JPH09170634A - Cylindrical mount device and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the input load resisting strength of a bracket and its productivity, in a cylindrical mount device in which a shaft member is installed elastically through a main body rubber elastic body for the mount mounting hole of a synthetic resin made bracket. SOLUTION: In a mount mounting hole 14, a penetrated space 29 penetrated in the axial direction is installed on one side positioned while holding a shaft member 16 in a right angle direction for the shaft, while a metal plate 30 opened heading for the penetrated space 29 side is bonded for the outer periphery surface of a main body rubber elastic body 18 in the other side and the outer periphery surface of time main body rubber elastic body 18 is stuck, on the inner periphery surface of the mount mounting hole 14 of the bracket 12 through the metal plate 30.

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 rubber elastic body, a gap or the like may occur between the mounting surfaces of the main rubber elastic body and the bracket, and the fixing strength between the main rubber elastic body and the bracket is sufficient and good. There is also a problem that it is difficult to obtain with durability.

[0004]

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 mount device provided with a synthetic resin bracket that can be advantageously secured.

[0005]

In order to solve such a problem, a feature of the present invention resides in that a shaft member is inserted into a mount mounting hole provided in a bracket made of a synthetic resin, and the shaft member is mounted. In a cylindrical mount device in which a bracket and a bracket are elastically coupled via a rubber elastic body, a shaft is provided between the shaft member and the bracket on one side sandwiching the shaft member in a direction perpendicular to the shaft. A through-hole is formed so as to penetrate in the direction to expose the surface of the main rubber elastic body to the through-hole, while the main rubber elastic body is located on the other side of the shaft member sandwiching the shaft member in the direction perpendicular to the axis. A metal plate that bends or curves and opens toward the through space side is adhered to the outer peripheral surface, and the outer peripheral surface of the main rubber elastic body is attached to the bracket mounting device through the metal plate. In that the allowed fixed to the inner circumferential surface of the hole.

In the cylindrical mount device having the structure according to the present invention, the metal plate disposed on the outer peripheral surface of the main rubber elastic body disperses 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, since the metal plate is firmly adhered to the outer peripheral surface of the main rubber elastic body fixed to the bracket by vulcanization adhesion or the like, even if the rubber elastic body is elastically deformed, A gap or the like is prevented from being generated between the outer peripheral surface of the bracket and the bracket, and the adhesive strength of the rubber elastic body to the bracket is exhibited advantageously and with excellent durability. The method of fixing the metal plate to the bracket is not particularly limited, and adhesion using an appropriate adhesive, fixation by a mechanical engagement structure, or the like is appropriately adopted.

Further, since the metal plate has a non-cylindrical shape with an opening, it is extremely easy to manufacture as compared with the case of using a metal fitting, and the manufacturing cost can be greatly suppressed.
In particular, since the metal plate has a non-cylindrical shape, it is possible to form the metal plate by press molding. As described in claim 2, if the metal plate of the press molded product is adopted, The manufacturability and cost effectiveness of the metal plate, and by extension, the cylindrical mount device can be further improved.

Furthermore, in the present invention, as described in claim 3, a protective cover portion which is superposed on the axial end surface of the peripheral wall portion of the mount mounting hole in the bracket and covers the axial end surface is provided. It is also possible to form it integrally with the mounting bracket, which improves the strength of the bracket member and effectively prevents damage to the bracket due to contact of other members with the axial end surface of the bracket. To be prevented.

Further, according to the present invention, as described in claim 4, a mounting metal fitting for mounting the bracket to one of the members to be vibration-proof coupled is fixed to the bracket and the mounting metal fitting is attached to the mounting metal fitting. On the other hand, it is also possible to connect and fix a metal plate. As a result, the load that is input to the bracket through the metal plate is transmitted from the metal plate to the member that is vibration-isolated and connected through the mounting bracket, so that the acting load on the bracket is substantially reduced and the bracket The input load strength can be more effectively ensured.

Further, the specific structure of the bracket, the metal plate, the main rubber elastic body, etc. adopted in the present invention is not particularly limited, but, for example, as described in claim 5, the bracket is A substantially plate-shaped substrate portion,
It has a substantially semi-cylindrical cylindrical body portion that protrudes on one surface of the substrate portion and forms a mount mounting hole between the substrate portion and the substrate portion, and the substrate portion is perpendicular to the outer peripheral surface of the cylindrical portion. A pair of mounting portions are formed so as to project to both sides in the direction, and mounting brackets for mounting the bracket to one of the vibration-proof coupled members are fixed to these mounting portions, while in the mount mounting hole. The through hole is provided between the shaft member and the substrate portion, the main body rubber elastic body is disposed substantially between the shaft member and the cylindrical body portion, and the main body A tube in which a metal plate adhered to the outer peripheral surface of the rubber elastic body is bent outward on both sides at the opening on the side of the base plate, extends into each mounting portion of the bracket, and is connected and fixed to each of the mounting brackets. The structure of the mold mounting device is preferably adopted. That.

In the cylindrical mount device having such a structure, the main vibration load inputted between the shaft member and the bracket is set so as to be inputted in the direction in which the shaft member is displaced toward the cylinder body side of the bracket. By doing so, it is possible to suppress the occurrence of tensile stress in the main rubber elastic body and improve the durability. Further, the load applied from the main rubber elastic body to the bracket is dispersed by the metal plate over a wide range of the tubular body portion, and the load is directly transmitted from the metal plate to the mounting bracket, so that the tubular body portion is Since the load acting on is reduced, extremely excellent load bearing strength is exhibited.

Furthermore, the present invention is a method of manufacturing a cylindrical mount device having a structure according to the present invention, wherein (a) a mount body in which a shaft member and a metal plate are bonded to a rubber elastic body is prepared. And (b) the mount body is set in the mold of the bracket, and the molding cavity of the mold is filled with a resin material to form the bracket on the outer peripheral surface of the metal plate in the mount body, A method of manufacturing a tubular mount device, including the step of fixing the metal plate to the bracket.

According to such a method of the present invention, since the mount body can be assembled to the bracket at the same time when the bracket is formed, the cylindrical mount device according to the present invention as set forth in claim 1 can be easily manufactured. You can do it.

Further, according to the method of the present invention, it is possible to deform the metal sleeve by the resin filling pressure at the time of molding the bracket so as 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, the mount body and the bracket may be separately formed, and the mount body may be press-fitted into the mount mounting hole of the bracket, and may be adhered as necessary to manufacture.

Further, in the method of the present invention, as described in claim 7, the edge of the metal plate is positioned so as to project into the molding cavity, and the mount main body is set in the molding die of the bracket. It is also possible to fix the edge portion of the metal plate by embedding and fixing it in the inside of the bracket by forming the above, thereby improving the fixing strength of the metal plate to the bracket without requiring a special process. You can

Further, in the method of the present invention, it is also possible to integrally form the locking projections that project inwardly at the peripheral edges of both sides of the cylindrical portion of the bracket and contact both axial end surfaces of the metal plate. With these locking protrusions, the holding force of the bracket with respect to the mount body in the axial direction can be improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

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 mounting the power unit on either one of the power unit and the vehicle body, the power unit can be vibration-isolatedly supported on 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.
And a substantially semi-cylindrical tubular portion 22 that is integrally formed so as to project on one surface. The inner hole of the cylindrical body portion 22 constitutes the mount mounting hole 14 having a substantially tunnel shape.

Further, both sides in the width direction of the base plate portion 20 project outward from the tubular body portion 22 by a predetermined length, and a plurality of tubular fittings 28 are embedded in each of these overhanging portions 26. . Then, the bracket 12 is attached to the power unit side (not shown) or the vehicle body side by bolts or the like that are inserted into the respective mounting fittings 28.

Further, an inner cylindrical 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 outer diameter of the bracket 12 is slightly smaller than the inner diameter of the semicircular portion of the tubular portion 22. The metal plate 30 is not bonded to the outer peripheral surface of the rubber elastic body 18 on the side of the space 29, and the surface of the rubber elastic body 18 is directly exposed in the space 29.

The outer peripheral surface of the metal plate 30 is fixed to the inner peripheral surface of the mount mounting hole 14 of the cylindrical body portion 22 of the bracket 12, so that the main rubber elastic body 18 has a bracket on the outer peripheral surface side. The inner tubular metal fitting 16 is attached to the bracket 12 so that the main rubber elastic body 1 is attached to the main rubber elastic body 1.
8 elastically connected. The inner cylinder metal fitting 1
Since the space 29 is formed between 6 and the base plate portion 20 of the bracket 12, the main rubber elastic body 18 is substantially disposed between the inner tubular metal member 16 and the tubular body portion 22 of the bracket 12. It is only installed.

Further, in this embodiment, the direction in which the inner tubular metal member 16 is separated from the base plate 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.

Furthermore, in this embodiment, the metal plate 3 is used.
Flange-like portions 36 that spread radially outward are integrally formed on both sides in the axial direction of 0. The flange-shaped portions 36, 36 are superposed on the axial end surface of the tubular portion 22 of the bracket 12, thereby forming a protective cover that covers the axial end surface of the tubular portion 22. There is.

Here, the metal plate 30 is fixed to the bracket 12 by, for example, manufacturing a mount main body which is an integrally vulcanization molded product of the main rubber elastic body 18 having the inner tubular metal member 16 and the metal plate 30, and then Mounting rubber layer 32
Adhesive treatment is performed by applying a suitable adhesive to the outer peripheral surface of the bracket, and then the mount body is set in the mold of the bracket 12 and heated and melted in the molding cavity formed on the outer peripheral side of the metal plate 30. By molding the bracket 12 by filling it with a synthetic resin material, it can be advantageously performed simultaneously with the formation of the bracket 12.

In the engine mount 10 having the above 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.

Moreover, since the metal plate 30 can be easily formed by press-molding a metal plate, excellent manufacturability and cost performance are exhibited.

In the engine mount 10 of this embodiment, the axial end surface of the tubular portion 22 of the bracket 12 is protected by the flange-shaped portion 36 formed integrally with the metal plate 30. Even when the vehicle body is relatively displaced in the mounting axial direction and another member comes into contact with the axial end surface of the tubular portion 22, there is an advantage that the bracket 12 is prevented from being damaged. Prevention can be effectively achieved without the addition of special parts or the like.

It should be noted that such a protective cover structure for the cylindrical portion 22 by the flange portion 36 does not necessarily have to be adopted, and in the present invention, for example, as shown in FIG. It is also possible to employ a metal plate 30 that 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.

Further, as described above, when the mount main body is set in the molding die of the bracket 12 and the bracket 12 is molded on the outer peripheral side of the metal plate 30, for example, the axial end edges 40 of the metal plate 30 are used. , 40 are projected into the molding cavities of the bracket 12 to mold the bracket 12, so as to form the bracket 12 as shown in FIG.
Can be embedded in the tubular portion 22 of the bracket 12 so as to be mechanically engaged and held to be fixed, whereby the fixing force of the metal plate 30 to the bracket 12 can be improved.

Next, FIG. 5 shows an engine mount as another embodiment of the present invention. In addition, in the present embodiment, the members and parts having the same structure as the first embodiment are denoted by the same reference numerals as those in the first embodiment in the drawings, respectively, and their details will be described. Description is omitted.

That is, in the engine mount of this embodiment, the metal plate 30 vulcanized and bonded to the outer peripheral surface of the main rubber elastic body 18 is extended by a predetermined length at the opening edge portion on the side of the space 29. Along with those extensions 4
The reference numerals 2 and 42 are bent in a direction (outer side) away from each other. Then, each of the extended portions 42 extends into the overhanging portion 26 of the base plate portion 20 of the bracket 12, is embedded in substantially the entire overhanging portion 26, and is disposed in the overhanging portion 26. It is fixed to the mounting bracket 28 provided. In addition, this extension 4
The fixing of the second member 2 to the mounting member 28 can be performed by concave-convex engagement, press-fitting, welding or the like.

In the engine mount having such a structure, since the metal plate 30 is directly fixed to the mounting fitting 28, the load input from the main rubber elastic body 18 to the metal plate 30 is It is directly transmitted from the metal plate 30 to the power unit side or the vehicle body side via the mounting bracket 28. Therefore, the acting load on the portion of the bracket 12 formed of the synthetic resin material is substantially reduced, and as a result, the input load strength of the engine mount is more advantageously ensured.

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, the shape of the mount mounting hole of the bracket is determined in accordance with 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, various shapes such as a rectangular shape can be appropriately adopted.

Further, in the above-described embodiment, the overhanging portions 26, 2 for attaching the bracket 12 to the power unit or the like.
6 is provided, but such an overhanging portion is not necessarily provided, and the bracket is attached to the power unit or the like by the band plate-like fixing metal fitting wound around the outer peripheral surface of the bracket, or provided on the power unit or the like. It is also possible to mount the bracket by press-fitting and fixing it in the mounting hole.

Further, in the above embodiment, the mount body is assembled to the bracket at the same time when the bracket is molded. However, in addition, the bracket and the mount body are separately formed, and the mount body is press-fitted into the mount mounting hole of the bracket. By fixing or fixing with post-adhesion,
It is also possible to attach the mount body to the bracket.

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

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, the present invention can be implemented in a form in which various changes, modifications, improvements, and the like are made.
It goes without saying that all such embodiments are included within the scope of the present invention, without departing from the spirit of the present invention.

[0044]

As is apparent from the above description, in the cylindrical mount device having the structure according to the present invention, the load applied from the rubber elastic body is dispersed in a wide range by the metal plate and transmitted to the bracket. 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 metal plate has a non-cylindrical shape with an opening, it is extremely easy to manufacture and the manufacturing cost can be greatly suppressed.

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

[Brief description of the drawings]

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

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

FIG. 3 is a vertical sectional view showing an engine mount as another embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing an engine mount as still another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an engine mount as still another embodiment of the present invention.

[Explanation of symbols]

 10 Engine Mount 12 Bracket 14 Mount Mounting Hole 16 Inner Tube Metal Fitting 18 Main Body Rubber Elastic Body 30 Metal Plate

Claims (7)

[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, between the shaft member and the bracket, a penetrating cavity that penetrates in the axial direction is provided on one side of the shaft member that is sandwiched in the axis-perpendicular direction. While exposing the surface of the body, with respect to the outer peripheral surface of the main rubber elastic body on the other side of the shaft member sandwiching the shaft member in a direction perpendicular to the axis, bend or curve toward the through space side. A cylindrical mount device, wherein an open metal plate is adhered, and the outer peripheral surface of the main rubber elastic body is fixed to the inner peripheral surface of the mount mounting hole of the bracket through the metal plate. 2. The cylindrical mount device according to claim 1, wherein the metal plate is a press-molded product. 3. The protective cover portion, which is superposed on the axial end surface of the peripheral wall portion of the mount mounting hole in the bracket and covers the axial end surface, is integrally formed with the metal plate. The cylindrical mount device described. 4. A mounting metal fitting for mounting the bracket to one member that is vibration-proof connected, is fixed to the bracket, and the metal plate is connected and fixed to the mounting metal fitting. Item 4. The cylindrical mount device according to any one of Items 1 to 3. 5. The bracket has a substantially plate-shaped base portion,
It has a substantially semi-cylindrical cylindrical body portion that projects on one surface of the substrate portion and forms the mount mounting hole between the substrate portion and the substrate portion, and the substrate portion is an outer circumference of the cylindrical body portion. A pair of mounting parts are formed by protruding from the surface on both sides in the direction perpendicular to the axis,
Mounting brackets for mounting the bracket to one of the members that are vibration-proof connected are fixed to the mounting portions, while the through space is provided between the shaft member and the substrate portion in the mount mounting hole. Is provided, the main body rubber elastic body is substantially disposed between the shaft member and the cylindrical body portion, and the metal plate adhered to the outer peripheral surface of the main body rubber elastic body is 5. The tubular mount device according to claim 1, wherein the tubular mount device is bent outward on both sides in the opening on the side of the base plate, extends into each of the mounting portions of the bracket, and is connected and fixed to each of the mounting fittings. 6. The method for manufacturing a cylindrical mount device according to claim 1, wherein a mount main body in which the shaft member and the metal plate are bonded to the main body rubber elastic body is prepared. And a step of setting the mount body in the mold of the bracket,
Filling the molding cavity of the molding die with a resin material to form the bracket on the outer peripheral surface of the metal plate in the mount body, and fixing the metal plate to the bracket. A method for manufacturing a characteristic cylindrical mount device. 7. The edge of the metal plate is formed by positioning the edge portion of the metal plate in the molding cavity so that the mount body is set in a mold for the bracket and forming the bracket. The method for manufacturing a tubular mount device according to claim 6, wherein the portion is embedded and fixed inside the bracket.