JP2011214701A - Vibration isolation support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a transmission suppression effect of vibration produced by an elastic member at the initial stage at which a load acts on the elastic member and when a small load acts thereon, to improve the isotropy of the vibration isolation performance of the elastic member, thereby improving the vibration isolation performance of the elastic member, in a vibration isolation support device having the elastic member which is arranged between a vehicle body and a fuel tank.SOLUTION: The vibration isolation support device includes the elastic member 20 which is arranged between the vehicle body 2 and the fuel tank 10, and the transmission of vibration between the vehicle body 2 and the fuel tank 10 is suppressed through the elastic deformation of the elastic member 20. The elastic member 20 is an annular body formed by connecting a plurality of spherical bodies 30 which are arranged in an annular shape with an axial line parallel to the vertical direction as a center, and has a plurality of spherical parts 31, 32 which are arranged in an annular shape. The plurality of spherical parts 31, 32 have substantially the same shapes, and contact with the vehicle body 2 and the fuel tank 10 respectively in the vertical direction.

Description

  The present invention relates to an anti-vibration support device that includes an elastic member that is disposed between a support member and a supported member that is supported by the support member and suppresses transmission of vibration between the support member and the supported member. The vibration isolating support device is provided, for example, in a vehicle, and the elastic member is disposed, for example, between a vehicle body and a fuel tank supported by the vehicle body.

  As an anti-vibration support device provided in a vehicle, an elastic member is provided between the vehicle body and the fuel tank so as to be opposed to the vehicle body and the fuel tank in the vertical direction, and the elastic member is provided between the vehicle body and the fuel tank. What suppresses transmission of vibration is known (see, for example, Patent Document 1).

JP 2006-7957 A

  In the vibration isolating support device including the elastic member arranged to face the vehicle body and the fuel tank in the vertical direction, the elastic member has a rectangular parallelepiped shape or the elastic member has a plurality of protrusions. Due to the shape and arrangement of the protrusions, the rigidity of the elastic member may be relatively different with respect to different directions (for example, the front-rear direction and the left-right direction) in the horizontal direction, which is the direction orthogonal to the vertical direction. . In such a case, when the load acting on the elastic member due to the vibration of the fuel tank or the vehicle body has a horizontal component other than the vertical direction, depending on the direction of the load in the horizontal direction, Variations in the vibration isolating performance of the elastic member occur, that is, the vibration isolating performance has directionality. And, if the vibration isolation performance of the elastic member is directional, the vibration isolation performance of the elastic member is reduced due to the decrease of the vibration isolation performance against the external force in a specific direction, and the effect of reducing vibration and noise is reduced. To do.

  Further, by facilitating the deformation of the elastic member in the initial stage due to the load, for example, when the load is small, by increasing the elastic deformation amount of the elastic member with respect to the change amount of the load compared to when the load is large, It is desirable to increase the effect of suppressing vibration transmission between the vehicle body and the fuel tank.

The present invention has been made in view of such circumstances, and in an anti-vibration support device including an elastic member disposed between a support member and a supported member, the initial stage when a load acts on the elastic member. To improve the vibration transmission suppression effect by the elastic member when a stage or a small load is applied, and to improve the isotropy of the vibration isolation performance of the elastic member, thereby improving the vibration isolation performance of the elastic member Objective.
Further, the present invention further provides a discharge of foreign matter that has entered between the elastic member and the supported member or the support member when the elastic member of the vibration isolating support device is used in an environment where the elastic member is exposed to foreign matters such as water. The purpose is to make it easier.

  The invention according to claim 1 is characterized in that the support member (2) and the supported member (2) and the supported member (10) supported by the support member (2) are opposed to each other in a facing direction. (10) includes an elastic member (20, 120, 220) disposed between the support member (2) and the supported member (10) by elastic deformation of the elastic member (20, 120, 220). In the anti-vibration support device in which the transmission of vibration between the elastic members (20, 120, 220) is suppressed, the elastic members (20, 120, 220) are arranged in a plurality of substantially annular shapes around an axis (L) parallel to the facing direction. The anti-vibration support device has spherical portions (31, 32) having the same shape, and each spherical portion (31, 32) contacts the support member (2) or the supported member (10) in the facing direction. It is.

According to this, since the elastic member contacts the supporting member or the supported member at a plurality of substantially identically-shaped spherical portions arranged in an annular shape, different directions (or different directions in the orthogonal direction orthogonal to the opposing direction (or The rigidity variation in the circumferential direction of the elastic member can be reduced, and the rigidity of the elastic member in different orthogonal directions (or circumferential directions) can be made uniform. And the uniformity of the rigidity in a different orthogonal direction improves, so that the number of spherical parts is increased.
Furthermore, since the shape of each spherical portion that is a contact portion with the supporting member or the supported member is spherical, each spherical portion itself has substantially uniform rigidity in an arbitrary direction of the orthogonal direction.
As a result, since the variation in the vibration isolating performance of the elastic member against the load in the orthogonal direction can be reduced, the isotropy of the vibration isolating performance is improved, and thus the vibration isolating performance of the elastic member is improved.
In addition, since the contact portion with the supporting member or the supported member is a spherical portion, the contact area with the supporting member or the supported member when the load is a small load and the initial stage of the action of the load on the elastic member is small. Since it is small, the spherical portion is easily elastically deformed, and further, since a gap is formed between the spherical portions adjacent in the circumferential direction, the spherical portion is more easily elastically deformed. As a result, the effect of suppressing the transmission of vibration between the supported member and the supporting member is improved when the load is in an initial stage and when the load is a small load.

The invention according to claim 2 is the anti-vibration support device according to claim 1, wherein the elastic member (20, 120) is such that the radially inner side of the spherical portion (31, 32) is the inner space (Si). And the outer side in the radial direction of the spherical parts (31, 32) is an annular body (So), and between the spherical parts (31, 31; 32, 32) in the circumferential direction, An annular groove (40) is formed.
According to this, since the annular groove is formed in the elastic member at intervals in the circumferential direction, the foreign matter that has entered the inner space can be easily discharged to the outer space through the annular groove, and the foreign matter from the inner space can be removed. Emission is improved.

The invention according to claim 3 is the anti-vibration support device according to claim 1 or 2, further comprising a holding band (50) for holding the supported member (10) with respect to the support member (2). The holding band (50) supports the supported member (10) in a state in which the spherical portions (31, 32) are in contact with the supporting member (2) or the supported member (10). The portions (31, 32) are arranged at positions overlapping the holding band (50) when viewed from the facing direction.
According to this, since the supported member is supported by the holding band with respect to the supporting member, the spherical portion of the elastic member is in contact with the supporting member or the supported member in the supported state of the supported member by the holding band. Therefore, the elastic member exhibits a transmission suppressing effect even with respect to minute vibrations between the supported member and the supporting member.

The invention according to claim 4 is the anti-vibration support device according to any one of claims 1 to 3, wherein the support member (2) is a vehicle body (2) of a vehicle, and the supported member ( 10) is a fuel tank (10) disposed below the vehicle body (2), and the facing direction is the vertical direction of the vehicle (2).
According to this, in the anti-vibration support device including the elastic member disposed between the vehicle body and the fuel tank, the operational effects corresponding to the inventions according to claims 1 to 3 are exhibited.

According to the present invention, in the anti-vibration support device including the elastic member disposed between the support member and the supported member, the elastic member at the initial stage when a load acts on the elastic member or when a small load acts It is possible to improve the vibration transmission suppressing effect of the elastic member and to improve the isotropy of the vibration isolating performance of the elastic member, thereby improving the vibration isolating performance of the elastic member.
Further, according to the present invention, when the elastic member of the vibration isolating support device is used in an environment where the elastic member is exposed to foreign matters such as water, the foreign matter has entered between the elastic member and the supported member or the supporting member. Can be easily discharged.

It is a perspective view of the fuel tank supported by the vibration proof support apparatus which is 1st Embodiment of this invention. It is sectional drawing in the II-II arrow of FIG. It is a perspective view of the elastic member with which the vibration proof support apparatus of FIG. 1 is provided. FIG. 2 is an upper plan view near an elastic member in FIG. 1. FIG. 3 is an enlarged view of the vicinity of an elastic member in FIG. 2. It is the VI-VI sectional view taken on the line of FIG. FIG. 5 shows a second embodiment of the present invention and corresponds to FIG. 4. It is the VIII-VIII sectional view taken on the line of FIG. FIG. 6 shows a third embodiment of the present invention and corresponds to FIG. 5. FIG. 6 shows a fourth embodiment of the present invention and corresponds to FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIGS. 1-6 is a figure explaining 1st Embodiment of this invention.
1 and 2, a vibration isolating support device 1 according to a first embodiment of the present invention is provided in a four-wheeled automobile that is a vehicle as a machine, and a fuel tank that is a vehicle component provided in the automobile. 10 vibrations are suppressed.
The automobile includes a vehicle body 2 as a support member that is a vehicle component, a fuel tank 10 that is disposed below the vehicle body 2 and supported by the vehicle body 2, and an elastic material having rubber-like elasticity ( For example, the anti-vibration support apparatus 1 provided with the elastic member 20 formed from rubber | gum or an elastomer) is provided. The fuel tank 10 is supported on the vehicle body 2 by the vibration isolation support device 1.

  The vehicle body 2 includes a floor panel 3 as a lower member of the vehicle body 2 and a cross member 4 which is a pair of reinforcing members which are coupled to the floor panel 3 and disposed in front of and behind the fuel tank 10 and extend in the left-right direction. , 5. In this embodiment, in the floor panel 3 and the fuel tank 10 that are disposed to face each other in the facing direction parallel to the vertical direction, the fuel tank 10 is disposed below the floor panel 3. Therefore, the anti-vibration support device 1 is used in an environment where the anti-vibration support device 1 is exposed to foreign matter such as water or dust, and the foreign matter is inserted between the elastic member 20 and the fuel tank 10 and the floor panel 3 to the inner space Si of the elastic member 20. May invade.

  In the embodiment, the top and bottom, front and rear, and left and right are based on an automobile. Further, the plan view means viewing from above and below, and when the upper direction is one of the opposite direction and the other direction, the lower is the other one direction and the other direction of the opposite direction. It is.

  A fuel tank 10 connected to an oil supply port (not shown) connected to an oil supply port and storing liquid fuel supplied through the oil supply pipe includes a tank body 11 which is a flat rectangular parallelepiped sealed container, and a tank body 11. And a support portion 15 (see also FIG. 5) for supporting the elastic member 20 on the fuel tank 10. Both the tank body 11 and the support portion 15 are made of synthetic resin.

  The tank body 11 has an upper wall 12 and a lower wall 13 that are substantially rectangular in plan view. A support flange 6 that closes an opening 14 provided in the upper wall 12 is detachably attached to an upper wall 12 that is an opposing wall facing the floor panel 3 in the vertical direction. Inside the fuel tank 10 is disposed a fuel pump 7 for supplying fuel through an fuel supply pipe 8 to an internal combustion engine as an engine provided in the automobile. The fuel pump 7 is supported by the support flange 6 via the stay 6a.

Referring to FIG. 5, the support portion 15 as a pedestal includes a disc-like placement portion 16 on which the elastic member 20 is placed, a body-side coupling of the tank body 11, and the support portion 15 provided integrally with the placement portion 16. A support portion side coupling portion 17 coupled to the portion 11a, and a holding portion 18 formed of a columnar protrusion that is inserted into the elastic member 20 and holds the elastic member 20, and the mounting portion 16 and the coupling portion 17 and the holding | maintenance part 18 are the single members integrally molded.
The support part side coupling part 17 constituted by the convex part formed with the split groove 17a for facilitating the elastic deformation is elastically deformed by the support part side coupling part 17 into the main body side coupling part 11a constituted by the concave part. It is detachably coupled by press-fitting as a coupling means using the elastic force of. As another example, the support portion 15 may be integrally formed with the tank body 11.

  The holding portion 18 disposed in the inner space Si (see FIGS. 3 and 4) of the elastic member 20 has, for example, a cylindrical shape, and a state in which a load for elastic deformation is not acting (hereinafter referred to as “natural state”). In a state in which a gap in the radial direction is formed with respect to the elastic member 20, or in a state in which the elastic member 20 is not elastically deformed or is slightly in contact with the elastic member 20. Placed.

  The anti-vibration support device 1 is composed of one or more, in this case, a plurality of four elastic members 20, and is arranged between the vehicle body 2 as an upper member and the fuel tank 10 as a lower member in the vertical direction. One or more holding members for holding the vibration member and the contact state of each elastic member 20 with respect to the floor panel 3 and the fuel tank 10 are arranged corresponding to the arrangement of the elastic member 20 in the left-right direction here. A plurality of holding bands 50 including at least two. The plurality of holding bands 50 are arranged side by side in the left-right direction.

Each of the metal and belt-like holding bands 50 includes the tank body 11 on the lower side opposite to the upper side on the vehicle body 2 side with respect to the fuel tank 10 in the vertical direction, and the upper wall 12 that is an upper member in the vertical direction. The lower wall 13, which is the lower member on the opposite side, is supported so as to press upward, and is also an attachment member for attaching the fuel tank 10 to the floor panel 3.
The holding band 50 sandwiches the tank body 11 between the floor panel 3 in the vertical direction, and is a bolt as a coupling tool at both ends 51 and 52 in a state of being stretched between the front and rear cross members 4 and 5. 53, each of the cross members 4 and 5, which is an attachment portion of the vehicle body 2, is fixed. For this reason, the fuel tank 10 is fixed in a state of being suspended below the vehicle body 2.
Hereinafter, the fuel tank 10 is supported on the vehicle body 2 by the anti-vibration support device 1 in a state where the upper contact portion 21 and the lower contact portion 22 of each elastic member 20 are in contact with the floor panel 3 and the placement portion 16, respectively. This state is referred to as a support state of the fuel tank 10.

  A plurality of upper walls 12 of the fuel tank 10 are separated in the front-rear direction as the first horizontal direction (the first orthogonal direction orthogonal to the opposing direction) in the horizontal direction that is orthogonal to the vertical direction. These two elastic members 20 are arranged and attached. Each of the front portion and the rear portion, which are the one-direction side portion and the other-side portion of the upper wall 12 in the front-rear direction, is a second horizontal direction orthogonal to the first horizontal direction (second orthogonal direction orthogonal to the opposing direction). .) Is provided with a plurality of two elastic members 20 spaced apart in the left-right direction. In this embodiment, four elastic members 20 having the same structure and substantially the same shape are provided at the four corners of the upper wall 12. One by one. The “shape” includes a shape and a size.

  In the present invention and embodiments, the modifier “almost” includes the case where there is no such modifier, and does not exactly match the case where there is no modifier “almost”, but there is no such modifier. It means to include a range that deviates to the extent that there is no significant difference in terms of action and effect compared to the case.

  Each elastic member 20 reduces the vibration of the fuel tank 10 due to the undulation of the fuel in the fuel tank 10 due to its elastic deformation, and therefore suppresses the vibration of the fuel tank 10 from being transmitted to the floor panel 3 of the vehicle body 2. In addition, the vibration of the vehicle body 2 is suppressed from being transmitted from the floor panel 3 to the fuel tank 10, and thus the vibration of the fuel tank 10 is reduced. For this reason, each elastic member 20 reduces vibration and noise caused by the vibration of the fuel tank 10.

  Referring to FIGS. 1 and 3 to 5, each elastic member disposed facing the floor panel 3 of the vehicle body 2 and the upper wall 12 of the fuel tank 10 in the facing direction (in this embodiment, the vertical direction). Reference numeral 20 denotes a plurality of a predetermined number of, in this case, nine, spherical bodies 30 as elastic elements having the same shape, which are arranged in an annular shape around the axis L, and are connected in a circumferentially arranged state. It is the annular | circular shaped annular body used as this member.

Each spherical body 30 includes an upper spherical portion 31 as a first spherical portion having an upper spherical surface 31a as a first spherical surface and a lower spherical portion as a second spherical portion having a lower spherical surface 32a as a second spherical surface. It has a side spherical portion 32 and an intermediate portion 33 between the upper spherical portion 31 and the lower spherical portion 32 in the axial direction. The upper spherical portion 31 and the lower spherical portion 32 are a first end portion and a second end portion in the axial direction of the spherical body 30, respectively.
Each upper spherical surface 31a and each lower spherical surface 32a have substantially the same shape, and therefore each upper spherical portion 31 and each lower spherical portion 32 have substantially the same shape.

  In the support state of the fuel tank 10, the axis L is parallel to the facing direction, and thus in this embodiment, parallel to the vertical direction, and the radially inner side of the elastic member 20 is the inner space Si, The outer side in the radial direction is the outer space So.

In the present invention and embodiment, in the elastic member 20 in the natural state, each spherical surface 31a, 32a that is a part of the surface of the spherical body 30 has a cross-section (hereinafter referred to as a plane) whose shape is orthogonal to the axis L. It can be approximated by a single circular arc or a circular arc having a plurality of different radii in a cross section in a plane including the axis L (hereinafter referred to as “longitudinal cross section”). It means a surface that has an arcuate shape. The straight line is an arc having an infinite radius.
Further, in relation to the elastic member 20, the direction parallel to the axis L is assumed to be the axis direction (in this embodiment, the vertical direction in the support state of the fuel tank 10), and the radial direction and the circumferential direction are Suppose that the radial direction and the circumferential direction are centered on the axis L.
In this embodiment, the basic shape of the spherical body 30 is a sphere having substantially the same distance (radius) from one point, and the spherical body 30 is constituted by a part of the sphere.

The elastic member 20 includes an upper contact portion 21 as a first annular contact portion that contacts the planar contact surface 3c (see FIG. 6) of the floor panel 3, and a planar shape of the placement portion 16 of the fuel tank 10. A lower contact portion 22 as an annular second contact portion that contacts the contact surface 16c (see FIG. 6), and an annular main body portion 23 between the upper contact portion 21 and the lower contact portion 22 in the axial direction. Have
In this embodiment, the main body 23 has a connecting portion 23a in which spherical bodies 30 and 30 adjacent in the circumferential direction are coupled to each other. The connecting portion 23 a is a portion where the sphere, which is the basic shape of the sphere 30, partially overlaps in the circumferential direction. The longitudinal section of the connecting portion 23a is substantially a circle, and the rigidity of the connecting portion 23a, and consequently the rigidity of the main body portion 23, is increased by the diameter of the circle being larger than the radius of the spherical body.

The upper contact portion 21 has a plurality of first predetermined number of upper spherical portions 31, and similarly, the lower contact portion 22 has a plurality of second predetermined number of lower spherical portions 32. The upper spherical portion 31 is a contact portion with the floor panel 3 of the vehicle body 2 in the upper contact portion 21, and the lower spherical portion 32 is a contact portion with the placement portion 16 of the fuel tank 10 in the lower contact portion 22. is there.
In this embodiment, the first and second predetermined numbers are the same number and equal to the predetermined number.
It is to be noted that the directionality of the vibration isolating performance of the elastic member 20 in the direction orthogonal to the axial direction is reduced and the isotropic property is improved, that is, the orthogonal direction (here, the horizontal direction and the circumference of the elastic member 20 is In order to increase the effect of improving the isotropy of the anti-vibration performance in the direction), it is preferable that the number of the spherical bodies 30 is larger, and the predetermined number and the first and second predetermined numbers are 6 or more. Preferably there is.

2, 5, and 6, in the support state of the fuel tank 10, each upper spherical surface 31 a contacts the floor panel 3 in the axial direction, and each lower spherical surface 32 a is fuel in the axial direction. It contacts the mounting portion 16 of the tank 10.
In the upper spherical portion 31, the area located above (or closer to the floor panel 3 or the vehicle body 2) is continuously reduced in cross-sectional area at the portion, and in the lower spherical portion 32, The lower the position (or closer to the mounting portion 16 or the fuel tank 10), the smaller the cross-sectional area of the portion is continuously reduced. Therefore, when a load in the axial direction (in this embodiment, the vertical direction is also applied) acts on the elastic member 20, the compression amount (or deformation amount) in the axial direction in the upper spherical portion 31 and the lower spherical portion 32 is applied. ) Increases, the contact area increases continuously. The shape of the contact area at this time is also substantially circular.

  Referring to FIGS. 3 to 6, the upper contact portion 21, the lower contact portion 22, and the main body portion 23 of the elastic member 20 form an annular groove 40 formed by the spherical bodies 30, 30 adjacent to each other in the circumferential direction. The connecting portion 23 a forms the bottom wall of the annular groove 40. The annular groove 40 formed around the connecting portion 23a is formed so as to surround the connecting portion 23a over the entire circumference in the longitudinal section of the connecting portion 23a. Accordingly, the annular groove 40 is formed between the spherical portions 31, 31; 32, 32 in the circumferential direction, and the plurality of annular grooves 40 are provided in the elastic member 20 at equal intervals in the circumferential direction. It has been.

  Each annular groove 40 is formed by an upper groove 41 as a first groove formed by the upper spherical portions 31, 31 in the upper contact portion 21 and by the lower spherical portions 32, 32 in the lower contact portion 22. The lower groove 42 as the second groove, and the inner groove 43 and the outer groove 44 formed by the intermediate portions 33 and 33 in the main body portion 23 are included. The upper groove 41 allows the inner space Si and the outer space So to communicate with each other when the upper spherical portion 31 is in contact with the floor panel 3, and the lower groove 42 communicates with the placement portion 16 of each lower spherical surface 32a. In the contact state, the inner space Si and the outer space So are communicated. Further, the inner groove 43 allows the upper groove 41 and the lower groove 42 to communicate with each other between the elastic member 20 and the holding portion 18 in the radial direction in the inner space Si.

  At least a part of each of the upper contact portion 21 and the lower contact portion 22 is disposed at a position overlapping the holding band 50 in plan view (see FIG. 4), and thus is disposed directly above the holding band 50. When the fuel tank 10 is in the support state, each elastic member 20 is loaded with the initial load in the vertical direction by the holding band 50 applied to the fuel tank 10. 16 is pressed and brought into contact with the floor panel 3 and the placement portion 16.

  When the fuel tank 10 is in the support state and the fuel tank 10 is not oscillating (hereinafter, referred to as “initial support state”), each upper spherical portion 31 has an apex 31b (see FIG. 6). The lower sphere portion 32 is in contact with the floor panel 3 in a state substantially close to point contact or in a small contact area, and each of the lower sphere portions 32 has a placement portion 16 (see FIG. 6) in a state close to point contact or in a small contact area. ).

For this reason, when the automobile is running, due to vibrations generated in at least one of the fuel tank 10 and the vehicle body 2, a load (hereinafter simply referred to as a vertical component) is applied to the elastic member 20 in the vertical direction. A region where the contact area is small in the range in which the contact area changes when the load is applied, or when the load is a small load that is equal to or less than a predetermined value set in advance. Therefore, the upper spherical portion 31 and the lower spherical portion 32 are easily elastically deformed.
Therefore, when the load acts on the upper spherical portion 31 and the lower spherical portion 32, or when the load is a small load, the amount of elastic deformation of each spherical portion 31, 32 with respect to the load change amount is large. The effect of suppressing vibration transmission between the floor panel 3 and the fuel tank 10 is excellent.

On the other hand, when the load is a large load exceeding the predetermined value, the contact area gradually increases as the amount of compression in the axial direction increases, and the amount of elastic deformation with respect to the amount of change in the vibration load decreases. Since it becomes difficult to deform | transform 31 and 32, the support stability of the fuel tank 10 improves.
The predetermined value of the load is appropriately set according to the weight of the fuel tank 10 and the predicted magnitude of the load.

Next, operations and effects of the embodiment configured as described above will be described.
In the vibration isolating support device 1 in which transmission of vibration between the vehicle body 2 and the fuel tank 10 is suppressed by elastic deformation of the elastic member 20, the elastic member 20 is arranged in an annular shape around an axis L parallel to the vertical direction. A plurality of contact portions 21 and 22 having a predetermined number of spherical portions 31 and 32, and the predetermined number of spherical portions 31 and 32 have spherical surfaces 31a and 32a having substantially the same shape, and each spherical portion 31 and 32 contact the vehicle body 2 and the fuel tank 10 in the vertical direction on the spherical surfaces 31a and 32a, respectively.
With this structure, the contact portions 21 and 22 of the elastic member 20 are in contact with the vehicle body 2 and the fuel tank 10 at the spherical portions 31 and 32 having a plurality of substantially identical spherical surfaces 31 a and 32 a arranged in an annular shape. Therefore, the variation in rigidity in a different direction in the horizontal direction (or the circumferential direction of the elastic member 20) that is orthogonal to the vertical direction is reduced, and different horizontal directions including the front-rear direction and the left-right direction (or The rigidity of the elastic member 20 in the circumferential direction can be made uniform. And the uniformity of the rigidity in a different horizontal direction improves, so that the number of the spherical parts 31 and 32 is increased.
Further, the contact surfaces of the spherical portions 31 and 32 that are the contact portions with the vehicle body 2 or the fuel tank 10 in the contact portions 21 and 22 are spherical surfaces 31a and 32a. Since each spherical surface 31a, 32a has a substantially circular cross-sectional shape in a plane perpendicular to the vertical direction, the spherical portions 31, 32 themselves are rigid in any horizontal direction including the front-rear direction and the left-right direction. Is almost uniform.
As a result, since the variation in the vibration isolating performance of the elastic member 20 against a load having a horizontal component can be reduced, the isotropy of the vibration isolating performance is improved, and thus the vibration isolating performance of the elastic member 20 is improved.
Moreover, since the contact portions of the contact portions 21 and 22 with the vehicle body 2 and the fuel tank 10 are the spherical portions 31 and 32, the initial stage of the action of the load on the elastic member 20 and when the load is a small load, 2 and the fuel tank 10 have a small contact area, so that the spherical portions 31 and 32 are easily elastically deformed, and a gap is formed between the spherical portions 31 and 31; 32 and 32 adjacent in the circumferential direction. The spherical portions 31 and 32 are more easily elastically deformed. As a result, the effect of suppressing vibration transmission between the fuel tank 10 and the vehicle body 2 is improved in the initial stage of the action of the load and when the load is a small load.

In the annular elastic member 20, the upper contact portion 21 has the first predetermined number of upper spherical portions 31 having the same shape, and the lower contact portion 22 has the second predetermined number of lower spherical shapes having the same shape. The upper contact portion 21 includes an upper groove 41 that communicates the inner space Si and the outer space So between the spherical portions 31 adjacent in the circumferential direction in the contact state with the vehicle body 2. In the contact state with the fuel tank 10, the side contact portion 22 forms a lower groove 42 that connects the inner space Si and the outer space So between the lower spherical portions 32 adjacent in the circumferential direction.
With this structure, when the elastic member 20 of the anti-vibration support device 1 is used in an environment where it is exposed to foreign matter such as water or dust, the upper portion between the vehicle body 2 and the upper contact portion 21 that are in contact with each other. Since the side groove 41 is formed, and the lower groove 42 is formed between the fuel tank 10 and the lower contact portion 22 in contact with each other, foreign matter that has entered the inner space Si of the elastic member 20 is And it becomes easy to be discharged into the outer space So through the lower groove 42. As a result, a decrease in the vibration isolation performance of the elastic member 20 due to the foreign matter is suppressed, and good vibration isolation performance can be maintained.

Each of the predetermined number of spherical bodies 30 of the elastic member 20 includes an upper spherical section 31 and a lower spherical section 32, and an upper groove 41 and a lower groove are provided between the spherical bodies 30, 30 adjacent in the circumferential direction. An annular groove 40 having 42 is formed.
With this structure, the elastic member 20 is formed with the annular groove 40 having the upper groove 41 and the lower groove 42 as part of the elastic member 20 at intervals in the circumferential direction. It becomes easy to be discharged into the outer space So through 40, and the discharging property of the foreign matter from the inner space Si is improved.
Furthermore, since the annular groove 40 includes the inner groove 43 in addition to the upper groove 41 and the lower groove 42, the discharge of foreign matters from the inner space Si is further improved.

The holding band 50 for holding the fuel tank 10 with respect to the vehicle body 2 is in the vertical direction with respect to the fuel tank 10 with the upper contact portion 21 and the lower contact portion 22 in contact with the vehicle body 2 and the fuel tank 10, respectively. Thus, the fuel tank 10 is supported on the opposite side to the vehicle body 2 side, and the upper spherical portion 31 and the lower spherical portion 32 are arranged at positions overlapping the holding band 50 when viewed from the vertical direction.
With this structure, the fuel tank 10 is supported by the holding band 50 with respect to the vehicle body 2, so that the upper contact portion 21 and the lower contact portion 22 of the elastic member 20 are in the support state of the fuel tank 10 by the holding band 50. Since the vehicle body 2 and the fuel tank 10 are in contact with each other, the elastic member 20 exhibits a transmission suppressing effect even for minute vibrations between the fuel tank 10 and the vehicle body 2.

  Next, second, third, and fourth embodiments of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in the shape of the elastic member, and the rest has basically the same configuration. Therefore, description of the same part is omitted or simplified, and different points will be mainly described. In addition, about the member same as the member of 1st Embodiment, or the corresponding member, the same code | symbol was used as needed.

Referring to FIGS. 7 and 8, the second embodiment is different from the first embodiment in terms of the connecting portion of the spherical body 30 of the elastic member 20. In the main body portion 23 of the elastic member 20 of the second embodiment, the connecting portion 23b in which the spherical bodies 30 adjacent to each other in the circumferential direction are coupled to each other has substantially the same longitudinal sectional shape in a predetermined range in the circumferential direction. And a columnar portion extending along the circumferential direction. And in this 2nd Embodiment, this connection part 23b has a substantially circular longitudinal cross-sectional shape, and has a cylindrical part. As another example of the connecting portion 23b, the connecting portion 23b may have a columnar shape curved in an arc shape in the circumferential direction.
Around the connecting portion 23b, an annular groove 40 having the connecting portion 23b as a bottom wall is formed. As in the first embodiment, the annular groove 40 includes the upper groove 41 formed between the spherical portions 31 and 31 in the upper contact portion 21 in the circumferential direction, and the spherical portion 32 and the lower contact portion 22. 32 has a lower groove 42 formed between the circumferential portions 32 and an inner groove 43 and an outer groove 44 formed between the intermediate portions 33 and 33 of the main body portion 23 in the circumferential direction.
And according to this 2nd Embodiment, the same operation and effect as a 1st embodiment are produced.

Referring to FIG. 9, in the third embodiment, the elastic member 120 has an annular shape in which the predetermined number of elastic elements 130 having substantially the same shape are connected in a circumferential direction to form a single member. It is an annular body. Each elastic element 130 includes an upper spherical portion 31 having an upper spherical surface 31 a, a lower spherical portion 32 having a lower spherical surface 32 a, and an intermediate portion 133 between both spherical portions 31 and 32.
The elastic member 120 includes the upper contact portion 21 having the first predetermined number of upper spherical portions 31, the lower contact portion 22 having the second predetermined number of lower spherical portions 32, and the main body portion 123. Have. The connecting portion 123a of the main body portion 123 is a portion formed by partially overlapping a cylinder, which is a basic shape of the intermediate portion 133, in the circumferential direction. An annular groove having an upper groove 41, a lower groove 42, an outer groove 44 and an inner groove (not shown) corresponding to the inner groove 43 of the first embodiment is provided between the elastic body elements 130 adjacent to each other in the circumferential direction. A groove 40 is formed.

  According to the third embodiment, the same operations and effects as the first embodiment are exhibited, and the following operations and effects are exhibited. Compared to the case where the elastic body element is the spherical body 30, the required size of the elastic member 120 in the axial direction can be ensured even when the number of elastic body elements 130 constituting the elastic member 120 is increased. It becomes easy.

  Referring to FIG. 10, in the fourth embodiment, the elastic member 220 has an annular shape in which the predetermined number of elastic elements 230 having substantially the same shape are connected in the circumferential direction to form a single member. It is an annular body. Each elastic element 230 includes an upper spherical portion 31 having an upper spherical surface 31a, and a base portion 234 having a shape obtained by dividing a cylinder in the circumferential direction. In FIG. 10, for convenience of explanation, the boundary between the base portions 234 adjacent in the circumferential direction is indicated by a two-dot chain line.

The elastic member 220 includes an upper contact portion 21 having the predetermined number of upper spherical portions 31 and a main body portion 223 in which base portions 234 and 234 adjacent in the circumferential direction are coupled to each other. An upper groove 41 is formed between the elastic elements 230 adjacent to each other in the circumferential direction, and a plurality of axial grooves (not shown) extend in the axial direction on the inner peripheral surface of the base 234. In addition, a plurality of radial grooves 242 that are provided at intervals in the circumferential direction and communicate with the inner space corresponding to the inner space Si are provided at intervals in the circumferential direction. The foreign matter that has entered the inner space of the elastic member 220 is discharged through the upper groove 41, the axial groove, or the radial groove 242.
According to this 4th Embodiment, the effect similar to 1st Embodiment is show | played regarding the isotropy of the vibration proof performance of the elastic member 20. FIG.

Hereinafter, an embodiment in which a part of the configuration of the above-described embodiment is changed will be described with respect to the changed configuration.
The support 15 may be provided on the floor panel 3 instead of the fuel tank 10, or may be provided on the fuel tank 10 and the floor panel 3.
The holding member may be a member other than the holding band 50, for example, a bolt.
The anti-vibration support device 1 may support the supported member on the support member by using only the elastic member 20 without providing the holding member.
The first predetermined number and the second predetermined number may be different. In this case, the shapes of the first spherical portion and the second spherical portion may be different or the same. And when a shape is the same, the diameter (namely, outer diameter and inner diameter) of a 1st, 2nd contact part may differ.
The intermediate portion of the elastic element may be formed in a columnar shape such as a substantially cylindrical shape or a substantially prismatic shape without having a surface that is a part of a spherical surface. For example, each elastic element constituting the elastic member 20 may have a shape in which the longitudinal cross-sectional shape is substantially elliptical.
The basic shape of the elastic element constituting the elastic body may be a rotating body whose size in the axial direction is larger than the size in the circumferential direction.
The facing direction may be a direction other than the vertical direction.
The anti-vibration support device 1 may be provided in a vehicle other than an automobile or a machine other than a vehicle. The support member may be a member other than the vehicle body 2, and the supported member may be a member other than the fuel tank 10.

DESCRIPTION OF SYMBOLS 1 Anti-vibration support apparatus 2 Car body 10 Fuel tank 20,120,220 Elastic member 21,22 Contact part 30 Spherical body 130,230 Elastic body element 31,32 Spherical part 31a, 32a Spherical surface 40 Annular groove 41 Upper groove 42 Lower groove 50 Holding band L Axis Si Inner space So Outer space

Claims (4)

An elastic member is disposed between the support member and the supported member in a facing direction in which the support member and the supported member supported by the support member face each other, and the support is supported by elastic deformation of the elastic member. In the vibration-proof support device in which transmission of vibration between the member and the supported member is suppressed,
The elastic member has a plurality of substantially identical spherical portions arranged in an annular shape around an axis parallel to the opposing direction,
Each of the spherical portions is in contact with the supporting member or the supported member in the facing direction, and the anti-vibration supporting device is characterized in that The anti-vibration support device according to claim 1,
The elastic member is an annular body in which the radially inner side of the spherical part is an inner space and the radially outer side of the spherical part is an outer space,
An anti-vibration support device, wherein an annular groove is formed between the spherical portions in the circumferential direction. The anti-vibration support device according to claim 1 or 2, further comprising a holding band for holding the supported member with respect to the support member.
The holding band supports the supported member in a state where the spherical portion is in contact with the supporting member or the supported member,
The anti-vibration support device according to claim 1, wherein the spherical portion is disposed at a position overlapping the holding band when viewed from the facing direction. The anti-vibration support device according to any one of claims 1 to 3,
The support member is a vehicle body;
The supported member is a fuel tank disposed below the vehicle body,
The anti-vibration support device according to claim 1, wherein the facing direction is a vertical direction of the vehicle.

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