JP5916572B2 - Vibration isolator with power generation means - Google Patents

Description

  The present invention relates to a vibration isolator which is interposed between a power unit of an automobile and a vehicle body or between a bridge girder and a bridge pier, etc., and connects them in a vibration isolating manner, and in particular, a power generation means for converting energy of input vibration into electric power. It is related with the vibration isolator with an electric power generation means provided with.

  Conventionally, an anti-vibration device is known as an anti-vibration support body or an anti-vibration coupling body that is interposed between members constituting a vibration transmission system and anti-vibration-connects the members to each other. The vibration isolator includes a first attachment member attached to one member constituting the vibration transmission system and a second attachment member attached to the other member constituting the vibration transmission system by a main rubber elastic body. It has an elastically connected structure.

  By the way, recently, in order to respond to a high demand for energy saving, it has been proposed to convert the vibration energy input to the vibration isolator into electric power for use. That is, as described in Japanese Patent Application Laid-Open No. 2008-202253 (Patent Document 1), by providing power generation means that generates electric power based on electromagnetic induction or the like, a part of input vibration energy is reduced. It is converted into electricity and used. As the power generation means, a structure using a relative displacement of the permanent magnet with respect to the coil as described in Patent Document 1 is also conceivable. For example, it is disclosed in Japanese Patent No. 4905820 (Patent Document 2). Thus, a structure in which an induced electromotive force according to a change in the magnetic field is obtained using a magnetostrictive element that generates a change in the magnetic field according to the input strain has been studied. In Patent Document 2, it has been proposed to efficiently generate power by using deformation due to resonance of the magnetostrictive element. However, in an automobile, a bridge, or the like, the vibration state may be adversely affected. It is desirable that the vibration transmission system is arranged so as to straddle between the members constituting the vibration transmission system so that the deformation and the accompanying power generation are caused by the relative displacement of the members constituting the vibration transmission system.

  However, if the power generation means is provided for the vibration isolator interposed between the members constituting the vibration transmission system and the power generation means is disposed across the members constituting the vibration transmission system, the large amplitude There is a possibility that the power generation means may be damaged due to excessive deformation when the vibration is input. In addition, in order to prevent excessive deformation of the power generation means, it is feared that suppressing the relative displacement amount between the members constituting the vibration transmission system by hardening the spring of the vibration isolation device may adversely affect the vibration isolation performance. So it was not realistic.

JP 2008-202253 A Japanese Patent No. 4905820

  The present invention has been made in the background of the above-mentioned circumstances, and its solution problem is a novel structure capable of effectively generating power while achieving both excellent power generation efficiency and durability. An object of the present invention is to provide a vibration isolator with power generation means.

  That is, the first aspect of the present invention is the vibration isolator main body in which the first attachment member and the second attachment member attached to each one of the members constituting the vibration transmission system are elastically connected by the main rubber elastic body. On the other hand, in the vibration isolator with the power generation means provided with the power generation means that is deformed by the external force input between the first attachment member and the second attachment member, the first attachment member and the An intermediate member elastically supported by the main rubber elastic body is disposed between the second attachment members, and a connecting member for connecting the intermediate member to the second attachment member is provided. The power generation means is configured to include the connecting member, and is configured to generate electric power by deformation of the connecting member due to relative displacement between the second mounting member and the intermediate member.

  According to such a vibration isolator with a power generation means described in the first aspect, since the power generation means is provided so as to connect the intermediate member and the second mounting member, the maximum deformation amount of the power generation means. Is suppressed. Therefore, damage to the power generation means due to excessive deformation is less likely to occur, and durability is improved.

  In addition, the relative displacement between the intermediate member and the second mounting member is determined by the springs of the portion connecting the first mounting member and the intermediate member and the portion connecting the second mounting member and the intermediate portion in the main rubber elastic body. Since it can be easily set by adjusting the ratio, the maximum deformation amount of the power generation means can be adjusted appropriately. Therefore, it is possible to generate power with high efficiency while avoiding damage due to excessive deformation of the power generation means.

  According to a second aspect of the present invention, in the vibration isolator with the power generation means described in the first aspect, the power generation means has a bias magnetic field exerted on the connection member formed of a magnetostrictive material, The coupling member has a structure in which a coil is wound, and an induced electromotive force is generated in the coil by a change in a magnetic field due to deformation of the coupling member.

  According to the second aspect, the coupling member formed of the magnetostrictive material is deformed by the relative displacement between the second mounting member and the intermediate member at the time of vibration input, so that the magnetic flux passing through the coil is increased or decreased. Inductive electromotive force based on electromagnetic induction flows through. Even in the power generation means using such a magnetostrictive material, highly efficient power generation can be realized while preventing damage due to excessive deformation.

  According to a third aspect of the present invention, in the vibration isolator with power generation means described in the second aspect, a permanent magnet that applies a bias magnetic field is attached to the connecting member.

  According to the third aspect, since the bias magnetic field is constituted by the magnetic field generated by the permanent magnet, the structure can be simplified, and energy consumption such as energization to generate the magnetic field is not required.

  According to a fourth aspect of the present invention, in the vibration isolator with power generation means described in the third aspect, the attaching portion of the permanent magnet in the connecting member is the second attaching member and the intermediate member in the connecting member. The connecting portion to the member is removed.

  According to the fourth aspect, it is possible to prevent the permanent magnet from being cracked by a force for connecting and fixing the connecting member, the second mounting member, and the intermediate member, and the connecting member, the second mounting member, and the intermediate member. Can be coupled with a sufficiently large force, and the coupling state of the coupling member, the second mounting member, and the intermediate member is stably maintained even when the vibration input is repeated.

  According to a fifth aspect of the present invention, in the vibration isolator with power generation means described in any one of the first to fourth aspects, the vibration isolator body has an elastic deformation amount of the main rubber elastic body. Stopper means for limiting is provided.

  According to the fifth aspect, since the maximum elastic deformation amount of the main rubber elastic body is defined by the stopper means, the relative displacement amount between the second mounting member elastically connected by the main rubber elastic body and the intermediate member is the stopper. The maximum deformation amount of the connecting member constituting the power generation means is limited by the means. Therefore, excessive deformation of the connecting member is effectively prevented, and durability is ensured more advantageously.

  According to a sixth aspect of the present invention, in the vibration isolator with power generation means described in any one of the first to fifth aspects, the main rubber elastic body includes the first attachment member and the intermediate member. A first elastic body that is elastically connected; a second elastic body that elastically connects the second mounting member and the intermediate member; and a spring constant of the first elastic body is the second elastic body. This is smaller than the spring constant of the elastic body.

  According to the sixth aspect, since the elastic deformation of the main rubber elastic body mainly occurs in the first elastic body connecting the first mounting member and the intermediate member at the time of vibration input, The relative displacement amount between the second attachment member and the intermediate member is smaller than the relative displacement amount between the first attachment member and the intermediate member. Therefore, the influence of the spring component of the connecting member on the spring characteristics of the vibration isolator is reduced, and the desired vibration isolating performance can be obtained easily and effectively.

  According to the present invention, the power generating means for generating electric power by deformation of the connecting member is attached to the mount body, and the connecting member is provided to connect the second attaching member and the intermediate member. Therefore, depending on the assumed input and the amount of elastic deformation of the main rubber elastic body, the spring of the portion connecting the first mounting member and the intermediate member in the main rubber elastic body, the second mounting member, and the intermediate member The maximum deformation amount of the connecting member can be controlled by adjusting the ratio of the portion connecting the spring and the spring. Therefore, it is possible to prevent damage (plastic deformation) due to excessive deformation of the connecting member while causing large deformation of the connecting member within an elastically acceptable range, and achieve both high power generation efficiency and excellent durability. Can be realized.

1 is a longitudinal sectional view showing an engine mount as a first embodiment of the present invention. The longitudinal cross-sectional view which shows the engine mount as the 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an engine mount 10 for an automobile as a first embodiment of a vibration isolator with power generation means having a structure according to the present invention. The engine mount 10 includes a mount main body 12 as a vibration isolator main body and a power generation means 14. The mount main body 12 is elastically connected to the first attachment member 16 and the second attachment member 18 by a main rubber elastic body 20. Has a structured. The first attachment member 16 is attached to a power unit (not shown), and the second attachment member 18 is attached to a vehicle body (not shown), so that the power unit is supported in a vibration-proof manner by the vehicle body. In the following description, the vertical direction refers to the vertical direction in FIG. 1, which is the main vibration input direction.

  More specifically, the first mounting member 16 is a high-rigidity member having a plate shape as a whole, and includes a first fixing portion 22 having a substantially disk shape. A mounting bolt 24 that protrudes upward is integrally formed at the center of the portion 22. Further, the first mounting member 16 includes a stopper portion 26 that is integrally formed with the first fixing portion 22. The stopper portion 26 is provided so as to protrude from the first fixing portion 22 to the outer peripheral side, and includes a contact portion 28 that extends downward and further extends from the lowermost end to the outer peripheral side.

  The second mounting member 18 is a high-rigidity member that is plate-shaped as a whole, and includes a substantially disk-shaped second fixing portion 30 and a lower portion from the center of the second fixing portion 30. A mounting bolt 31 protrudes toward the end. In addition, a flat contact portion 32 is integrally formed and extended on one side (right side in FIG. 1) in one radial direction of the second fixing portion 30, and the second fixing portion 30. A stepped plate-shaped support portion 34 is integrally formed and extends on the other side (left side in FIG. 1) in one radial direction of the portion 30. A projecting distal end portion of the support portion 34 in the radial direction is a first fixing portion 36 positioned above the base end portion, and the first fixing portion 36 has a connecting bolt hole penetrating vertically. Is formed.

  The first mounting member 16 and the second mounting member 18 are disposed so that the first fixing portion 22 and the second fixing portion 30 face each other at a predetermined distance in the vertical direction. The bodies 20 are elastically connected to each other. The main rubber elastic body 20 has a substantially cylindrical shape as a whole, and its upper surface is vulcanized and bonded to the first fixing portion 22 of the first mounting member 16 and its lower surface is the second mounting member 18. The second fixing part 30 is vulcanized and bonded.

  Further, the abutting portion 28 of the stopper portion 26 of the first mounting member 16 is disposed so as to face the abutted portion 32 of the second mounting member 18 with a predetermined distance therebetween, and contacted. A stopper rubber 38 formed integrally with the main rubber elastic body 20 is vulcanized and bonded to the lower surface of the portion 28. Thus, the maximum relative displacement amount in the vertical direction of the first mounting member 16 and the second mounting member 18 is defined by the contact between the contact portion 28 and the contacted portion 32 via the stopper rubber 38. Thus, stopper means 40 for limiting the amount of elastic deformation of the main rubber elastic body 20 is configured.

  An intermediate member 42 is fixed to the main rubber elastic body 20. The intermediate member 42 is a high-rigidity member having a substantially disk shape, and a second fixing portion 44 that protrudes outward in one radial direction is integrally formed. A connecting bolt hole penetrating vertically is formed. The intermediate member 42 is disposed between the opposing surfaces of the first mounting member 16 and the second mounting member 18 and extends substantially parallel to the first mounting member 16 and the second mounting member 18. The rubber elastic body 20 is vulcanized and bonded to an intermediate portion in the axial direction.

Thereby, the main rubber elastic body 20 is divided into two parts up and down across the intermediate member 42, and a first elastic body 46 that elastically connects the first mounting member 16 and the intermediate member 42 above the intermediate member 42. A second elastic body 48 that elastically connects the second mounting member 18 and the intermediate member 42 is provided below the intermediate member 42. In the engine mount 10 of the present embodiment, the first elastic body 46 and the second elastic body 48 have substantially the same cross-sectional shape and are formed of the same rubber material. By making the body 46 thicker than the second elastic body 48, the spring constant: k ₁ of the _first elastic body 46 is made smaller than the spring constant: k ₂ of the second elastic body 48. (K ₁ <k ₂ ). In the present embodiment, the first elastic body 46 and the second elastic body 48 are integrally formed, for example, by providing a communication hole (not shown) in the intermediate member 42. The elastic bodies 46 and 48 may be formed separately from each other.

  A power generation means 14 is attached to the mount body 12 having such a structure. The power generation means 14 includes a magnetostrictive element 50 as a connecting member, and generates electricity when the magnetostrictive element 50 is deformed by an external force input between the first mounting member 16 and the second mounting member 18. It is like that.

  The magnetostrictive element 50 is made of a magnetostrictive material that exhibits a demagnetism effect that produces a change in magnetic field in accordance with deformation, and is a long plate or rod-like member, with connecting bolt holes 52 penetrating at both ends. The mounting bolt holes 54 are formed through the connecting bolt holes 52 at a predetermined distance from each other. The material for forming the magnetostrictive element 50 is not particularly limited. For example, an iron-gallium alloy, an iron-cobalt alloy, an iron-nickel alloy, a terbium-dysprosium-iron alloy, or the like is preferably used. Can be done.

  Further, a permanent magnet 56 is attached to the magnetostrictive element 50. The permanent magnet 56 is an annular or cylindrical member made of ferrite or the like, and is magnetized in the axial direction. Two permanent magnets 56 and 56 are overlapped around one mounting bolt hole 54 of the magnetostrictive element 50 and fixed to the magnetostrictive element 50 by mounting bolts and nuts, respectively. A bias magnetic field based on the magnetic flux is constantly applied to the magnetostrictive element 50. As is clear from the mounting structure described above, in the present embodiment, the mounting bolt holes 54 and 54 and their periphery are the mounting portions of the permanent magnet 56 in the magnetostrictive element 50. As a means for applying a bias magnetic field to the magnetostrictive element 50, an electromagnet may be attached in place of or in addition to the permanent magnet 56, or a coil for forming a bias magnetic field is wound around the magnetostrictive element 50 so that the coil is energized. Thus, a predetermined bias magnetic field can be applied to the magnetostrictive element 50.

  Furthermore, a coil 58 is wound around the magnetostrictive element 50. The coil 58 is a general one formed by winding a metal wire, and is wound and disposed between a pair of mounting bolt holes 54 and 54 in the magnetostrictive element 50. Note that both ends of the coil 58 are electrically connected to power storage means such as a capacitor (not shown).

  The power generation means 14 having such a structure is attached to the mount body 12. That is, one end in the longitudinal direction of the magnetostrictive element 50 is overlapped with the first fixing portion 36 of the second mounting member 18, and the other end in the longitudinal direction of the magnetostrictive element 50 is the second end of the intermediate member 42. The both ends of the magnetostrictive element 50 are fixed to one of the second mounting member 18 and the intermediate member 42 by connecting bolts and nuts. Thus, the second mounting member 18 and the intermediate member 42 are connected by the magnetostrictive element 50, and the power generation means 14 is provided across the second mounting member 18 and the intermediate member 42. As is clear from the above-described connection structure, in this embodiment, the connection bolt holes 52 and 52 and their surroundings are connected to the second attachment member 18 and the intermediate member 42 of the magnetostrictive element 50. The attachment part of the permanent magnet 56 is provided off the connection part.

The engine mount 10 provided with such power generation means 14 has the first attachment member 16 attached to the power unit and the second attachment member 18 attached to the vehicle body, whereby the mount body 12 attaches the power unit to the vehicle body. Against vibration. In this embodiment, since the spring constant: k ₁ of the _first elastic body 46 is smaller than the spring constant: k ₂ of the second elastic body 48, the elastic deformation amount of the first elastic body 46: ΔL ₁ is larger than the elastic deformation amount ΔL _{2 of} the second elastic body 48.

  When the engine mount 10 is mounted on the vehicle and the vibration such as the engine shake is input between the first mounting member 16 and the second mounting member 18 in the vertical direction, the main rubber elastic body 20 is elastically deformed. As a result, an anti-vibration effect based on an energy damping action or the like due to internal friction of the main rubber elastic body 20 is exhibited.

  Further, when the first mounting member 16 and the second mounting member 18 are relatively displaced up and down and the main rubber elastic body 20 is elastically deformed, the intermediate member 42 is relatively displaced with respect to the second mounting member 18. The magnetostrictive element 50 connecting the second mounting member 18 and the intermediate member 42 is elastically deformed. As a result, a change in magnetic flux occurs in the magnetic circuit constituted by the magnetostrictive element 50 and the second mounting member 18, and an induced electromotive force is generated in the coil 58 wound around the magnetostrictive element 50. Then, the induced electromotive force generated in the power storage means connected to both ends of the coil 58 is accumulated, and is distributed and consumed by electrical components as necessary.

  In the engine mount 10, since the magnetostrictive element 50 is fixed to the intermediate member 42, the amount of deformation of the magnetostrictive element 50 can be reduced by adjusting the spring ratio of the first and second elastic bodies 46 and 48. It is possible to set appropriately.

That is, when a case in which an external force F in the vertical direction is input between the first mounting member 16 and the second mounting member 18 and the main rubber elastic body 20 is elastically deformed up and down by ΔL is considered, An external force F acts on each of the elastic body 46 and the second elastic body 48, and [Equation 1] and [Equation 2] are established from Hooke's law. Note that ΔL ₁ in the equation is the amount of elastic deformation of the first elastic body 46, and ΔL ₂ is the amount of elastic deformation of the second elastic body 48.

The elastic deformation of the first elastic body 46: a [Delta] L _1, the amount of elastic deformation of the second elastic body 48: the sum of [Delta] L ₂ is, the amount of elastic deformation of the main rubber elastic body 20: from becoming [Delta] L The following formula is established.

These [Number 1] to [Equation 3] Three formulas elastic deformation of the first elastic body 46: a [Delta] L _1, the amount of elastic deformation of the second elastic body 48: Solving respectively, for [Delta] L _2, the following [Formula 4], [Formula 5]

[Expression 4], the Equation 5, the amount of elastic deformation of the first elastic body 46: [Delta] L ₁ and the amount of elastic deformation of the second elastic body 48: [Delta] L ₂ is the spring constant of the first elastic member 46 : Is set according to the ratio between k ₁ and the spring constant of the second elastic body 48: k ₂ . Therefore, it is possible to adjust the elastic deformation amount ΔL ₂ of the second elastic body 48 by adjusting the ratio of the spring constants of the first and second elastic bodies 46, 48. The deformation amount of the magnetostrictive element 50 determined according to the elastic deformation amount ΔL ₂ of the elastic body 48 can be easily set at the design stage. Therefore, by adjusting the maximum deformation amount of the magnetostrictive element 50, electric power can be obtained with excellent power generation efficiency while preventing the plastic breakdown of the magnetostrictive element 50 and ensuring durability. Moreover, even if the spring ratios of the first and second elastic bodies 46 and 48 are changed and set, the spring characteristics of the main rubber elastic body 20 as a whole are substantially maintained, so that adverse effects on the vibration isolation performance can be suppressed.

  In addition, in the engine mount 10 of the present embodiment, the mount body 12 is provided with stopper means 40 that limits the amount of elastic deformation of the main rubber elastic body 20. Thereby, since the maximum deformation amount of the magnetostrictive element 50 is set by the stopper action of the stopper means 40, excessive deformation of the magnetostrictive element 50 is prevented even when a shocking heavy load is input, and the durability of the magnetostrictive element 50 is improved. Sex is secured.

Further, the spring constant: k ₁ of the _first elastic body 46 is made smaller than the spring constant: k ₂ of the second elastic body 48, and the anti-vibration effect is exhibited mainly by the elastic deformation of the first elastic body 46. As a result, the influence on the spring characteristics of the mount body 12 due to the connection between the intermediate member 42 and the second mounting member 18 by the magnetostrictive element 50 can be suppressed, and the desired vibration-proof performance can be easily obtained. it can.

  In the present embodiment, the permanent magnet 56 that applies a bias magnetic field to the magnetostrictive element 50 in order to realize stable power generation is connected to the second mounting member 18 and the intermediate member 42 with respect to the magnetostrictive element 50 ( The connecting bolt hole 52 and its surroundings are attached inward in the longitudinal direction. Thus, by providing the attachment structure of the permanent magnet 56 to the magnetostrictive element 50 separately from the connection structure of the magnetostrictive element 50 to the second attachment member 18 and the intermediate member 42, the magnetostrictive element 50 is attached to the second attachment member 18 and the intermediate member 42. When attaching to the member 18 and the intermediate member 42, problems such as cracking of the permanent magnet 56 and dropout of the magnetostrictive element 50 due to insufficient bolt tightening are avoided.

  FIG. 2 shows an engine mount 60 for an automobile as a second embodiment of the vibration isolator with a generator having a structure according to the present invention. The engine mount 60 has a structure in which the power generation means 62 is attached to the mount body 12. In the following description, members and portions that are substantially the same as those in the first embodiment are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

  The power generation means 62 has a structure in which the piezoelectric elements 66 are fixed to both surfaces of a plate-like connecting member 64. The connecting member 64 is a plate-like member made of spring steel or the like, and is allowed to be elastically deformed in the vertical direction. Further, a pair of connecting bolt holes 52, 52 are formed at both ends of the connecting member 64 so as to penetrate vertically.

  In addition, piezoelectric elements 66 are fixed to the upper and lower surfaces of the connecting member 64. The piezoelectric element 66 is a film-like element that generates an electric charge by the action of an external force, and is formed of, for example, a single crystal such as quartz half-angle lithium niobate, or a polymer film such as ceramics or polyvinylidene fluoride. In this embodiment, the piezoelectric elements 66 are fixed to both the upper and lower surfaces of the connecting member 64. However, a structure in which the piezoelectric elements 66 are fixed to only the upper and lower surfaces of the connecting member 64 can also be employed. Further, although not clearly shown in the figure, the piezoelectric element 66 is electrically connected to a power storage means (not shown) so that electric power generated by the action of an external force is stored by the power storage means.

  The connecting member 64 is connected to the first fixing portion 36 and the intermediate member 42 of the second mounting member 18 by connecting bolts and nuts inserted into the connecting bolt holes 52 and 52 at both ends. The second fixing portion 44 is fixed. Thus, the second mounting member 18 and the intermediate member 42 are connected to each other by the connecting member 64, and the power generation means 62 is disposed across the second mounting member 18 and the intermediate member 42.

  Also in the engine mount 60 having such a structure, electric power is generated in the power generation means 62 when a vibration load is input. That is, since vibration is input between the first mounting member 16 and the second mounting member 18 and the second mounting member 18 and the intermediate member 42 are relatively displaced, the connecting member 64 is elastically deformed. . As the connecting member 64 is deformed, the piezoelectric element 66 fixed to the connecting member 64 is deformed and stress is applied to the piezoelectric element 66, so that electric power is generated in the piezoelectric element 66 and stored in the power storage means. . In the present embodiment, since the deformation of the connecting member 64 causes stress to act on both of the pair of piezoelectric elements 66 and 66 to generate electric power, more efficient power generation is realized.

  As described above, the power generation means is not limited to a power generation mechanism based on electromagnetic induction using a magnetostrictive material as long as it generates electric power by deformation of the connecting member that connects the second mounting member 18 and the intermediate member 42. As a power generation element constituting the power generation means, an electrostrictive element or the like can be used in addition to the magnetostrictive element and the piezoelectric element shown in the first and second embodiments.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the present invention can be applied to a cylindrical vibration isolator. Specifically, the inner shaft member as the first mounting member and the outer cylindrical member as the second mounting member are inserted and removed from the inside, and elastically connected by the cylindrical main body rubber elastic body. A cylindrical intermediate member extending in the circumferential direction between the inner shaft member and the outer cylindrical member is disposed and vulcanized and bonded to the main rubber elastic body. Furthermore, by providing a connecting member for connecting the outer cylindrical member and the intermediate member to constitute the power generation means, it is possible to realize a cylindrical vibration isolator with the power generation means having a structure according to the present invention. This also reduces the relative displacement amount between the outer cylindrical member and the intermediate member as compared with the relative displacement amount between the inner shaft member and the outer cylindrical member, so that the connection member is prevented from being damaged and has excellent durability. And power generation efficiency are realized at the same time.

  Moreover, although the said embodiment illustrated the structure where only one power generation means was provided, for example, a plurality of power generation means may be provided at different positions on the circumference. In this case, it is not always necessary that all the power generation means have the same structure. For example, the power generation means 14 of the first embodiment using a magnetostrictive element and the power generation means of the second embodiment using a piezoelectric element. 62 can be used in combination.

  In the embodiment, the spring ratio is adjusted by making the thicknesses of the first elastic body 46 and the second elastic body 48 constituting the main rubber elastic body 20 different from each other. By making the cross-sectional shapes of the elastic body and the second elastic body different, or by making the rubber materials forming the first elastic body and the second elastic body different, the first and second elastic bodies The spring ratio can also be adjusted.

Further, in the above embodiment, the spring constant: k ₁ of the _first elastic body 46 is smaller than the spring constant: k ₂ of the second elastic body 48, but the first and second elastic bodies 46, The magnitude relationship of the spring constant of 48 is not particularly limited.

  Further, the connecting member that connects the second mounting member 18 and the intermediate member 42 may extend in a direction perpendicular to the axis as in the above-described embodiment, but may be disposed so as to extend in the axial direction. It may be configured to be deformed with respect to a vibration input in the axial direction, or may be configured to be deformed with respect to a vibration input in a direction perpendicular to the axis.

  The present invention is not only applied to engine mounts, but can also be applied to body mounts, subframe mounts, differential mounts, suspension bushings, and the like. Furthermore, the scope of application of the present invention is not limited to vibration isolators used in automobiles, but is applicable to vibration isolators for various vehicles such as motorcycles, railway vehicles, industrial vehicles, bridge girder and bridge piers. The present invention can also be applied to a vibration isolator for a bridge interposed between buildings, a vibration isolator for a building interposed between a building foundation and a pillar, or the like.

10, 60: Engine mount (vibration isolation device with power generation means), 12: Mount main body (vibration isolation device main body), 14, 62: Power generation means, 16: First attachment member, 18: Second attachment member, 20 : Body rubber elastic body, 40: stopper means, 42: intermediate member, 46: first elastic body, 48: second elastic body, 50: magnetostrictive element (connection member), 56: permanent magnet, 58: coil, 64: Connecting member

Claims (6)

The first attachment member and the second attachment member attached to each one of the members constituting the vibration transmission system are elastically connected by the main rubber elastic body to the first attachment member and the second attachment member. In the vibration isolator with the power generation means provided with the power generation means for generating power by being deformed by the external force input between the two attachment members,
An intermediate member elastically supported by the main rubber elastic body is disposed between the first mounting member and the second mounting member,
A connecting member for connecting the intermediate member to the second mounting member is provided, and the power generation means includes the connecting member, and the connection is made by relative displacement between the second mounting member and the intermediate member. A vibration isolator with power generation means, wherein power is generated by deformation of a member.   The power generating means has a structure in which a bias magnetic field is exerted on the connecting member formed of a magnetostrictive material, and a coil is wound around the connecting member, and a change in magnetic field due to deformation of the connecting member. The vibration isolator with power generation means according to claim 1, wherein an induced electromotive force is generated in the coil.   The vibration isolator with power generation means according to claim 2, wherein a permanent magnet that applies a bias magnetic field is attached to the connecting member.   The vibration isolator with a power generation means according to claim 3, wherein an attachment portion of the permanent magnet in the connection member is provided so as to be disengaged from the connection portions of the connection member to the second attachment member and the intermediate member.   The vibration isolator with power generation means according to any one of claims 1 to 4, wherein the vibration isolator body is provided with stopper means for limiting an elastic deformation amount of the main rubber elastic body.   The main rubber elastic body includes a first elastic body that elastically connects the first mounting member and the intermediate member, and a second elastic body that elastically connects the second mounting member and the intermediate member. The vibration isolator with power generation means according to any one of claims 1 to 5, wherein a spring constant of the first elastic body is smaller than a spring constant of the second elastic body.

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