JP2016169829A - Vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proof device that can be manufactured by a simple method where a spring rate in a direction different from an inputting direction of main vibration is sufficiently controlled.SOLUTION: This invention relates to a vibration-proof device 1 comprising an outer fixing member 2 connected to any one of a vibration generating part and a vibration receiving part, an inner fixing member 3 connected to the other, and a resilient body 4 connecting these members 2, 3. The outer fixing member 2 is formed into a cylindrical shape, the inner fixing member 3 comprises a rigid member 31 arranged in the outer fixing member 2 and an inner installed member 32 positioned in the outer fixing member 2 and made of synthetic resin material fixed to the rigid member 31. The inner installed member 32 is formed with a first protrusion part 32a protruded toward outside in a radial direction. The outer fixing member 2 is formed with a second protruding part 24a protruded toward inside in a radial direction. The first protrusion part 32a and the second protrusion part 24a are coincided to each other at their circumferential directions and their axial positions are made different to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration isolator.

  2. Description of the Related Art Conventionally, as a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generation unit such as an engine or a drive device, the vibration generation unit and the vibration receiving unit are coupled to each other. There is known a vibration isolator including an outer attachment member, an inner attachment member connected to the other, and an elastic body connecting the outer attachment member and the inner attachment member.

  In this type of vibration isolator, the spring ratio in the three directions of the apparatus (the axial direction of the vibration isolator and the two directions orthogonal to the axial direction) is adjusted with respect to the vibration that can be input, so It is known to absorb and damp vibrations. For example, in Patent Document 1, in a cylindrical bush that includes an inner cylinder, an outer cylinder that surrounds the inner cylinder, and an elastic member that communicates between the inner and outer cylinders, the main vibration input direction is the direction perpendicular to the axis of the inner cylinder. A protrusion projecting radially from the inner cylinder so as to be substantially parallel to the input direction of the main vibration, and connecting the protrusion and the outer cylinder with an elastic body, and connecting the elastic body with the outer cylinder An elastic body support part is provided between the two parts, and the elastic body support does not restrict movement of the projecting part in the main vibration input direction out of the three orthogonal axes including the main vibration input direction as one axis. A cylindrical bush characterized by restricting the remaining two axial directions has been proposed.

JP 2005-155822 A

  Here, in the vibration isolator as described above, the spring ratio in a direction different from the input direction of the main vibration can be adjusted, but it is required to provide a vibration isolator that can be manufactured by a simpler method. It was.

  Therefore, an object of the present invention is to provide a vibration isolator that can be manufactured by a simple method in which the spring ratio in a direction different from the main vibration input direction is controlled.

The vibration isolator of the present invention includes an outer mounting member coupled to one of the vibration generating unit and the vibration receiving unit, an inner mounting member coupled to the other, the outer mounting member and the inner mounting member. The outer mounting member is formed in a cylindrical shape, the inner mounting member is a rigid member disposed in the outer mounting member, and a central axis of the outer mounting member. And an interior member made of an injection molding material (mainly a synthetic resin material or an aluminum material) located in the outer mounting member and fixed to the rigid member in the axial direction along, A first protrusion that protrudes outward in the radial direction orthogonal to the axial direction is formed, and a second protrusion that protrudes inward in the radial direction is formed in the outer mounting member, The first The projecting portion and the second projecting portion are arranged such that circumferential positions along the central axis of the outer mounting member coincide with each other and the axial positions are different from each other. .
According to the vibration isolator of the present invention, a vibration isolator having a controlled spring ratio in a direction different from the main vibration input direction can be manufactured by a simple method.

  Here, in the vibration isolator of the present invention, the rigid member is preferably formed in a plate shape. According to this structure, it can manufacture by a simpler method.

  Moreover, in the vibration isolator of this invention, it is preferable that the said interior member has covered the said rigid member over the perimeter. According to this configuration, the interior member can be firmly fixed to the rigid member.

Moreover, in the vibration isolator of the present invention, a concave portion that is recessed in the radial direction is formed in a portion of the rigid member that is located in the outer mounting member, and the injection molding material (mainly a synthetic resin material) is formed in the concave portion. Or an aluminum material or the like), and the interior member is preferably fixed. According to this configuration, the interior member can be firmly and reliably fixed to the rigid member.
In this case, in the vibration isolator of the present invention, it is preferable that the recess is formed on the surface of the rigid member. According to this configuration, the concave portion of the rigid member can be easily formed by, for example, pressing.

  Further, in the vibration isolator of the present invention, the rigid member is provided with a hollow portion formed so as to narrow the width of the rigid member at least in a portion located in the outer mounting member, and the inner side of the hollow portion. It is preferable that the interior member is fixed to the wall. According to this configuration, the rigid member can be reduced in weight, and the interior member can be more firmly fixed to the rigid member.

  In the vibration isolator of the present invention, it is preferable that the first protrusion and the second protrusion are opposed to each other in the axial direction. According to this configuration, the axial spring constant can be further increased.

  In the vibration isolator of the present invention, any one of the first protrusion and the second protrusion is formed with an interval in the axial direction, and the other is disposed therebetween. It is preferable that According to this configuration, the spring constant on both sides in the axial direction can be further increased.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration isolator which can be manufactured with a simple method which controlled the spring ratio of the direction different from the input direction of main vibration can be provided.

It is a longitudinal cross-sectional view which shows the vibration isolator which concerns on the 1st Embodiment of this invention. It is a figure which shows the longitudinal cross section in alignment with the a-a 'line | wire of the vibration isolator shown in FIG. It is a perspective view which shows the inner side attachment member of the vibration isolator shown in FIG. It is a longitudinal cross-sectional view which shows the vibration isolator which concerns on the 2nd Embodiment of this invention. It is a figure which shows the longitudinal cross section in alignment with the b-b 'line | wire of the vibration isolator shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a vibration isolator according to the first embodiment of the present invention, and FIG. 1 is a longitudinal sectional view at a position where a first protrusion and a second protrusion described later are disposed. FIG. 2 is a longitudinal sectional view taken along the line aa ′ orthogonal to the longitudinal sectional view shown in FIG. FIG. 3 is a perspective view showing an inner mounting member of the vibration isolator according to the first embodiment. 4 and 5 show a vibration isolator according to the second embodiment of the present invention, and FIG. 4 is a longitudinal sectional view at a position where a first protrusion and a second protrusion described later are not disposed. FIG. 5 is a vertical cross-sectional view taken along line bb ′ at a position orthogonal to the vertical cross-sectional view shown in FIG. 4 and provided with the first protrusion and the second protrusion.

The vibration isolator 1 according to the first embodiment of the present invention is disposed at, for example, a connecting portion between a trailing arm (vibration generating unit) of a trailing arm type rear suspension and a vehicle body (vibration receiving unit). Transmission of vibration and impact from the vibration generating unit to the vibration receiving unit can be prevented.
As shown in FIGS. 1 and 2, the vibration isolator 1 includes an outer mounting member 2 connected to one of the vibration generating unit and the vibration receiving unit, an inner mounting member 3 connected to the other, and an outer side. And an elastic body 4 that connects the attachment member 2 and the inner attachment member 3.
In the illustrated example, the outer mounting member 2, the inner mounting member 3, and the elastic body 4 are arranged so as to have a common axis coaxially. Hereinafter, this common axis is also referred to as a central axis O, a direction along the central axis O is referred to as an axial direction, a direction orthogonal to the central axis O is referred to as a radial direction, and a direction around the central axis O is referred to as a circumferential direction.

The outer mounting member 2 includes a cylindrical outer cylinder 21 that forms the outer surface of the outer mounting member 2 (the outer surface of the vibration isolator 1). The outer cylinder 21 is formed in a cylindrical shape from, for example, a metal material, and the outer cylinder 21 is connected to and fixed to a trailing arm (not shown) serving as a vibration generating unit, for example.
Further, the outer mounting member 2 includes a pair of ring portions 22 and a pair of ring portions 22 that are located at the end portions in the axial direction on the radially inner side of the outer cylinder 21 and extend over the entire circumference of the end portions. It has the connection part 23 shown in FIG. 2 connected in a convex shape toward the radially inner side. In the illustrated example, the connecting portion 23 includes an intermediate portion 23a extending along the axial direction and a side portion 23b connecting the intermediate portion 23a and the ring portions 22 on both sides, and is symmetrical with respect to the central axis O. One pair is provided. Further, the pair of ring portions 22 in the axial direction and the pair of connection portions 23 in the radial direction are integrally formed.
Further, the outer mounting member 2 is disposed between the pair of ring portions 22 in the axial direction on the radially inner side of the outer cylinder 21 and at a circumferential position where the pair of connection portions 23 are not disposed. The orifice portion 24 is provided. In this embodiment, the outer mounting member 2 is provided with a pair of orifice portions 24 symmetrically across the central axis O, and the orifice portion 24 forms a liquid chamber 5 described later as shown in FIG. The liquid chamber recess 41 of the elastic body 4 is fitted.
Therefore, the outer attachment member 2 includes an outer cylinder 21, a ring part 22, a connection part 23, and an orifice part 24, which are formed in a cylindrical shape as a whole.

  The orifice portion 24 can be formed of a material harder than the material forming the elastic body 4, such as a synthetic resin material or a metal such as aluminum. The orifice portion 24 is formed with a communication opening (not shown) that penetrates in the radial direction and opens into the liquid chamber 5, and two connection grooves 24 b and 24 c that are spaced apart in the axial direction. Yes. The two connection grooves 24b and 24c each extend over the entire length of the orifice portion 24 in the circumferential direction. One said communication opening is formed in the groove wall which divides any one connection groove | channel among the two connection grooves 24b and 24c. As shown in FIG. 2, in the elastic body 4, one communication groove 42 for communicating the insides of the two liquid chambers 5 is formed in the region between the liquid chambers 5 in the circumferential direction. The communication groove 42 of the elastic body 4 is one of the two connection grooves 24b and 24c, and one of the peripheral end portions on both sides of the connection groove with respect to one connection groove in which the communication opening is formed. The other connection groove that is connected to the peripheral end portion and has no communication opening is connected to both of the peripheral end portions.

The inner mounting member 3 includes a rigid member 31 disposed in the outer mounting member 2 and an injection molding material (mainly a synthetic resin material) positioned in the outer mounting member 2 and fixed to the rigid member 31 in the axial direction. Or an interior member 32 made of an aluminum material or the like.
The rigid member 31 can be formed of, for example, a metal material. In this embodiment, the rigid member 31 has a predetermined width (a radial width in the longitudinal section of FIG. 1) and a rectangular parallelepiped shape (plate shape) extending along the axial direction. ). In this embodiment, the width of the rigid member 31 is narrower than the inner diameter of the outer mounting member 2, and the length measured along the axial direction of the rigid member 31 is the same as that of the outer mounting member 2. It is longer than the length measured along the axial direction.
Moreover, in this embodiment, the axial direction both ends of the rigid member 31 are axially outward from both axial ends of the outer mounting member 2 in a state where the rigid member 31 is disposed in the outer mounting member 2. It becomes the protrusion part 31a which protrudes. The rigid member 31 is formed so that the lengths of the protruding portions 31 a on both sides of the rigid member 31 are the same, and is disposed in the outer mounting member 2.
In addition, the shape including the protrusion part 31a of the rigid member 31 can be made into arbitrary shapes, and the whole or one part can also be made into a cylindrical shape or a column.

  In this embodiment, corner portions 31b (corner portions of the protruding portions 31a) 31b on both ends in the axial direction of the rigid member 31 are chamfered, and the shape of the corner portions 31b is arcuate in plan view. Each projecting portion 31a is formed with a mounting hole 31c that opens in the thickness direction of the rigid member 31, in other words, penetrates the front and back surfaces of the rigid member 31, and is connected to the vibration generating portion or the vibration receiving portion. Can do. More specifically, the mounting hole 31c has a circular shape having a center at the center in the width direction (in this example, on the central axis O) of the rigid member 31 (projecting portion 31a). The fastening member is inserted and can be connected to a vehicle body or the like which is a vibration receiving portion. The rigid member 31 (protruding portion 31a) can be connected to the vibration generating portion or the vibration receiving portion arbitrarily. In addition to the connection by a fastening member such as a bolt, the protruding portion 31a and the vibration generating portion or vibration are connected. The receiving part can also be connected by welding.

  In this embodiment, the rigid member 31 is symmetrical at least in a portion located in the outer mounting member 2 with a recess 31d formed so as to narrow the width of the rigid member 31, and with the center axis O in the illustrated example. A pair of depressions 31d is provided. Specifically, the recess 31d is not particularly limited, but in the illustrated example, the length from the center in the width direction to the side surface of the rigid member 31 is smaller than the length of the portion other than the recess 31d. It is formed by becoming. More specifically, the recessed portion 31d includes an inclined portion 31e in which the length from the center in the width direction to the side surface of the rigid member 31 gradually decreases from one side in the axial direction to the other side, and the inclined portion 31e. It consists of a bottom portion 31f having a constant length and an inclined portion 31e whose length gradually increases following the bottom portion 31f. The bottom portion 31f is a portion of the rigid member 31 that is located in the outer mounting member 2. Is located.

  In this embodiment, the rigid member 31 is formed with a plurality of recesses 31g that are recessed in the radial direction between portions located in the outer mounting member 2, in the illustrated example, between a pair of recesses 31d. The recess 31g is formed on the surface of the rigid member 31, specifically, in a circular shape having a center at the center in the width direction (on the central axis O in this example). In the example shown in the figure, three recesses 31g are formed at equal intervals in the extending direction of the rigid member 31 and open in the thickness direction of the rigid member 31, in other words, the front and back surfaces of the rigid member 31 are formed. It penetrates.

As shown in FIGS. 1 and 2, the interior member 32 is located in the outer mounting member 2 and is fixed to the rigid member 31. In this embodiment, the interior member 32 is fixed to the recess 31 d of the rigid member 31, and slightly projects outward from the outer mounting member 2 in the axial direction.
The interior member 32 is rigid in a state in which an injection molding material (mainly synthetic resin material or aluminum material) enters the recess 31g of the rigid member 31 in the illustrated example by insert molding using the rigid member 31 as an insert product, for example. The member 31 can be fixed.

  As shown in FIG. 3, the interior member 32 covers the rigid member 31 over its entire circumference, and is formed in a substantially cylindrical shape (both substantially cylindrical with the interior member 32 fixed to the rigid member 31). . The interior member 32 includes a first protrusion 32a, which will be described later, and a portion where the first protrusion 32a is disposed, and a main body formed in a portion corresponding to the bottom 31f of the recess 31d in the axial direction. 32b and a pair of projecting portions 32c formed in portions corresponding to the pair of inclined portions 31e of the recessed portion 31d in the axial direction.

The first protrusion 32a protrudes outward in the radial direction. In this embodiment, as shown in FIG. 1, the anti-vibration device 1 includes an outer attachment member 2 and an inner attachment member 3. In the circumferential portion where the liquid chamber 5 is formed, a pair is formed at the center in the axial direction of the interior member 32 with the central axis O interposed therebetween. In this embodiment, the first protrusions 32a are formed on both sides in the width direction of the rigid member 31 so as to protrude outward in the width direction, and specifically, a second protrusion described later. It is formed so as to protrude outward in the width direction from the surface of the interior member 32 corresponding to the axial position of 24a. Moreover, in this embodiment, the 1st protrusion part 32a is arrange | positioned in the state engage | inserted with respect to the elastic body 4 mentioned later, specifically, the indented state.
In this embodiment, as shown in FIGS. 1 to 3, in the cross section in the direction orthogonal to the axial direction, the outer peripheral surface of the main body portion 32 b is formed in a circular shape, and the longitudinal cross section shown in FIG. 1. The overhanging portion 32c has a width that is substantially the same as the width of the rigid member 31, and is wider than the main body portion 32b.

The elastic body 4 is made of, for example, a rubber material, and the inner peripheral surface thereof is fixed to the outer peripheral surface of the interior member 32 by, for example, vulcanization bonding as shown in FIG. Further, the ring portion 22 and the connection portion 23 of the outer attachment member 2 are fixed to the elastic body 4 by, for example, vulcanization adhesion, and the ring portion 22 and the connection portion 23 are embedded together with the inner attachment member 3. The elastic body 4 is disposed inside the outer cylinder 21 of the outer mounting member 2 with the orifice portion 24 mounted, and each is vulcanized and bonded, for example. Thus, the elastic body 4 elastically connects the outer mounting member 2 and the inner mounting member 3, and the outer cylinder 21 surrounds the orifice portion 24 and the elastic body 4 and covers the outer peripheral surface thereof in a liquid-tight manner. Yes.
The elastic body 4 may be press-fitted into the outer cylinder 21. In this case, both ends of the outer cylinder 21 in the axial direction may be bent toward the inner side in the radial direction to support the elastic body 4 in the axial direction.

  As shown in FIG. 1, the elastic body 4 is formed with a liquid chamber recess 41 that is recessed in a radially outward direction and defines the liquid chamber 5. In this embodiment, the elastic body 4 is spaced apart in the circumferential direction. A plurality of gaps are formed. Specifically, two liquid chamber recesses 41 are formed in the elastic body 4, and are on both sides of the central axis O in the radial direction, at positions corresponding to the first protrusions 32 a of the interior member 32. Separately, they have the same shape and size. As shown in FIG. 1, the first protrusion 32 a is fitted into the elastic body 4 at a position corresponding to the first protrusion 32 a of the interior member 32 in the liquid chamber recess 41. A convex portion 41a protruding outward in the direction is formed, whereby the liquid chamber concave portion 41 is substantially M-shaped in the longitudinal sectional view shown in FIG. In addition, it can prevent that the 1st protrusion part 32a and the orifice part 24 contact | abut directly, and the contact noise is produced because the convex part 41a of the elastic body 4 covers the 1st protrusion part 32a.

  Further, when a plurality of liquid chambers 5 are formed as in this embodiment, as shown in FIG. 2, in the elastic body 4, the region between the liquid chambers 5 in the circumferential direction is formed on the outer peripheral surface thereof. In the illustrated example, one communication groove 42 for communicating the liquid chambers 5 defined by the liquid chamber recess 41 can be formed.

In the above configuration, the communication grooves 42 of the elastic body 4 and the connection grooves 24 b and 24 c of the orifice portion 24 are covered from the outer side in the radial direction by the outer cylinder 21, thereby communicating the liquid chambers 5 adjacent in the circumferential direction. An orifice passage is defined. The orifice passage is a single passage that connects the communication opening formed in one orifice portion 24 and the communication opening formed in the other orifice portion 24.
When vibration is input to the vibration isolator 1, the elastic body 4 is elastically deformed and the internal volume of each liquid chamber 5 changes, so that the liquid in the liquid chamber 5 flows through the orifice passage. Vibration is attenuated and absorbed by causing liquid column resonance.

  In this embodiment, the communication groove 42 is formed in the elastic body 4 as a part of the orifice passage for communicating the liquid chambers 5, but the orifice portions 24 that define the liquid chambers 5 are mutually connected. It is also possible to form an orifice passage only by connecting the orifice portion 24 alone.

And the 2nd protrusion part 24a which protrudes toward an inner side of radial direction is formed in the outer side attachment member 2 as shown in FIG. In this embodiment, the 2nd protrusion part 24a is formed in the orifice part 24 of the outer side attachment member 2, respectively, and the pair of orifice part 24 is shown in the example of illustration.
Moreover, in this embodiment, the 2nd protrusion part 24a is extended and formed in the circumferential direction. These second protrusions 24a are arranged so that their positions in the circumferential direction coincide with the first protrusions 32a of the interior member 32, that is, overlap each other in the circumferential direction. Here, the circumferential position “matches with each other” means that the circumferential lengths of the respective protrusions coincide with each other and that the respective protrusions are located at exactly the same position. Instead, it suffices that at least a part of them coincides with each other in the circumferential direction, which means that at least a part of them is arranged in the circumferential direction. However, it is preferable that one of the first projecting portion 32a and the second projecting portion 24a is completely or included in the circumferential position with the other.

  Further, as shown in FIG. 1, the second projecting portions 24 a are arranged at different positions in the axial direction with respect to the first projecting portions 32 a. In this embodiment, in each of the pair of orifice portions 24 in the radial direction, the second projecting portions 24a are formed two by two spaced apart in the axial direction in the axial direction. And the two 2nd protrusion parts 24a located in the same side in the circumferential direction are arrange | positioned at the axial direction outer side with respect to the 1st protrusion part 32a. Accordingly, the first protrusion 32a is disposed between the two second protrusions 24a. Here, the fact that the positions in the axial direction are different from each other means that the apex of the first protrusion 32a and the apex of the second protrusion 24a are shifted at least in the axial direction.

In addition, in this embodiment, as shown in FIG. 1, about the 1st protrusion part 32a, the 2nd protrusion part 24a, and the convex part 41a of the elastic body 4, the 2nd protrusion part 24a and the convex part 41a of the elastic body 4 are comprised. Overlapping in the axial direction, the first protrusion 32a and the second protrusion 24a do not overlap in the axial direction, that is, the first protrusion 32a and the second protrusion 24a do not face each other in the axial direction. . However, the axial overlap of the first protrusions 32a, the second protrusions 24a, and the protrusions 41a of the elastic body 4 can be made arbitrary, and the second protrusions 24a and the protrusions 41a of the elastic bodies 4 The first protrusion 32a and the second protrusion 24a may overlap in the axial direction so that they do not overlap in the axial direction. By changing these overlapping modes, the spring ratio of the vibration isolator can be adjusted.
Further, in this embodiment, as shown in FIG. 1, the first protrusion 32a and the second protrusion 24a are provided at two locations in the circumferential direction, respectively, but the first protrusion 32a and the second protrusion 24a may be provided in a part in the circumferential direction, that is, only in one place in the circumferential direction.

Hereinafter, the operation and effect of the vibration isolator according to the first embodiment of the present invention will be described.
When the vibration isolator 1 having such a configuration is used for an automobile, for example, the outer mounting member 2 is one of a trailing arm of a trailing arm type rear suspension as a vibration generating portion and a vehicle body as a vibration receiving portion. And the inner mounting member 3 is connected to the other.
Then, vibration is applied to the vibration isolator 1 in, for example, the main vibration input direction, for example, the radial direction in the first embodiment and the axial direction orthogonal thereto, and the inner mounting member 3 and the outer mounting member 2 are axially moved. When the first protrusion 32a is formed on the inner attachment member 3 and the second protrusion 24a is formed on the outer attachment member 2, the first protrusion 32a and the second protrusion 24a respectively. The above-described displacement in the axial direction is easily suppressed, and therefore a relatively large spring force is obtained in the axial direction. As a result, the spring ratio between the main vibration input direction and the different direction can be controlled.

  Further, in this embodiment, the inner mounting member 3 includes an interior member 32 made of an injection molding material (such as a synthetic resin material or an aluminum material) that is located in the outer mounting member 2 and is fixed to the rigid member 31. Since the inner mounting member 3 can be easily formed so that the vibration isolator 1 can sufficiently exhibit desired performance (characteristics such as spring ratio and durability), the vibration isolator 1 capable of controlling the spring ratio. Can be easily manufactured. More specifically, when the rigid member 31 of the inner mounting member 3 is formed in a desired shape such as a shape that can be easily connected to the vibration generating portion or the vibration receiving portion, the inner member 32 is not provided unless the interior member 32 is provided. Although it tends to be difficult or expensive to make the vibration device 1 have a desired performance, the vibration isolation device 1 can sufficiently exhibit the desired performance by disposing the interior member 32 on the rigid member 31. Thus, since the shape etc. including the 1st protrusion part 32a of the said interior member 32 can be formed easily, the vibration isolator 1 which can control a spring ratio can be manufactured easily.

  Therefore, according to the vibration isolator 1 of the present embodiment, it is possible to provide the vibration isolator 1 that can be manufactured by a simple method in which the spring ratio between the main vibration input direction and the different direction is controlled.

Here, in the vibration isolator 1 according to this embodiment, the first projecting portion 32a and the second projecting portion 24a are disposed in both of the pair of liquid chambers 5 adjacent in the circumferential direction. And it becomes easy to displace the outer attachment member 2 straight without relatively deviating along the axial direction, so that the vibration in the axial direction can be effectively damped and absorbed.
In this embodiment, a pair of liquid chambers 5 are arranged, but the number of liquid chambers 5 may be one or may not be provided.

Moreover, in the vibration isolator 1 which concerns on this embodiment, by forming the rigid member 31 in plate shape, it can manufacture easily and can provide a low-cost vibration isolator.
Specifically, for example, as the inner mounting member 3 of the vibration isolator 1, a portion of the inner mounting member 3 that protrudes from the vibration isolator 1 (protruding portion 31a) is connected to the vibration generating unit or the vibration receiving unit. When using a flat (flat) plate, the protruding portion 31a of the inner mounting member 3 is flattened by crushing the cylinder or rod in the radial direction, or the cylinder has a flat portion. There are methods such as flattening by fitting the members. However, these methods have a problem that it is difficult or expensive to manufacture the inner mounting member 3. On the other hand, in this embodiment, since the rigid member 31 is formed in a plate shape, for example, it is not necessary to crush and deform the cylindrical body or the rod body in the radial direction, and the inner mounting member 3 includes the rigid member 31 and the interior member. 32, the inner mounting member 3 can be easily formed, whereby the vibration isolator 1 can be manufactured more easily and at low cost.

  In this embodiment, among the rigid members 31, a protruding portion 31a that protrudes outward in the axial direction along the central axis O from the outer mounting member 2 opens in the radial direction perpendicular to the axial direction, and the protruding Since the mounting hole 31c into which the fastening member that connects the portion 31a and the other of the vibration generating portion and the vibration receiving portion is inserted is provided, for example, a fastening member such as a bolt is inserted into the mounting hole 31c that opens in the radial direction. Thus, the vibration generating portion or the vibration receiving portion and the inner mounting member 3 can be easily connected. In this embodiment, since the mounting hole 31c is formed on the surface of the rigid member 31, the mounting hole 31c can be easily formed by a press or the like, for example.

  In this embodiment, since the interior member 32 covers the rigid member 31 over the entire circumference, the interior member 32 can be firmly fixed to the rigid member 31.

Furthermore, in this embodiment, a concave portion 31g is formed in a portion of the rigid member 31 located in the outer mounting member 2, and an injection molding material (synthetic resin material or aluminum material) enters the concave portion 31g. Therefore, the interior member 32 can be firmly and securely fixed to the rigid member 31.
Furthermore, since the recessed part 31g is formed in the surface of the rigid member 31, the recessed part 31g of the rigid member 31 can be easily formed by press work, for example.

  Moreover, in this embodiment, since the hollow part 31d formed so that the width | variety of the rigid member 31 may be narrowed, the rigid member 31 can be reduced in weight. Further, since the interior member 32 is fixed inside the recess 31d, the interior member 32 enters the recess 31d, thereby preventing the interior member 32 from moving along the axial direction, and the interior member 32 from the rigid member 31. Can be more firmly fixed.

  In FIG. 1, the first protrusion 32a and the second protrusion 24a are not opposed to each other in the axial direction, but by making the first protrusion 32a and the second protrusion 24a face each other in the axial direction, When the inner mounting member 3 and the outer mounting member 2 are displaced relative to each other in the axial direction, the stress caused by the displacement of one of the first projecting portion 32a and the second projecting portion 24a is counteracted by the elastic body 4. Not only the force but also the reaction force from the other of the first protrusion 32 a and the second protrusion 24 a is sufficiently received via the elastic body 4, and the axial spring constant along the central axis O of the inner mounting member 3. Can be further enhanced.

  In this embodiment, either one of the first protrusion 32a and the second protrusion 24a is formed with an interval in the axial direction, and the other is disposed between them. Therefore, when the inner mounting member 3 and the outer mounting member 2 are displaced relative to each other in the axial direction, the spring constants on both sides in the axial direction along the central axis O of the inner mounting member 3 can be further increased.

  From the viewpoint of facilitating adjustment of the spring ratio in the axial direction, it is located from the radially outer end (vertex) of the first projecting portion 32a to the axial position of the radially inner end (vertex) of the second projecting portion 24a. The length measured along the radial direction to the radially outer end of the interior member 32 is from the radially inner end (vertex) of the second projecting portion 24a to the radially inner end (vertex) of the second projecting portion 24a. It is preferable that it is more than half of the length measured along the radial direction to the radial outer end of the interior member 32 located at the axial position.

  Subsequently, a vibration isolator according to a second embodiment of the present invention will be described with reference to FIGS. Note that the description of the same elements as those described above in the description of the first embodiment is omitted as appropriate.

The vibration isolator 1 according to the second embodiment is different from the vibration isolator 1 according to the first embodiment in the following points.
First, in the second embodiment, as shown in FIGS. 4 and 5, the first projecting portion 32 a includes a liquid chamber 5 between the outer mounting member 2 and the inner mounting member 3 in the vibration isolator 1. It is formed in the circumferential direction part which is not formed. As shown in FIGS. 4 and 5, the main body portion 32 b and the overhanging portion 32 c of the interior member 32 are rigid in the cross section in the direction orthogonal to the axial direction, and the outer diameters of the overhanging portion 32 c and the main body portion 32 b are rigid. It is formed substantially the same as the width of the member 31.

  Further, in the second embodiment, as shown in FIGS. 4 and 5, the second projecting portion is not formed in the orifice portion 24, and the second projecting portion 24 a is formed in the connecting portion 23 of the outer mounting member 2. More specifically, the connecting portion 23 is formed as the second projecting portion 24a. In this embodiment, the 2nd protrusion part 24a becomes a shape which reduced gradually the length measured along the radial direction from the central axis O toward the vertex of the 2nd protrusion part 24a from the ring part 22. As shown in FIG.

  Further, as shown in FIG. 5, the first projecting portions 32 a are arranged at different positions in the axial direction with respect to the second projecting portions 24 a. In this embodiment, in the connection part 23, the 2nd protrusion part 24a is formed in the center in the axial direction by one. And the two 1st protrusion parts 32a located in the same side in the circumferential direction are arrange | positioned at the axial direction outer side with respect to the 2nd protrusion part 24a. Therefore, the 2nd protrusion part 24a is arrange | positioned between the two 1st protrusion parts 32a.

  In this embodiment, as shown in FIG. 5, the liquid chamber 5 does not exist between the first protrusion 32a and the second protrusion 24a, and the elastic body 4 exists. Moreover, in this embodiment, although the 1st protrusion part 32a and the 2nd protrusion part 24a have overlapped with the axial direction about the 1st protrusion part 32a and the 2nd protrusion part 24a, 1st protrusion part 32a, 2nd The axial overlap of the protrusions 24a can be arbitrary, and by changing these overlaps, the spring ratio of the vibration isolator can be adjusted, or the thickness of the elastic body 4 can be changed depending on the degree of overlap. Therefore, durability can be adjusted.

  As described above, in the second embodiment, as shown in FIGS. 4 and 5, the second protrusion is not formed in the orifice part 24, and the second protrusion 24 a is formed in the connection part 23 of the outer mounting member 2. Therefore, regardless of the presence or absence of the orifice portion 24, axial displacement between the inner mounting member 3 and the outer mounting member 2 can be suppressed by the first projecting portion 32a and the second projecting portion 24a.

  As mentioned above, although embodiment of this invention was described with reference to drawings, the vibration isolator of this invention is not limited to said example, A change can be added suitably. Specifically, for example, in the above-described embodiment, two connection grooves are provided in the orifice part that defines the liquid chamber, but the structure of the orifice part can be made arbitrary, The presence / absence of the chambers, the number and shape of the chambers and the like can be arbitrarily set (that is, it is not essential to provide the liquid chamber in the present invention, and the present invention is applied to a vibration isolator without the liquid chamber You may). Further, in the above-described embodiment, one communication groove is provided in one elastic body among the elastic bodies between the liquid chambers in order to communicate the insides of the liquid chambers. It can also be provided. In the above embodiment, one or both of the first protrusion and the second protrusion can be extended in the circumferential direction.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration isolator which can be manufactured with a simple method which controlled the spring ratio of the direction different from the input direction of main vibration can be provided.

1: anti-vibration device 2: external mounting member 21: outer cylinder 22: ring part 23: connection part 23a: intermediate part 23b: side part 24: orifice part 24a: second projecting part 24b 24c: connection groove, 3: inner mounting member, 31: rigid member, 31a: protruding portion, 31b: corner portion, 31c: mounting hole, 31d: recessed portion, 31e: inclined portion, 31f: bottom portion, 31g: recessed portion, 32: interior member, 32a: first projecting part, 32b: main body part, 32c: overhang part, 4: elastic body, 41: liquid chamber concave part, 41a: convex part, 42: communication groove, 5: liquid chamber, O : Center axis

Claims (8)

An outer mounting member coupled to one of the vibration generating unit and the vibration receiving unit, and an inner mounting member coupled to the other;
An elastic body connecting the outer mounting member and the inner mounting member;
With
The outer mounting member is formed in a cylindrical shape,
The inner mounting member includes a rigid member disposed in the outer mounting member, and a synthetic member positioned in the outer mounting member and fixed to the rigid member in an axial direction along a central axis of the outer mounting member. An interior member made of a resin material,
The interior member is formed with a first projecting portion projecting outward in the radial direction perpendicular to the axial direction, and the outer mounting member is second projecting toward the inner side in the radial direction. A protrusion is formed,
The first projecting portion and the second projecting portion are arranged such that circumferential positions along the central axis of the outer mounting member coincide with each other and the axial positions are different from each other. An anti-vibration device.   The vibration isolator according to claim 1, wherein the rigid member is formed in a plate shape.   The vibration isolator according to claim 1 or 2, wherein the interior member covers the rigid member over the entire circumference.   Of the rigid member, a concave portion recessed in the radial direction is formed in a portion located in the outer mounting member, the synthetic resin material enters the concave portion, and the interior member is fixed. The vibration isolator according to any one of claims 1 to 3.   The vibration isolator according to claim 4, wherein the recess is formed on a surface of the rigid member. Of the rigid member, at least in a portion located in the outer mounting member, provided with a recessed portion formed so as to narrow the width of the rigid member,
The vibration isolator according to any one of claims 1 to 5, wherein the interior member is fixed inside the hollow portion.   The vibration isolator according to any one of claims 1 to 6, wherein the first protrusion and the second protrusion are opposed to each other in the axial direction.   One of the first protrusion and the second protrusion is formed with two gaps in the axial direction, and the other is disposed between them. Item 8. The vibration isolator according to any one of items 1 to 7.

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