JP5851874B2 - Bracket for vibration isolator - Google Patents

Description

  The present invention surrounds each of the bushing type and other types of vibration isolator, for example, the vibration isolation member and the rigid attachment member coupled to the vibration generation side member, and is coupled to the vibration transmission side member, for example. This is related to a vibration isolator bracket. For a large impact input, etc., the rigid attachment member connected to the vibration generating member is released from the restraint, and the shock transmitting member is unintentionally shocked. We propose a technique to prevent large input.

A conventional bracket for a bush type vibration isolator is disclosed in Patent Document 1.
This is because a resin-made bracket formed integrally with a vulcanized rubber molded body is blended with “fibrous filler, needle-like, plate-like or flaky filler, or layered silicate filler. It is characterized in that it is composed of a laminated body having a multi-layered monolithic laminated structure, each formed of a resin material.

And according to this conventional bracket, the bracket is “a laminated body having a structure in which a plurality of layers made of a resin material mixed and incorporated with a predetermined filler in a fiber state are integrally laminated. From what is configured, the layer thickness of each layer of such a laminate can be made thinner than in the case of a single layer structure that molds the entire bracket at once, thereby It is possible to effectively reduce the occurrence of nests and cracks due to resin sinks that are caused during molding, so that strength and fatigue resistance can be advantageously improved.
In addition, each layer of the laminate that provides such a bracket is formed of a resin material that contains and contains a predetermined filler such as a fibrous material, so that the filler can be made more than a single molded body. In the molding of the molded body, it is possible to orient the resin in the flow direction of the resin, which can further contribute to the improvement of strength and fatigue resistance.
Then, a resin bracket is formed by a laminate, and each layer constituting the bracket is configured by a thin layer made of a resin material containing and containing a predetermined filler such as a fibrous material. As a result, it is possible to reduce the total thickness of the bracket as a result of the high strength being realized, and thus the cost can be reduced. "

Japanese Patent Laid-Open No. 2003-200531

  However, according to this prior art, since the orientation directions of fillers such as fibers in the respective layers of the laminated body having a multi-layered laminated structure are the same, the strength of the bracket as a whole is directional. Therefore, there is a problem in that high strength and excellent fatigue resistance cannot be exerted with respect to an input in a direction intersecting the orientation direction of the filler such as a fibrous shape, for example, a direction orthogonal to the orientation direction. was there.

  Therefore, in order to solve such problems of the prior art, by joining the glass fiber woven fabric to the synthetic resin material, it is possible to input in any direction with respect to the bracket under sufficient weight reduction of the bracket. However, a manufacturing technique for a vibration isolator bracket has been proposed that exhibits much higher strength than conventional techniques and can exhibit higher fatigue resistance.

  However, in this proposed technology, the bracket is reinforced with a reinforcing material made of a woven fabric made of glass fiber woven fabric and extending in a direction perpendicular to each other under mutual restraint. Based on the action of the reinforcing material made of, because it has high strength not only in the fiber extending direction but also in the input in various directions intersecting the fiber extending direction, When applied as an engine mount for automobiles, for example, the engine may not be released from the engine mount due to the inertial displacement of the engine caused by a large impact input due to a car collision or the like. Since the impact input will be transmitted, not only will the ride comfort of the vehicle be significantly reduced, but there will be no significant damage to the vehicle body. There is a problem that becomes.

  The present invention effectively solves such problems, and in the bracket for a vibration isolator formed by joining a reinforcing material made of glass fiber fabric, it is still effective for the large impact input as described above. On the other hand, for example, by releasing the vibration-generating member intentionally, it is possible to sufficiently secure the safety of the boarding vehicle, etc., and effectively eliminate the possibility of serious damage to the vehicle body. An object of the present invention is to provide a bracket for an anti-vibration device.

  The bracket for an anti-vibration device according to the present invention includes an anti-vibration member that may have a flow damping function part for an incompressible liquid of an anti-vibration device such as a bush type or a liquid seal type, and a vibration generation side or vibration Surrounding each of the rigid mounting members connected to either one of the transmission sides and connected to the vibration generation side or the other side of the vibration transmission side, a reinforcing material made of glass fiber fabric is attached to the bracket. Is bonded to a synthetic resin material such as 6-6 nylon or aromatic nylon under the intervention of a thermoplastic resin sheet or film such as 6-6 nylon, 6 nylon, or polypropylene. In the cross section of the surrounding area with respect to the vibration isolating member and the rigid mounting member, the material is extended along the surrounding area, for example, over a length range of 1/2 or more of the circumferential length of the surrounding area. Together extend Te, extending the middle of at least one point of the reinforcing material, in which the cross-sectional area of the reinforcing member itself is provided with a volume reducing section becomes smaller than the other portions of the stiffener.

  Here, “the cross-sectional area of the reinforcing material itself is small” means to include the case where the cross-sectional area of the reinforcing material itself is zero, and compared to other parts of the reinforcing material, In addition to the case where the cross-sectional area is small in the width direction of the reinforcing material, this also includes the case where the cross-sectional area is small in the thickness direction of the reinforcing material.

  Therefore, in this bracket, at least one part in the middle of the extension of the reinforcing material is provided with a notch for cutting out the reinforcing material in the width direction, and the reinforcing material is provided in the direction of the extension in at least one part in the middle of the extension of the reinforcing material. Providing a cutting part to be separated, drilling a hole penetrating the reinforcing material in at least one place in the middle of extending the reinforcing material, reducing the thickness of the reinforcing material in at least one place in the middle of extending the reinforcing material It is preferable to provide a thin portion.

  In the vibration isolator bracket of the present invention, the reinforcement of the glass fiber fabric is bonded to the synthetic resin material such as 6-6 nylon, which is the main body of the bracket, thereby reducing the weight and the strength of the bracket. On the other hand, for excessive increase in strength caused by bonding the glass fiber fabric, at least one required part of the reinforcing material in the middle of extension of the reinforcing material A volume reduction part that reduces the cross-sectional area of the reinforcing material itself as compared with that of the reinforcing material itself is provided, and when the impact input or other large input is applied to the bracket, the bracket is made artificial at the part corresponding to the volume reduction part. For example, when the bracket according to the present invention is applied as an automobile engine mount, the engine can be released to a required position. The occupant safety, etc. can be sufficiently ensured, also, it is possible to effectively prevent the generation of a large damage to the vehicle body.

  Here, the bonding strength between the synthetic resin material that is the main component of the bracket and the glass fiber fabric, more directly, heat of 6-6 nylon, 6 nylon, polypropylene, etc. laminated on both surfaces of the glass fiber fabric. The bonding strength between the plastic resin sheet or film and the synthetic resin material can be sufficiently ensured, for example, by making the injection temperature of the synthetic resin material higher than the melting temperature of the thermoplastic resin sheet or film. Unintentional peeling of the thermoplastic resin sheet or film can be sufficiently prevented.

  In such a bracket, the reinforcing member is placed along the surrounding area in the transverse section of the surrounding area with respect to the vibration isolating member and the rigid mounting member, for example, the circumference of the surrounding area excluding the bottom portion of the bracket. By extending continuously over a length range of 1/2 or more, the reinforcing strength of the bracket can be sufficiently increased, and the required strength can be reliably imparted to the bracket.

  By the way, the reinforcing material is cut in the width direction as a volume reducing portion which is provided in at least one place in the middle of the extending of the reinforcing member and has a reduced cross-sectional area of the reinforcing material itself as compared with other parts of the reinforcing material. When a notch is provided, when a cut portion is provided for separating the reinforcing material in the extending direction, when a hole is formed through the reinforcing material in the thickness direction, and a thin portion for reducing the thickness of the reinforcing material is provided. In any case, the bracket can be reliably broken at a position as expected for a large input.

It is the front view, side view, and top view which show embodiment of this invention. FIG. 2 is a front view, a side view, and a plan view illustrating a molding mode of a glass fiber fabric bonded to a synthetic resin material that is a main body of a bracket in the embodiment shown in FIG. It is a perspective view which illustrates the shaping | molding aspect of the glass fiber fabric applicable to embodiment shown in FIG. It is a front view which illustrates the other shaping | molding aspect of a glass fiber fabric.

Embodiments of the present invention will be described below based on the drawings.
In FIG. 1, reference numeral 1 denotes a vibration isolator bracket according to the present invention, and the bracket 1 has a substantially rectangular outline-shaped through hole 2 in the central portion.

  An anti-vibration member (not shown) that is mainly composed of rubber or other elastic body and may have a flow damping mechanism for an incompressible liquid is joined to the peripheral surface of the through hole 2 by adhesive bonding or the like, and On the inner peripheral surface of the vibration isolating member, for example, a hollow or solid member made of a metal material can be used, which is connected to a member on either the vibration generating side or the vibration transmitting side, which is also not shown. By vulcanizing and adhesive bonding the member, the bracket 1 can contribute to the configuration of the vibration isolator, and the bracket itself is the bottom portion of the vibration generation side or vibration transmission side. These members are connected by a connecting portion provided in the flange portion 1a, for example, a bolt hole 1b.

  Here, the bracket 1 shown in the figure is made of a glass fiber fabric, a reinforcing material 3 indicated by a broken line in the drawing, a synthetic resin material such as 6-6 nylon which does not include a reinforcing filler, which is the main body of the bracket 1. 4 and fusion bonded.

  By the way, the reinforcing material 3 here is formed by laminating sheets or films made of a required thermoplastic resin such as 6-6 nylon, 6 nylon, polypropylene, etc. on both surfaces of the glass fiber fabric, and has a thickness of, for example, 2 to 8 mm. The reinforcing material is cut into a predetermined size, and the cut material is molded by hot press molding or the like into a form suitable for the bracket 1 shown in FIG. 1, as shown in FIG. Is a synthetic resin material 4 which is the main body of the bracket 1, for example 66 nylon, preferably a sheet of thermoplastic resin such as 6-6 nylon, 6 nylon or polypropylene. Or, it is injected into the injection molding cavity at a temperature higher than the melting point of the film. Thereby, the sheet or film laminated on both surfaces of the glass fiber fabric is melted over the entire thickness by the synthetic resin material 4 under high temperature, and a part thereof is impregnated into the glass fiber fabric. The bond between them can be strengthened. Even at such a high temperature, the glass fiber fabric is not affected and the desired strength is maintained.

Here, as is clear from the side view shown in FIG. 2B, the reinforcing material shown in FIG. 2 is an example of a volume reducing portion with a reduced cross-sectional area at least at one point during the extension of the reinforcing material 3. The notch 5 is formed by cutting the reinforcing material 3 in the width direction from both sides in the width direction.
According to such a reinforcing material 3, the reinforcing effect of the bracket 1 is greatly reduced at the portion of the bracket 1 corresponding to the formation portion of the notch 5. Therefore, the reinforcing material 3 is fused to the synthetic resin material 4. When the bracket 1 is formed by joining, the weight of the bracket 1 is reduced with the synthetic resin material 4, and the required strength of the bracket 1 is increased while the required strength is given to the bracket 1 with the reinforcing material 4. An excessive increase in strength can be effectively prevented based on the strength lowering action of the bracket 1 by the notch 5, so that the bracket 1 corresponds to the formation position of the notch 5 for a large input such as an impact input. It can be reliably broken at a required position.

  2B, two notches 5 are formed from both sides of the reinforcing material 3 in the width direction. However, the number of notches 5 formed, the depth of formation of the notches 5 and the like are reinforced. It can be appropriately selected based on the required degree of strength reduction in relation to the cross-sectional area of the other part of the material 3.

By the way, other than the notch 5 other than the notch 5 is provided in at least one place in the middle of the extension of the reinforcing material 3 and the volume reducing portion in which the cross-sectional area of the reinforcing material itself is smaller than the other part of the reinforcing material 3. As an example, as illustrated in a perspective view in FIG. 3, a cut portion 6 (FIG. 3B) that separates the reinforcing material 3 in the extending direction, and a hole 7 that penetrates the reinforcing material 3 in its thickness direction. (FIG. 3 (b)) or a thin-walled portion 8 (FIG. 3 (c)) that reduces the thickness of the reinforcing material 3 from at least one side of the inner and outer surfaces and becomes laser processing, cutting, grinding, etc. ) May be considered.
Here, the number of holes 7, the size or the number of thin-walled portions 8, the opening width, the length, the depth, etc. are related to the cross-sectional area of the other part of the reinforcing member 3 as described above. An appropriate selection can be made based on the required degree of strength reduction.

  FIG. 4 is a front view illustrating another molding mode of the glass fiber fabric, and the front contour shape of the reinforcing material 3 can be, for example, an ohmic contour shape as shown in FIG. As shown in FIG. 4B, a triangular mountain-shaped contour shape with a flange portion or the like can be used.

  When the reinforcing material 3 is molded in the form illustrated in FIG. 4, the required synthetic resin material 4 is injection-molded, for example, on the outer peripheral surface of the reinforcing material 3 and between the flange portions. When the reinforcing material 3 shown in FIG. 4 (a) is applied, the semicircular through hole 2 is provided, and when the reinforcing material 3 shown in FIG. 4 (b) is applied, the triangular through hole 2 is provided. The brackets 1 having the above are formed.

  Here, each of the reinforcing members 3 illustrated in each of FIGS. 2 to 4 is connected to each flange portion 3a as a connecting portion to the other side of the vibration generating side or the vibration transmitting side. It has the bolt hole 3b which will be located overlapping with the bolt hole 1b formed in 1a.

  As mentioned above, although embodiment of this invention was described based on the place shown in a drawing, the front shape of reinforcing material 3 and bracket 1, the outline shape of penetration hole 2, etc. can be suitably chosen as needed, The bracket 1 can be connected to a member on one side of the vibration generating side or the vibration transmitting side instead of the rigid mounting member.

DESCRIPTION OF SYMBOLS 1 Bracket 1a Flange part 1b Bolt hole 2 Through-hole 3 Reinforcement material 3a Flange part 3b Bolt hole 4 Synthetic resin material 5 Notch 6 Cutting part 7 Hole 8 Thin part

Claims (5)

Surrounds each of the vibration isolation member and the rigid attachment member connected to either the vibration generation side or the vibration transmission side of the vibration isolation device, and is connected to the other side of the vibration generation side or the vibration transmission side. A vibration isolator bracket,
A reinforcing material made of glass fiber fabric is joined to a synthetic resin material that is the main component of the bracket, and the reinforcing material is placed along the surrounding area in the transverse cross section of the surrounding area with respect to the vibration isolating member and the rigid mounting member. And at least one part in the middle of the extension of the reinforcing material is provided with a volume reducing portion in which the cross-sectional area of the reinforcing material itself is smaller than the other parts of the reinforcing material. bracket.   The anti-vibration device bracket according to claim 1, wherein a notch is provided in at least one location in the middle of the extension of the reinforcing material to cut out the reinforcing material in the width direction.   The anti-vibration device bracket according to claim 1, wherein a cutting portion for separating the reinforcing material in the extending direction is provided at least at one point in the middle of the extending of the reinforcing material.   The anti-vibration device bracket according to claim 1, wherein a hole penetrating the reinforcing material is formed in at least one place in the middle of the extending of the reinforcing material.   The anti-vibration device bracket according to claim 1, wherein a thin-walled portion for reducing the thickness of the reinforcing material is provided at least at one point along the extending direction of the reinforcing material.

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