JP6479395B2 - Vibration control device - Google Patents

Description

  The present invention relates to a vibration control device which is applied to, for example, an automobile, an industrial machine, etc., and absorbs and attenuates vibration of a vibration generating unit such as an engine.

Conventionally, an outer mounting member connected to one of the vibration generating portion and the vibration receiving portion, an inner mounting member connected to the other, and an elastic body connecting the outer mounting member and the inner mounting member There is known an antivibration device provided.
For example, as shown in the following Patent Document 1, as an anti-vibration device of this type, an inner mounting member, a vibration generating portion, and a fastening member are inserted into the inner mounting member in the radial direction orthogonal to the axial direction of the outer mounting member. And the other of the vibration receiving parts are known.

Japanese Patent Application Publication No. 7-280014

  However, in the conventional vibration damping device, the portion of the inner attachment member into which the fastening member is inserted is formed separately by crushing the cylinder or the rod in the radial direction to be flat, or having a flat portion on the cylinder. There is a problem that it is difficult to manufacture such as fitting the

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a low-cost vibration isolation device that can be easily manufactured.

In order to solve the above problems, the present invention proposes the following means.
The vibration damping device according to the present invention comprises an outer mounting member connected to one of the vibration generating portion and the vibration receiving portion, an inner mounting member connected to the other, the outer mounting member, and the inner mounting member. The outer attachment member is formed in a tubular shape, and the inner attachment member is a plate-like rigid member disposed in the outer attachment member, and the outer attachment member is provided in the outer attachment member. An interior member made of a synthetic resin material positioned and fixed to the rigid member, in the rigid member, a projecting portion which protrudes outward in the axial direction along the central axis from the outer attachment member; A mounting hole is formed which is open in a radial direction orthogonal to the axial direction and into which a fastening member for connecting the projecting portion and the other of the vibration generating portion and the vibration receiving portion is inserted. home, In a portion located in the outer mounting member, a hollow portion formed to narrow the width of the rigid member, and the interior member is a cylindrical main body formed in a portion corresponding to the bottom surface of the hollow portion The elastic body is connected to the outer peripheral surface of the main body portion, and the elastic body has a liquid chamber concave portion which is recessed inward in the radial direction to define a liquid chamber filled with the liquid. A plurality of the main body portions are formed at intervals in the circumferential direction, and the main body portion is formed on both sides in the width direction of the rigid member with respect to the central axis, and has a pair of projecting portions projecting outward in the radial direction. The liquid chamber concave portion and the projecting portion are formed at positions corresponding to each other in the circumferential direction .

  According to the present invention, since the rigid member is formed in a plate shape, it is not necessary to crush and deform, for example, the cylindrical body or the rod in the radial direction, and the rigid member can be easily formed. Thereby, the vibration isolation device in which the projecting portion and the other of the vibration generating portion and the vibration receiving portion are connected is manufactured at low cost by inserting the fastening member into the mounting hole opening in the radial direction. Can. Therefore, it is possible to provide a low-cost vibration isolation device that can be easily manufactured.

  Further, the interior member may cover the rigid member over the entire circumferential direction along the periphery of the central axis of the outer attachment member.

  In this case, since the interior member covers the rigid member over the entire circumferential direction, the interior member can be firmly fixed to the rigid member.

  Moreover, the recessed part dented in the said radial direction may be formed in the part located in the said outer side attachment member among the said rigid members, the said synthetic resin material entraps in the said recessed part, and the said interior member may be adhered.

  In this case, since the synthetic resin material enters the recess of the rigid member and the interior member is fixed, the interior member can be firmly and surely fixed to the rigid member.

  The mounting hole and the recess may be formed on the surface of the rigid member.

  In this case, since the mounting hole and the recess are formed on the surface of the rigid member, the rigid member can be easily manufactured, for example, by a press or the like.

Moreover, the interior member inside the front Symbol recess may be secured.

In this case, since the hollow portion formed to narrow the width of the rigid member is provided, the weight of the rigid member can be reduced. In addition, since the interior member is fixed inside the recessed portion, the interior member is firmly fixed to the rigid member while preventing movement of the interior member along the axial direction by the interior member entering the recessed portion. Can .

  According to the present invention, it is possible to provide a low-cost vibration isolation device that can be easily manufactured.

It is a longitudinal cross-sectional view of the vibration isolator which concerns on embodiment of this invention. FIG. 7 is a perspective view of the inner attachment member.

Hereinafter, with reference to the drawings, a vibration control apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the vibration control device 1 of this embodiment is disposed, for example, at a connecting portion between a trailing arm (vibration generating portion) of a torsion beam type rear suspension and a vehicle body (vibration receiving portion).
The vibration damping device 1 comprises an outer mounting member 10 connected to one of a cylindrical vibration generating portion and a vibration receiving portion, an inner mounting member 20 connected to the other, an outer mounting member 10 and an inner mounting An outer mounting member 10 is disposed inside the outer shell 40, as well as an elastic body 30 that elastically connects the member 20.
In the illustrated example, the shell 40, the outer mounting member 10, the inner mounting member 20, and the elastic body 30 are disposed coaxially with the common shaft. Hereinafter, this common axis is referred to as a central axis O, and a direction along the central axis O is referred to as an axial direction, and a direction orthogonal to the central axis O in plan view seen from the axial direction is referred to as a radial direction. The circumferential direction is called the circumferential direction.
The outer shell 40 is formed in a cylindrical shape, for example, of a metal material. The outer mounting member 10 is press-fitted into the inner surface 41 of the outer shell 40.

  The outer mounting member 10 is formed of, for example, a metal material in a cylindrical shape extending in the axial direction, and is fixed to, for example, a trailing arm (not shown) serving as a vibration generating unit via an outer shell 40. The outer mounting member 10 is provided with a pair of ring portions 11 which are separately disposed at both axial end portions and extend over the entire circumference, and a connection portion (not shown) for connecting the pair of ring portions 11. The pair of ring portions 11 and the connection portion are integrally formed.

The inner attachment member 20 includes a plate-like rigid member 21 disposed in the outer attachment member 10, and an inner member 28 made of a synthetic resin material fixed in the outer attachment member 10 and fixed to the rigid member 21; Is equipped.
The rigid member 21 is formed of, for example, a metal material in a rectangular shape having a predetermined width in the radial direction and extending along the axial direction. The width of the rigid member 21 is narrower than the inner diameter of the outer mounting member 10. The axial length of the rigid member 21 is longer than the axial length of the outer mounting member 10.
Both end portions of the rigid member 21 are respectively projecting portions 22 and 23 which project outward in the axial direction from both end portions of the outer mounting member 10. The rigid member 21 is disposed in the outer mounting member 10 such that the projecting length of the one projecting portion 22 and the projecting length of the other projecting portion 23 are the same.

The one projecting portion 22 is chamfered at one corner to form an arc in plan view. The other projecting portion 23 is chamfered at both corners so that it has an arc shape in plan view.
Mounting holes 22 a and 23 a which are open in the radial direction of the rigid member 21 are formed in the projecting portions 22 and 23 respectively. The mounting holes 22 a and 23 a pass through the front and back surfaces of the rigid member 21.
The mounting hole 22a of the one projecting portion 22 has a circular shape having a center on the central axis O in a plan view. The mounting hole 23a of the other projecting portion 23 has an oblong shape having a major axis in a direction along the central axis O in plan view and having a minor axis in a direction orthogonal to the central axis O.
Fastening members (not shown) such as bolts are inserted into the mounting holes 22a and 23a. The inner mounting member 20 is connected to a vehicle body (not shown) which is a vibration receiving portion by a fastening member.

  The rigid member 21 is provided with a pair of indented portions 25 formed to narrow the width of the rigid member 21 at a position located inside the outer mounting member 10. The recessed portion 25 is formed by indenting the portions of the both side surfaces in the width direction of the rigid member 21 located in the outer mounting member 10. The recessed portion 25 has a bottom surface 25a extending in the axial direction, and a pair of inclined surfaces 25b and 25b provided so as to intersect the axial direction. The pair of inclined surfaces 25b, 25b are inclined such that the distance between them is gradually increased from the inner side to the outer side in the radial direction.

  In the rigid member 21, a plurality of recesses 26 are formed between the pair of recesses 25, which is a portion located inside the outer mounting member 10. The recess 26 is formed in a circular shape having a center on the central axis O in a plan view. Three recesses 26 are formed at equal intervals in the axial direction. The plurality of recesses 26 are formed on the surface of the rigid member 21 and are through holes penetrating the front and back surfaces of the rigid member 21.

  The interior member 28 is a portion located inside the outer mounting member 10 and is fixed to the rigid member 21 inside the recess 25. The inner member 28 is fixed to the rigid member 21 in a state in which the synthetic resin material is intruded into the recess 26 of the rigid member 21 by insert molding using the rigid member 21 as an insert, for example.

As shown in FIG. 2, the interior member 28 is formed in a cylindrical shape that covers the rigid member 21 over the entire area in the circumferential direction. The interior member 28 has a main body portion 28a formed in a portion corresponding to the bottom surface 25a (see FIG. 1) of the hollow portion 25 in the axial direction and a pair of inclined surfaces 25b (see FIG. 1) of the hollow portion 25 in the axial direction. And a pair of overhangs 28b, 28b formed in corresponding parts.
The overhanging portion 28 b is formed to have a diameter larger than that of the main body portion 28 a, and projects outward in the radial direction.
The main body portion 28a is provided with a pair of projecting portions 28c, 28c at an intermediate portion in the axial direction. The pair of projecting portions 28 c and 28 c are formed on both sides in the width direction of the rigid member 21 with the central axis O interposed therebetween, and protrude outward in the radial direction.

  As shown in FIG. 1, the elastic body 30 is formed of, for example, a rubber material in a cylindrical shape, and the inner peripheral surface thereof is fixed to the outer peripheral surface of the main body portion 28 a of the interior member 28. The elastic body 30 is bonded by, for example, vulcanization to the outer peripheral surface of the interior member 28. Further, the outer mounting member 10 is embedded in the elastic body 30. Thereby, the elastic body 30 elastically connects the outer attachment member 10 and the inner attachment member 20.

In the elastic body 30, a plurality of liquid chamber concave portions 32 which define hollow liquid chambers inward in the radial direction are formed at intervals in the circumferential direction. The two liquid chamber concave portions 32 are formed in the elastic body 30, and are separately disposed on both sides of the central axis O in the radial direction, respectively, at positions corresponding to the projecting portions 28c of the interior member 28. The two liquid chamber recesses 32 have the same shape and the same size, and have a rectangular shape that is long in the circumferential direction in a side view of the elastic body 30 viewed from the outer side in the radial direction.
The elastic body 30 may be press-fit into the outer mounting member 10. In this case, the elastic body 30 may be supported in the axial direction by bending both axial end portions of the outer mounting member 10 radially inward.

In the liquid chamber recess 32, a protrusion 33 is formed at a position corresponding to the protrusion 28 c of the interior member 28. The convex portion 33 protrudes outward in the radial direction.
A communication groove (not shown) for communicating the insides of the two liquid chamber recesses 32 is formed on the outer peripheral surface of the elastic body 30 in the region between the two liquid chamber recesses 32.

A covering member 36 formed of a material harder than the material forming the elastic body 30 is separately fitted to each liquid chamber concave portion 32 so that the liquid chamber concave portion 32 is covered from the outside in the radial direction. A room has been defined.
The covering member 36 is formed of, for example, a synthetic resin material or the like. The covering member 36 is formed with a communication opening (not shown) which penetrates in the radial direction and opens to the liquid chamber, and two connection grooves 37a and 37b which are arranged at intervals in the axial direction. .
The two connection grooves 37a and 37b extend over the entire circumferential length of the covering member 36, respectively. The communication opening is formed in one of the inner surfaces of one of the two connection grooves 37a and 37b. The communication groove of the elastic body 30 is connected to one of the two circumferential end portions of the two connection grooves 37a and 37b where the communication opening is formed, The other end of the communication opening is not connected to the other end of the communication opening.

In the above configuration, the communication groove of the elastic body 30 and the connection grooves 37a and 37b of the covering member 36 are covered by the shell 40 from the outside in the radial direction, thereby connecting the fluid chambers adjacent in the circumferential direction to each other. Is defined. The orifice passage extends around the entire circumference of the elastic body 30 and the covering member 36, and connects the communication opening formed in the one covering member 36 and the communication opening formed in the other covering member 36. It is a passage of
Then, when vibration is input to the vibration isolation device 1, the elastic body 30 elastically deforms, and the internal volume of each liquid chamber fluctuates, so that the liquid in the liquid chamber flows through the orifice passage and liquid column resonance occurs. Vibrations are damped and absorbed by

  According to the vibration damping device 1 of the present embodiment, since the rigid member 21 is formed in a plate shape, there is no need to crush and deform, for example, the cylinder and the rod in the radial direction, and the rigid member 21 can be easily formed. It is possible to Thus, for example, by inserting the fastening member such as a bolt into the radially opening mounting holes 22a and 23a, the cost of the vibration isolation device 1 in which the projecting portions 22 and 23 and the vehicle body serving as the vibration receiving portion are connected is reduced. Can be manufactured. Therefore, it is possible to provide a low-cost vibration isolation device 1 that can be easily manufactured.

  In addition, since the interior member 28 covers the rigid member 21 over the entire area in the circumferential direction, the interior member 28 can be firmly fixed to the rigid member 21.

  Further, a recess 26 penetrating in the radial direction is formed in the portion of the rigid member 21 located inside the outer mounting member 10, and the synthetic resin material enters the recess 26 and the interior member 28 is fixed. The member 28 can be firmly and reliably fixed to the rigid member 21.

  Further, since the mounting holes 22a and 23a and the recess 26 are formed on the front surface of the rigid member 21 and penetrate the front and back surfaces, the rigid member 21 can be easily manufactured, for example, by a press or the like.

  Further, since the recess 25 formed to narrow the width of the rigid member 21 is provided, the weight of the rigid member 21 can be reduced. Further, since the interior member 28 is fixed to the inside of the recessed portion 25, the interior member 28 enters the recessed portion 25, thereby preventing the interior member 28 from moving along the axial direction, and making the interior member 28 a rigid member. On the other hand, it can be firmly fixed.

Further, since the interior member 28 is formed of a synthetic resin material, it becomes possible to insert-mold the rigid member 21 as an insert, and the vibration proofing device 1 can be reliably formed at low cost.
Furthermore, since the interior member 28 is formed of a synthetic resin material, when the projecting portion 28c is formed on the interior member 28 protruding in the radial direction, for example, the injection molding is performed without performing welding or mounting of another member. It is possible to form by this, and increase of the manufacturing cost can be suppressed certainly.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

In the above embodiment, the outer mounting member 10 is connected to the trailing arm of the torsion beam type rear suspension which is the vibration generating portion, and the inner mounting member 20 is connected to the vehicle body which is the vibration receiving portion. May be connected to the trailing arm of the torsion beam type rear suspension which is a vibration generating portion, and the outer mounting member 10 may be connected to the vehicle body which is a vibration receiving portion.
Further, the members to which the outer mounting member 10 and the inner mounting member 20 are connected are not limited to the above-described embodiment. That is, the application of the vibration damping device 1 according to the embodiment is not limited to the connection portion between the trailing arm (vibration generating portion) of the torsion beam type rear suspension and the vehicle body (vibration receiving portion). Therefore, the vibration control device 1 according to the embodiment can be applied to, for example, an engine mount of a vehicle, a mount of a generator mounted on a construction machine, a mount of a machine installed in a factory or the like.

  In the above-mentioned embodiment, although the vibration damping device 1 had each liquid chamber and orifice passage, it does not have to have each liquid chamber and orifice passage.

  In the above-described embodiment, the pair of projecting portions 22 and 23 is provided by the both end portions of the rigid member 21 protruding outward from the both end portions of the outer mounting member 10 in the axial direction. On the other hand, only one end of the rigid member 21 may protrude from the one end of the outer mounting member 10 to the outside in the axial direction, so that one projecting portion may be provided.

  In the above-described embodiment, in the portion of the rigid member 21 located in the outer mounting member 10, through holes penetrating the front and back surfaces of the rigid member 21 are formed as the concave portions 26 recessed in the radial direction. The recess 26 may not penetrate through the front and back of the rigid member 21.

  In addition, it is possible to replace the component in the above-mentioned embodiment with a well-known component suitably, in the range which does not deviate from the meaning of the present invention, and may combine the above-mentioned modification suitably.

DESCRIPTION OF SYMBOLS 1 Anti-vibration device 10 Outer mounting member 20 Inner mounting member 21 Rigid members 22, 23 Protruding portions 22a, 23a Mounting hole 25 Recessed portion 26 Recess 28 Inner member 30 Elastic body O Central axis

Claims (5)

An outer mounting member connected to one of the vibration generating portion and the vibration receiving portion, and an inner mounting member connected to the other;
An elastic body connecting the outer attachment member and the inner attachment member;
Equipped with
The outer attachment member is formed in a tubular shape,
The inner attachment member is a plate-like rigid member disposed in the outer attachment member, and an interior member made of a synthetic resin material located in the outer attachment member and fixed to the rigid member.
Equipped with
Among the rigid members, a projecting portion that protrudes outward in the axial direction along the central axis from the outer mounting member is opened in the radial direction orthogonal to the axial direction, and the projecting portion, the vibration generating portion, and There is formed a mounting hole into which a fastening member connecting the other of the vibration receiving parts is inserted,
A portion of the rigid member located in the outer attachment member is provided with a recess formed to narrow the width of the rigid member,
The interior member includes a cylindrical main body portion formed in a portion corresponding to the bottom surface of the recessed portion, and an elastic body is connected to the outer peripheral surface of the main body portion .
In the elastic body, a plurality of liquid chamber concave portions which are recessed toward the inner side in the radial direction to define a liquid chamber filled with a liquid are formed at intervals in the circumferential direction.
The main body portion is formed on both sides in the width direction of the rigid member with respect to the central axis, and has a pair of projecting portions that protrude outward in the radial direction,
The vibration control device characterized in that the liquid chamber concave portion and the projecting portion are formed at corresponding positions in a circumferential direction .   The anti-vibration device according to claim 1, wherein the interior member covers the rigid member over the entire circumferential direction along the periphery of the central axis of the outer attachment member.   The radially recessed portion is formed in a portion of the rigid member located inside the outer mounting member, and the synthetic resin material is inserted into the recessed portion, and the interior member is fixed. The vibration control device according to claim 1.   The said mounting hole and the said recessed part are formed in the surface of the said rigid member, The anti-vibration apparatus of Claim 3 characterized by the above-mentioned.   The anti-vibration device according to any one of claims 1 to 4, wherein the interior member is fixed inside the recess.

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