system and that connects both members in a vibration-proof manner, it is mounted on a bracket that is attached to one member that is vibration-proof connected. A hole is provided, and a shaft member attached to the other member for vibration-proof connection is inserted and arranged in the mount mounting hole, and the shaft member and the bracket are elastically connected via a rubber elastic body. A cylindrical mount device having a structure is known, and is used for an automobile engine mount, a differential mount, a suspension bush, and the like.

Further, in recent years, for the purpose of weight reduction and cost reduction, it has been considered to employ a bracket made of a synthetic resin as described in Japanese Utility Model Publication No. 6-76731. However, if the outer peripheral surface of the main body rubber elastic body is directly fixed to the inner peripheral surface of the mount mounting hole in the bracket made of synthetic resin, when the load is input between the shaft member and the bracket, the main body rubber elastic body and the bracket are Since a localized concentrated load is likely to act between them, there is a problem that an attempt to secure sufficient bracket strength inevitably leads to an increase in the size of the bracket. Moreover, when a large deformation is caused in the main body rubber elastic body, a gap or the like may occur between the mounting surfaces of the main body rubber elastic body and the bracket, so that sufficient fixing strength between the main body rubber elastic body and the bracket should be obtained. There was also the problem that it was difficult.

In order to deal with such a problem,
Vulcanize and adhere a metal plate to the outer peripheral surface of the main rubber elastic body,
It is possible to fix the main rubber elastic body to the mount mounting hole of the bracket made of synthetic resin via the metal plate, but with such a structure, the adhesive strength between the metal and the synthetic resin can be stably obtained. In addition to being difficult, the adhesive surface between the metal plate and the bracket may be separated due to the difference in thermal expansion between the metal and the synthetic resin, which may cause backlash and the like, which may reduce the durability. Not a policy.

[0005]

The present invention has been made in view of the circumstances as described above, and the problem to be solved by the present invention is to increase the withstand load strength of a bracket without increasing the size of a member. (EN) It is an object of the present invention to provide a cylindrical mounting device having a synthetic resin bracket that can be advantageously secured.

Further, the present invention also provides a cylindrical mount device equipped with a synthetic resin bracket, which can secure the fixing strength between the main rubber elastic body and the bracket advantageously and with excellent durability. To aim.

[0007]

In order to solve such a problem, a feature of the present invention resides in that a shaft member is internally inserted into a mount mounting hole provided in a bracket made of synthetic resin, and the shaft member and the bracket are provided in a main body. In a cylindrical mount device elastically connected via a rubber elastic body, a reinforcing metal fitting is fixed to the outer peripheral surface of the main rubber elastic body, and a mounting rubber layer is adhered to the outer peripheral surface of the reinforcing metal fitting. The outer peripheral surface of the mounting rubber layer is adhered to the inner peripheral surface of the mount mounting hole of the bracket.

In such a cylindrical mount device having the structure according to the present invention, the reinforcing metal fittings provided on the outer peripheral surface of the main rubber elastic body disperse the local stress generated in the main rubber elastic body. As a result, the concentrated acting load on the bracket is reduced or prevented, and the load resistance strength of the bracket is advantageously secured.

Further, in such a tubular mount device, the reinforcing metal member fixed to the outer peripheral surface of the main rubber elastic body is
Since it is adhered to the bracket via the mounting rubber layer, the reinforcing metal fitting can be firmly fixed to the bracket as compared with the case where the reinforcing metal fitting is directly adhered to the synthetic resin bracket. Thus, the main body rubber elastic body can be attached to the bracket with high fixing strength and excellent durability.

That is, by interposing a mounting rubber layer between the reinforcing metal member and the synthetic resin bracket, the fixing strength of the reinforcing metal member and the synthetic resin bracket is determined, and the bonding strength of the reinforcing metal member and the mounting rubber layer and the mounting rubber layer are combined. By obtaining the adhesive strength of the resin bracket, it is difficult to obtain sufficient adhesive strength.
The reinforcing metal fitting can be easily and firmly fixed to the synthetic resin bracket.

Moreover, the force acting between the reinforcing metal member and the synthetic resin bracket due to the difference in thermal expansion between the two members is also absorbed by the mounting rubber layer interposed between the two members to the adhesive surface. Since the adverse effect of is reduced and the occurrence of backlash is prevented, even more excellent durability is exhibited in the fixing portion of the reinforcing metal member and the bracket.

In the present invention, the fixing structure of the reinforcing metal fitting to the outer peripheral surface of the main rubber elastic body is not particularly limited, and the reinforcing metal fitting is adhered using an appropriate adhesive after the main rubber elastic body is vulcanized and molded. It is also possible to fit or fix the reinforcing metal fitting by caulking or the like to an appropriate mounting member adhered to the outer peripheral surface of the main body rubber elastic body, but preferably the reinforcing metal fitting is the main rubber elastic body. It is vulcanized and adhered to the outer peripheral surface of the reinforcing member, whereby the reinforcing metal fitting can be easily and firmly fixed to the main rubber elastic body.

The bracket used in the present invention may have at least a mount mounting hole,
The specific shape and structure are not limited in any way. For example, one having a cylindrical outer peripheral surface fitted to a predetermined mount mounting member, one having a leg portion provided with a bolt insertion hole for mounting the mount mounting member, or the like can be adopted.

The thickness of the mounting rubber layer used in the present invention is not particularly limited, but is preferably set to about 0.8 mm to 2.5 mm. That is, especially by adopting such a thickness of the mounting rubber layer,
It is possible to form the mounting rubber layer that can effectively exhibit the above-described effects with good moldability, without having a great influence on the mount spring characteristics by the main rubber elastic body.

Further, according to the present invention, as described in claim 2, it is possible to integrally form a flange portion for covering the opening end face of the mount mounting hole in the bracket on both axial sides of the reinforcing metal member. As a result, the member strength of the bracket is improved, and damage to the bracket due to contact of other members with the axial end surface of the bracket or the like is effectively prevented.

The mounting rubber layer may be formed of an appropriate material separately from the main body rubber elastic body and adhered to the reinforcing metal member. However, it can be easily formed by integrally forming with the main body rubber elastic body. In particular, as described in claim 3, the main body rubber elastic body and the mounting rubber layer are integrally formed and vulcanized and adhered to the reinforcing metal member to reinforce the main body rubber elastic body and the mounting rubber layer. It can be easily and firmly fixed to the metal fittings.

Further, in the present invention, the reinforcing metal fitting is arranged over substantially the entire fixing surface of the main rubber elastic body to the bracket so that it is not necessary to directly bond the main rubber elastic body to the bracket. It suffices that it is provided, and it is not always necessary to dispose it so as to cover the entire outer peripheral surface of the main rubber elastic body.

For example, as described in claim 4, a space is provided between the shaft member and the mount mounting hole of the bracket so as to extend substantially circumferentially in the circumferential direction and penetrate in the axial direction. When the main body rubber elastic body is fixed to the bracket on the outer peripheral surface of the main body rubber elastic body on the side opposite to the space forming portion on the side opposite to the space forming portion, the cavity forming part is excluded. It is desirable that a reinforcing metal member be fixed to the outer peripheral surface extending over a substantially half circumference on the side opposite to the forming portion. In the cylindrical mount device having such a structure, the formation of the void can reduce or prevent the occurrence of tensile stress in the main rubber elastic body, and
Since it is not necessary to use the tubular reinforcing metal fitting, there is an advantage that the reinforcing metal fitting can be easily formed by press molding or the like.

Further, according to the present invention, as described in claim 5, a pocket portion opening to the outer peripheral surface of the main rubber elastic body is provided, and a cylindrical reinforcing metal fitting is attached to the main rubber elastic body. By inserting and covering the pocket portion, it is also possible to form a fluid chamber in which an incompressible fluid is enclosed, thereby providing a vibration damping effect based on the flow action of the fluid enclosed in the inside. It becomes possible to use. In order to sufficiently secure the sealing performance of the pocket opening by the reinforcing metal fitting, a seal sleeve is fixed to the outer peripheral surface of the main rubber elastic body, and the reinforcing metal fitting is externally fitted and fixed to the seal sleeve. It is effective to adopt a structure or the like in which a sealing property is obtained between the fitting surfaces of the reinforcing metal fittings.

Further, according to the present invention, the shaft members are inserted and arranged in the mount mounting holes provided in the bracket made of synthetic resin, and the shaft members and the bracket are elastically connected through the rubber elastic body. A method of manufacturing a cylindrical mount device, comprising: (a) a reinforcing metal fitting is fixed to an outer peripheral surface of the main rubber elastic body to which the shaft member is attached,
A step of preparing a mount body in which a mounting rubber layer is adhered to the outer peripheral surface of the reinforcing metal fitting, and (b) a step of applying an adhesive to the outer peripheral surface of the mounting rubber layer in the mount body to form an adhesive layer (C) The mount body is set in a molding die, and the molding die is filled with a resin material to form the bracket, and the mounting rubber layer of the mount body is attached to the mount mounting hole of the bracket. On the other hand, the method of manufacturing a cylindrical mount device, which comprises a step of adhering the adhesive layer via the adhesive layer, is also featured.

An adhesive for forming an adhesive layer on the outer peripheral surface of the mounting rubber layer is, for example, Japanese Patent Publication No. 7-55510.
Chlorosulfonated polyethylene-based adhesives such as those disclosed in Japanese Laid-Open Patent Publications are preferably used, and more preferably, they are set in a bracket mold while the mount body is heated to activate the adhesive layer. By filling the molding cavity with the heat-melted resin material, the attachment rubber layer and the bracket can be advantageously bonded.

According to such a method of the present invention, since the mounting rubber layer can be adhered to the bracket at the same time when the bracket is molded, the mount main body can be assembled to the bracket. Therefore, according to the present invention as set forth in claim 1, Such a tubular mount device can be easily manufactured,
It is also possible to apply a compressive force to the mounting rubber layer by the resin filling pressure at the time of molding the bracket, or deform the reinforcing metal fitting to pre-compress the rubber elastic body.

The method of manufacturing the cylindrical mount device according to the present invention is not limited to such a method.
For example, after separately forming the mount body and the bracket, applying an adhesive to at least one of the mounting rubber layer of the mount body and the mount mounting hole of the bracket, and then pressing the mount body into the mount mounting hole of the bracket to assemble Is also possible.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings in order to more specifically clarify the present invention.

First, FIGS. 1 and 2 show an automobile engine mount 10 as a first embodiment of the present invention. This engine mount 10 has a bracket 12
The inner cylindrical metal fitting 16 as a shaft member is inserted and arranged in the mount mounting hole 14 and the inner cylindrical metal fitting 16 and the bracket 12 are elastically connected by a main rubber elastic body 18. . In the engine mount 10, the inner cylinder fitting 16 and the bracket 12 are
By attaching the power unit to either one of the power unit and the vehicle body, the power unit can be vibration-isolatedly supported with respect to the vehicle body. It should be noted that in such a mounted state, a load is applied to the main rubber elastic body 18 by the power unit.

More specifically, the bracket 12 is made of a fiber-reinforced synthetic resin material such as polyamide resin, and has a substantially thick plate-like substrate portion 20 and the substrate portion 20.
It has a substantially semi-cylindrical or tunnel-like cylindrical body portion 22 that is integrally formed so as to project on one surface. The mount mounting hole 14 is formed by the inner hole of the tubular portion 22.

Further, both sides in the width direction of the base plate portion 20 are projected outward from the tubular body portion 22 by a predetermined length, and a plurality of fixing metal fittings 28 are embedded in each of these protruding portions 26. Then, with a bolt or the like inserted through each fixing metal fitting 28,
The bracket 12 is attached to the power unit side (not shown) or the vehicle body side.

Further, an inner cylinder metal fitting 16 is inserted through the mount mounting hole 14 of the bracket 12.
The inner tubular metal member 16 has a small-diameter cylindrical shape whose axial length is slightly longer than that of the tubular body portion 22 of the bracket 12, and is located in the hollow portion of the mount mounting hole 14, and the tubular body portion 22. Are arranged substantially parallel to the axial direction of.

A main rubber elastic body 18 is interposed between the inner tubular metal member 16 and the tubular body portion 22 of the bracket 12 and accommodated in the mount mounting hole 14. The main rubber elastic body 18 has an outer peripheral surface shape substantially corresponding to the inner peripheral surface shape of the bracket mounting hole 14, and the inner tubular metal member 16 and the bracket 1 are provided on the base plate portion 20 side of the bracket 12.
A cavity 29 is provided that extends between the two in the circumferential direction for approximately half a circumference and penetrates in the axial direction.

Further, in the rubber elastic body 18, a space 29
A thin metal plate 30 serving as a reinforcing metal member is vulcanized and adhered to a semicircular outer peripheral surface extending over a substantially half circumference on the side opposite to the formation portion of. The metal plate 30 is formed by bending a thin plate material by pressing or the like, and has a groove shape of a substantially semicircular cross section that opens downward as a whole,
The bracket 12 has a semicircular cross section with an outer diameter dimension slightly smaller than the inner diameter of the semicircular portion of the tubular portion 22.

Furthermore, a thin mounting rubber layer 32 is formed on the outer peripheral surface of the metal plate 30 so as to cover substantially the entire surface thereof. Particularly, in this embodiment, the mounting rubber layer 32
Is integrally formed with the main body rubber elastic body 18, and the mounting rubber layer 32 and the main body rubber elastic body 18 are vulcanized and adhered to the inner and outer peripheral surfaces of the metal plate 30. It should be noted that the metal plate 30 is provided with a plurality of communication holes 34 penetrating the front and back sides, and the main rubber elastic body 18 and the mounting rubber layer 32 are integrally connected through the communication holes 34.

The outer peripheral surface of the mounting rubber layer 32 is
The main body rubber elastic body 18 is attached to the bracket 12 on the outer peripheral surface side by being bonded to the inner peripheral surface of the mount mounting hole 14 of the bracket 12, whereby the inner tubular metal fitting is provided. 16 is elastically connected to the bracket 12 via a main rubber elastic body 18.

In this embodiment, the direction in which the inner tubular metal member 16 is separated from the base plate portion 20 side of the bracket 12 (in FIG. 1,
The load by the power unit is applied between the inner tubular metal member 16 and the bracket 12 so that the tensile stress is generated in the main rubber elastic body 18 by the space 29. Is reduced or prevented. Further, the main rubber elastic body 18 is provided with a slit 38 penetrating in the axial direction in a portion facing the space 29 in the radial direction with the inner tubular metal fitting 16 sandwiched therebetween. The characteristics are adjusted.

Further, in this embodiment, flange-shaped portions 36 that spread radially outward are integrally formed on both axial sides of the metal plate 30. Then, these flange-shaped portions 36, 36 form the tubular body portion 2 of the bracket 12.
It is superposed on the axial end surface of 2 through a thin mounting rubber layer 32, thereby forming a protective cover for covering the axial end surface of the tubular portion 22.

Here, the attachment rubber layer 32 is adhered to the bracket 12 by, for example, the main rubber elastic body 18 having the inner tubular metal member 16 and the metal plate 30 and the attachment rubber layer 3.
After making the mount body, which is an integrally vulcanized molded product of 2,
An adhesive layer is formed by applying an appropriate adhesive to the outer peripheral surface of the mounting rubber layer 32, and then the mount body is set in the mold of the bracket 12 and formed on the outer peripheral side of the adhesive layer. By molding the bracket 12 by filling the molding cavity with the synthetic resin material which is heated and melted, it can be advantageously performed simultaneously with the formation of the bracket 12. A vulcanized adhesive containing chlorosulfonated polyethylene as a main component is preferably used as the adhesive, and after the adhesive layer is formed on the outer peripheral surface of the mounting rubber layer 32, the mount body is heated in an oven or the like. Then, the mounting rubber layer 32 and the bracket 12 are formed by molding the bracket 12 on the outer peripheral side of the vulcanizing adhesive layer under the condition that the vulcanizing adhesive is activated.
And can be more firmly bonded.

In the engine mount 10 having the above-described structure, the bracket 12 of the main rubber elastic body 18 is used.
The metal plate 30 is provided over substantially the entire mounting surface for the metal, and when a load is applied between the inner tubular metal member 16 and the bracket 12, the stress caused in the main rubber elastic body 18 is the metal. Since the plates 30 are distributed over a wide range and transmitted to the bracket 12, a local load action on the bracket 12 is prevented and the input load strength of the engine mount 10 is advantageously ensured.

In the engine mount 10, the metal plate 30 has the mounting rubber layer 32,
Since the metal plate 30 is bonded to the bracket 12 made of synthetic resin, a large bonding strength can be easily and stably obtained as compared with the case where the metal plate 30 is directly bonded to the bracket 12. In addition, since the mounting rubber layer 32 absorbs the generation of a gap due to the difference in thermal expansion between the metal plate 30 and the bracket 12, etc., the metal plate 3
It is possible to more effectively prevent the peeling of adhesion, the occurrence of backlash, etc. between 0 and the bracket 12, and to exhibit excellent durability.

Furthermore, the engine mount 1 of the present embodiment.
In 0, since the axial end surface of the tubular body portion 22 of the bracket 12 is protected by the flange-shaped portion 36 integrally formed with the metal plate 30, the power unit side is displaced in the mount axial direction, and the tubular body portion 22. Has an advantage that the bracket 12 is prevented from being damaged even when the bracket 12 is brought into contact with the axial end face of the bracket 12. Thus, such prevention of the damage to the bracket 12 is effectively achieved without increasing the number of special parts. It can be done.

It should be noted that such a protective cover structure for the tubular portion 22 by the flange-like portion 36 does not necessarily have to be adopted, and in the present invention, as shown in FIG. It is also possible to employ the metal plate 30 which does not have. In FIG. 3, members and parts corresponding to those in the first embodiment are designated by the same reference numerals as those in the first embodiment in order to facilitate understanding.

Next, FIGS. 4 and 5 show an engine mount 40 as a second embodiment of the present invention.
In this engine mount 40, a cylindrical mount body 46 in which an incompressible fluid is enclosed is assembled in a mount mounting hole 44 of a bracket 42 made of synthetic resin. The tubular metal fitting 48 and the bracket 42 are attached to either one of the power unit and the vehicle body, so that the power unit can be supported in a vibration-proof manner with respect to the vehicle body.

Here, the bracket 42 has a substrate portion 50 having a substantially thick plate shape, and a cylindrical body portion 52 having a substantially cylindrical shape which is integrally formed so as to project on one surface of the substrate portion 50. There is. The mount mounting hole 44 is formed by the inner hole of the cylindrical portion 52 having a circular cross section. Also,
Both sides in the width direction of the base plate portion 50 project outward from the tubular body portion 52 by a predetermined length, and reinforcing ribs 58 are provided so as to extend between the respective overhanging portions 56 and the tubular body portion 52. At the same time, a plurality of fixing metal fittings 60 are embedded in each overhanging portion 56, and by the bolts or the like inserted into the respective fixing metal fittings 60,
The bracket 42 is attached to the power unit side (not shown) or the vehicle body side.

On the other hand, in the tubular mount body 46, the inner tubular metal fitting 48 and the outer tubular metal fitting 62 as a reinforcing metal fitting are arranged at a predetermined distance in the radial direction from each other and slightly eccentric to each other. The inner tubular metal fitting 48 and the outer tubular metal fitting 62 are connected by a main rubber elastic body 64 interposed between them, and the outer tubular metal fitting 62 is attached to the mount mounting hole 44 of the bracket 42, whereby the bracket 4
It is assembled in 2. In addition, when mounting on the vehicle,
The main rubber elastic body 64 is elastically deformed by the load input of the power unit, so that the inner tubular fitting 48 and the outer tubular fitting 62 are
Will be positioned substantially coaxially.

More specifically, the inner cylindrical metal member 48 has a small diameter cylindrical shape, and the stopper metal member 6 is provided at the central portion in the axial direction.
3 protrudes outward in the radial direction and is fixed. Further, a seal sleeve 66 is arranged radially outward of the inner tubular member 48 with a predetermined distance therebetween and slightly eccentric.
The seal sleeve 66 has a thin, generally cylindrical shape, and a first window portion 68 and a second window portion 70 are provided on both radial direction opposite portions of the inner sleeve member 48 in the eccentric direction. In addition, a stopper portion 72, which projects inward in the radial direction and extends across both side edges in the axial direction of the second window portion 70, is integrally formed at the central portion in the circumferential direction of the second window portion 70. Is formed in. In addition, the first window portion 68 and the second window portion 70
A groove 74 extending in the circumferential direction is provided between the end edges on both sides in the circumferential direction.

A main body rubber elastic body 64 having a substantially thick cylindrical shape as a whole is interposed between the inner cylindrical metal fitting 48 and the seal sleeve 66, and the inner cylindrical metal fitting 48 and the seal sleeve 66 are connected to each other. The rubber elastic body 64 is vulcanized and adhered to the inner and outer peripheral surfaces thereof. Further, the main body rubber elastic body 64 has a first pocket portion 76 opening to the outer peripheral surface through the first window portion 68 and a second outer peripheral portion through the second window portion 70 on both sides in the radial direction sandwiching the inner tubular metal fitting 16. A second pocket 78 that is open to the surface is provided. Further, the bottom wall portion of the second pocket portion 78 is thinned by a slit 80 formed in the main rubber elastic body 64 to form a flexible film 82 that is easily deformable. In addition, the stopper metal fitting 63 is located at the center of the bottom portion of the first pocket portion 76 and is covered with the cushioning rubber 84, whereas the center of the bottom portion of the second pocket portion 78 is the outer periphery of the stopper portion 72. A stopper rubber 86 is formed to project on the surface.

Further, the inner tubular member 48 and the seal sleeve 6
The outer tubular metal fitting 62 is externally inserted into the integrally vulcanized molded product of the main rubber elastic body 64 having 6 or the like, and is fitted and fixed to the seal sleeve 66 by press fitting, drawing, or the like. The outer tube fitting 62 has a mount mounting hole 44 of the bracket 42.
Has a thin-walled cylindrical shape having an outer diameter dimension slightly smaller than the inner diameter of the inner peripheral surface of the inner peripheral surface of the inner peripheral surface of the inner peripheral surface of the inner peripheral surface of the outer peripheral surface of the outer peripheral surface. The entire surface is covered with a thin mounting rubber layer 90. That is, the seal rubber layer 88 and the mounting rubber layer 90 are integrally vulcanized and adhered to the inner and outer peripheral surfaces of the outer tubular fitting 62.

Then, the outer cylinder metal fitting 62 is replaced by the seal sleeve 6.
6, and the seal rubber layer 88 is sandwiched between them, so that the first pocket portion 76 and the second pocket portion 78 are fluid-tightly covered, and water and alkylene glycol are respectively placed inside. A pressure receiving chamber 92 and a balance chamber 94 in which a predetermined incompressible fluid such as
The recessed grooves 74, 74 are covered to form orifice passages 96, 96 that connect the pressure receiving chamber 92 and the equilibrium chamber 94 to each other.

That is, in the tubular mount body 46 having such a structure, the inner tubular fitting 48 and the outer tubular fitting 6 are
When a vibration in the radial direction in which the pressure receiving chamber 92 and the equilibrium chamber 94 are opposed to each other is input between the two, the pressure receiving chamber 92 in which a part of the wall portion is constituted by the main rubber elastic body 64 to cause an internal pressure fluctuation When,
A relative internal pressure fluctuation is generated between the equilibrium chambers 94 in which a part of the wall portion is configured by the flexible film 82 and the volume change is allowed, and the fluid flow through the orifice passages 96, 96 is caused. As a result, a predetermined vibration damping effect is exhibited based on the flow action such as the resonance action of the fluid. Further, when an excessive vibration load is input, the stopper fitting 63 and the stopper rubber 86 come into contact with the outer tubular fitting 62, whereby the relative displacement amount of the inner tubular fitting 48 and the outer tubular fitting 62 or the main rubber elastic body 64. The amount of deformation will be limited.

Then, such a cylindrical mount body 4
6 is, for example, the mounting rubber layer 9 as in the first embodiment.
After forming an adhesive layer by applying an appropriate adhesive to the outer peripheral surface of No. 0, the adhesive layer is set in the molding die of the bracket 42, and is heated and melted in the molding cavity formed on the outer peripheral side of the adhesive layer. Bracket 4 filled with resin material
By molding 2, the outer peripheral surface of the tubular mount body 46 is adhered to the tubular body portion 52 of the bracket 42 and fixedly assembled in the mount mounting hole 44 of the bracket 42. The engine mount 40 is the target. In addition, annular projections 98 that project inward in the radial direction are integrally formed at the peripheral edges of the openings on both sides in the axial direction of the tubular body portion 52. These annular projections 98,
98 is brought into contact with the outer cylindrical metal fitting 62 of the cylindrical mount body 46 and the axial end surfaces of the seal sleeve 66, whereby the axial holding force of the bracket 42 with respect to the cylindrical mount body 46 is secured.

That is, also in the engine mount 40 of this embodiment having such a structure, the same effects as those of the engine mount of the first embodiment can be effectively exhibited, and in particular, First and second pockets 7
By using the outer tubular metal fitting 62 for closing the valves 6, 78 as the reinforcing metal fitting, there is an advantage that a special member is not required as the reinforcing metal fitting, the structure is simple, and the manufacturing is easy.

Further, in this embodiment, since the reinforcing metal member is constituted by the cylindrical outer cylindrical metal member 62, the molding cavity formed on the outer side of the outer cylindrical metal member 62 is filled with the resin material to form the bracket 42. At the time of forming, the filling pressure of the resin material is exerted on the outer tubular metal fitting 62 to press the outer tubular metal fitting 62 against the seal sleeve 66, and further, the main body rubber elastic body 6
It is also possible to add precompression to 4.

The embodiments of the present invention have been described in detail above, but these are literal examples and the present invention should not be construed as being limited to such specific examples.

For example, when the fixing surface to the bracket on the outer peripheral surface of the main rubber elastic body is divided into a plurality of portions in the circumferential direction, it is divided into a plurality of portions so as to be located on the respective fixing surfaces. The reinforcing metal member may be fixed to the rubber elastic body.

The shape of the mount mounting hole of the bracket is determined according to the shape of the outer peripheral surface of the main rubber elastic body in consideration of the mount disposing space, the input load, etc. In addition to the shape and the cylindrical shape, various shapes such as a rectangular tubular shape can be appropriately adopted.

In addition, in the above-mentioned embodiment, a specific example of the present invention applied to an engine mount for an automobile is shown. Needless to say, it can be applied to various types of cylindrical mounting devices.

Although not listed one by one, the present invention
Based on the knowledge of those skilled in the art, it can be implemented in various modified, modified, and improved modes, and
It goes without saying that all such embodiments are included in the scope of the present invention without departing from the spirit of the present invention.

[0056]

As is apparent from the above description, in the tubular mounting device having the structure according to the present invention, the stress induced in the main rubber elastic body is dispersed in a wide range by the reinforcing metal member and transmitted to the bracket. Therefore, since the local load action on the bracket is prevented, the input load strength of the bracket and the cylindrical mount device can be advantageously secured without increasing the size of the bracket.

Moreover, since the reinforcing metal member fixed to the outer peripheral surface of the main rubber elastic body is bonded to the bracket through the mounting rubber layer, the reinforcing metal member is bonded and elastically deformed by the mounting rubber layer. Can be firmly fixed to the bracket, and play or the like can be prevented at the fixing portion between the reinforcing metal member and the bracket, so that excellent durability can be exhibited.

Further, according to the method of the present invention, the mount main body can be assembled and fixed to the bracket at the same time when the bracket is formed. Therefore, the tubular mount device having the structure according to the present invention can be easily manufactured. Is possible.

[Brief description of drawings]

FIG. 1 is a transverse sectional view showing an engine mount as a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the engine mount shown in FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the engine mount shown in FIG.

FIG. 4 is a transverse cross-sectional view showing an engine mount as a second embodiment of the present invention.

5 is a vertical cross-sectional view of the engine mount shown in FIG.

[Explanation of symbols]

10,40 engine mount 12,42 bracket 14,44 mount mounting holes 16,48 Inner tube fitting 18,64 Main rubber elastic body 30 metal plates 32 Mounting rubber layer 46 Cylindrical mount body 62 Outer cylinder fittings 90 Mounting rubber layer

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-210134 (JP, A) JP-A-3-140641 (JP, A) Fukui 6-76731 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F16F 1/38 F16F 15/08

Claims (6)

(57) [Claims] 1. A tubular mount device in which shaft members are inserted and arranged in mount mounting holes provided in a bracket made of synthetic resin, and the shaft members and the bracket are elastically connected via a rubber elastic body. In the above, the reinforcing metal fitting is fixed to the outer peripheral surface of the main rubber elastic body, and the mounting rubber layer is adhered to the outer peripheral surface of the reinforcing metal fitting so that the outer peripheral surface of the mounting rubber layer is the inner peripheral surface of the mount mounting hole of the bracket. A cylindrical mount device characterized by being bonded to a surface. 2. The tubular mount device according to claim 1, wherein flange portions are integrally formed on both sides of the reinforcing metal fitting in the axial direction so as to cover an opening end surface of a mount mounting hole in the bracket. 3. The reinforcing metal fitting is vulcanized and bonded to the outer peripheral surface of the main rubber elastic body, and the mounting rubber layer is integrally formed with the main rubber elastic body and vulcanized and bonded to the reinforcing metal fitting. The cylindrical mount device according to claim 1 or 2. 4. A cavity is provided between the shaft member and the mount mounting hole of the bracket, the cavity extending substantially circumferentially and penetrating in the axial direction. 4. The reinforcing metal fitting is fixed to an outer peripheral surface extending over a substantially half circumference on the side opposite to the space forming portion.
The cylindrical mount device according to any one of 1. 5. A main body rubber elastic body is provided with a pocket opening to the outer peripheral surface thereof, and the main body rubber elastic body is externally fitted with the tubular reinforcing metal fitting so as to cover the pocket portion. The cylindrical mount device according to claim 1, wherein a fluid chamber in which a compressive fluid is enclosed is formed. 6. A tubular mount device in which shaft members are inserted and arranged in mount mounting holes formed in a bracket made of synthetic resin, and the shaft members and the bracket are elastically connected via a rubber elastic body. And a step of preparing a mount body in which a reinforcing metal member is fixed to the outer peripheral surface of the main body rubber elastic body to which the shaft member is fixed, and a mounting rubber layer is adhered to the outer peripheral surface of the reinforcing metal member. A step of applying an adhesive to the outer peripheral surface of the mounting rubber layer in the mount body to form an adhesive layer; and setting the mount body in a molding die and filling the molding die with a resin material, Forming the bracket, and bonding the mounting rubber layer of the mount body to the mount mounting hole of the bracket via the adhesive layer. Manufacturing method of cylindrical mounting device.