JP2016125522A - Bracket for vibration-proof device and vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket for a vibration-proof device showing a superior durability and a vibration-proof device.SOLUTION: This invention relates to a bracket 1 for a vibration-proof device to which a vibration-proof device main body 10 comprising a fixing member 12 and elastic members 13 resiliently connected to the fixing member 12 is fixed. The bracket 1 has a resin bracket main body 12 for supporting the vibration-proof device main body 10 and cylindrical fixing members 3 arranged at the bracket main body 12 having flange parts 3b at both ends for fixing the bracket main body 12 to either a vibration generating part or a vibration receiving part. At least one of the flanges 3b of the fixing members 3 shows a curved line that contours Lof an axial inner surface 3c as seen at a sectional view in an axial direction of the fixing members 3 are gradually increased as they face from outer peripheral edges 3bof the flanges 3b at an axial thickness D of the flanges 3b toward the inner peripheral edges 3bof the flanges 3b and the vibration-proof device 100 has the bracket 1 and the vibration-proof device main body 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vibration isolator bracket and a vibration isolator.

  Among the vibration isolator brackets, there is a resin bracket in which a cylindrical fastening fitting having flange portions formed at both ends is integrally formed (see, for example, Patent Document 1). The anti-vibration device bracket described in Patent Document 1 is fixed to the vibration generating portion or the vibration receiving portion by screwing a nut into a bolt inserted through the fastening metal fitting.

Japanese Patent Laid-Open No. 10-82442

  Since the vibration isolator bracket described in Patent Document 1 has flange portions formed at both ends of the fastening bracket, it is effective for increasing the strength of the fastening bracket itself and at the same time inside the flange portion of the fastening bracket. The strength of the resin bracket can be improved by allowing the resin to enter.

  However, the vibration isolator bracket described in Patent Document 1 has room for improvement in terms of durability because stress tends to concentrate on the periphery of the flange portion of the fastening bracket when a load is input.

  An object of the present invention is to provide a vibration isolator bracket and a vibration isolator having excellent durability.

An anti-vibration device bracket according to the present invention includes an anti-vibration device body including an attachment member connected to one of a vibration generating unit and a vibration receiving unit, and an elastic body elastically connected to the attachment member. An anti-vibration device bracket to be attached, wherein the anti-vibration device bracket has a cylindrical shape having a resin-made bracket body that supports the anti-vibration device body and flange portions at both axial ends. A fixing member arranged on the main body for fixing the bracket main body to either the vibration generating portion or the vibration receiving portion, and at least one of the flange portions of the fixing member is fixed In the axial sectional view of the member, the contour of the inner surface in the axial direction gradually increases the axial thickness of the flange portion from the outer peripheral edge of the flange portion toward the inner peripheral edge of the flange portion. Characterized in that to a curve.
According to the vibration isolator bracket of the present invention, stress concentration on the bracket body is alleviated, and durability can be improved.

In the vibration isolator bracket of the present invention, the contour line increases in the axial thickness of the flange portion from the outer peripheral edge of the flange portion to the inner peripheral edge of the flange portion toward the inner peripheral edge of the flange portion. A curve that gradually increases is preferable.
In this case, the stress concentration on the bracket body is further reduced, and the durability can be improved.

In the vibration isolator bracket according to the aspect of the invention, it is preferable that the contour line is a convex curve toward the outside of the fixing member.
In this case, the strength of the fixing member can also be improved.

In the vibration isolator bracket of the present invention, the bracket main body has an annular recess in which the axial inner surface of the flange portion of the fixing member is combined, and the recess recessed surface of the fixing member in an axial sectional view of the fixing member. The contour line is preferably the same curve as the contour line on the inner surface in the axial direction of the flange portion of the fixing member, and is a curve smoothly connected to the side surface of the bracket body.
In this case, the stress concentration on the bracket body is further reduced, and the durability can be improved.

A vibration isolator according to the present invention includes the vibration isolator bracket according to any one of the above and the vibration isolator main body attached to the vibration isolator bracket.
According to the vibration isolator of the present invention, stress concentration on the bracket body is alleviated, and durability can be improved.

  According to the present invention, it is possible to provide a vibration isolator bracket and a vibration isolator having excellent durability.

It is a front view of the vibration isolator which concerns on one Embodiment of this invention. It is a rear view of the vibration isolator of FIG. It is a top view of the vibration isolator of FIG. FIG. 2 is a perspective sectional view showing the vibration isolator of FIG. 1 obliquely from above with the same cross section as an axial section of a collar (fixing member). It is sectional drawing which expands and partially shows sectional drawing of FIG. 4 from an axial direction. It is a perspective view which shows the bracket main body of the bracket for vibration isolator which concerns on one Embodiment of this invention used for the vibration isolator of FIG. 1 from diagonally upward.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show a vibration isolator 100 according to an embodiment of the present invention. The vibration isolator 100 includes a vibration isolator bracket 1 according to an embodiment of the present invention, and a vibration isolator body 10 attached to the vibration isolator bracket 1.

  The vibration isolator main body 10 elastically connects the cylindrical member 11, the mounting member 12 connected to one of the vibration generating unit and the vibration receiving unit, and the cylindrical member 11 and the mounting member 12. And an elastic body 13. Here, “connected to one of the vibration generating unit and the vibration receiving unit” means not only when directly connected to the vibration generating unit or the vibration receiving unit, but also between the vibration generating unit or the vibration receiving unit. In addition, it includes a case where they are indirectly connected through other members. Moreover, as a combination of a vibration generation part and a vibration receiving part, an engine and a vehicle body (chassis) are mentioned, for example.

  In the present embodiment, the cylindrical member 11 has an opening A, and the main shaft 12 a of the attachment member 12 is disposed inside the opening A. In the present embodiment, the material of the cylindrical member 11 can be metal, but is not limited to metal. For example, when the cylindrical member 11 and the bracket body 2 are integrally formed, a bracket is used. Together with the main body 2, it can be made of resin.

  Moreover, in this embodiment, the attachment member 12 has the main axis | shaft 12a and the attaching part 12b. The attachment portion 12b is formed integrally with one end of the main shaft 12a. In the present embodiment, the vibration generating part or the vibration receiving part is connected to the attachment part 12b. The attachment member 12 can be a metal (for example, iron) member, but the material of the attachment member 12 is not limited to this, and may be a resin member.

  In the present embodiment, the attachment member 12 is supported by the cylindrical member 11 via the elastic body 13. In this embodiment, the elastic body 13 is arrange | positioned in the two positions arrange | positioned at intervals around the main axis | shaft 12a of the attachment member 12. As shown in FIG. The two elastic bodies 13 are each made of an elastic material such as rubber. In the present embodiment, the elastic body 13 is made of a rubber material that is bonded to the cylindrical member 11 and the main shaft 12 a of the mounting member 12. The number and layout of the elastic bodies 13 are not limited to this, and can be changed as appropriate.

  The vibration isolator bracket 1 includes a resin-made bracket body 2 and a collar (fixing member) 3.

  In the present embodiment, the bracket body 2 is provided with a support portion 2 a that supports the cylindrical member 11 of the vibration isolator body 10. In the present embodiment, the cylindrical member 11 of the vibration isolator main body 10 is formed integrally with the bracket main body 2. In the present embodiment, the cylindrical member 11 of the vibration isolator body 10 is a cylindrical member, so that the support portion 2a is an inner peripheral surface of a round hole that defines the opening A. It is not limited to the peripheral surface. The support portion 2a can have an inner surface shape that matches the appearance of the cylindrical member 11. For example, when the bracket main body 2 is a cylindrical member 11 of the vibration isolator main body 10 and the hollow prismatic shape is used, the inner surface of the support portion 2 a can be a polyhedral shape that matches the external shape of the cylindrical member 11.

  Further, in the present embodiment, the vibration isolator bracket 1 is fixed to the vibration generating portion or the vibration receiving portion on both the left and right sides of the bracket body 2 when viewed from the extending direction of the main shaft 12a of the mounting member 12. A fixing portion 2b is provided. As shown in FIGS. 3 to 5, the collar 3 has annular flange portions 3 b that protrude outward in the radial direction of the sleeve main body 3 a from the outer peripheral surface of the sleeve main body 3 a at both axial ends of the hollow sleeve main body 3 a. It has a cylindrical shape. The fixing portion 2b of the bracket body 2 is formed with a through-hole penetrating the fixing portion 2b up and down, and the collar 3 has at least a part of the flange portion 3b (almost all in the present embodiment) in the through-hole. In an embedded form, the bracket body 2 is disposed so as to penetrate vertically through the fixing portion 2b. The collar 3 is a fixing member for fixing the bracket body 2 to the other of the vibration generating part and the vibration receiving part by threading a nut and screwing a nut.

As shown in FIG. 5, in this embodiment, at least one of the two annular flange portions 3b (both in the present embodiment) arranged at both ends of the collar 3 has an axial cross section of the collar 3 from the axial direction. When viewed (in the axial cross-sectional view of the collar 3), the contour L ₃ of the axial inner surface 3c indicates the axial thickness D of the flange portion 3b from the outer peripheral edge 3b ₁ of the flange portion 3b to the inside of the flange portion 3b. The curve is gradually increased toward the peripheral edge 3b ₂ . In the present embodiment, the axial cross section of the collar 3 refers to a cross section including the central axis O ₃ of the collar 3. That is, here, the axial direction of the collar 3 refers to a direction extending along the central axis O ₃ of the collar 3. If the contour L ₃ is a curve that gradually increases from the outer peripheral edge 3b ₁ of the flange portion 3b toward the inner peripheral edge 3b ₂ of the flange portion 3b as in the present embodiment, the outer peripheral edge 3b of the flange portion 3b of the collar 3 is mainly used. _The stress concentration on the bracket body 2 that occurs in the vicinity of ₁ (for example, the region X _{1 in} FIG. 5) can be alleviated, and therefore the durability of the vibration isolator bracket 1 and thus the vibration isolator 100 can be improved. Can do.

In particular, in the present embodiment, the contour L ₃ has an axial thickness D of the flange portion 3b from the outer peripheral edge 3b ₁ of the flange portion 3b to the inner peripheral edge 3b ₂ of the flange portion 3b. It is a curve that gradually increases toward the peripheral edge 3b ₂ . If the contour L ₃ is a curve that gradually increases until reaching the inner peripheral edge 3b ₂ of the flange portion 3b as in the present embodiment, the vicinity of the inner peripheral edge 3b ₂ of the flange portion 3b of the collar 3 (for example, the region X in FIG. 5). _The stress concentration on the bracket body 2 that occurs in ₂ ) can be alleviated, and therefore the durability of the vibration isolator bracket 1 and hence the vibration isolator 100 can be improved. Here, the inner peripheral edge 3b ₂ of the flange portion 3b of the collar 3 is a boundary between the sleeve body 3a and the flange portion 3b.

The contour L ₃ can be a curve that is convex toward the inside of the flange portion 3b, or can be a curve that is convex toward the outside (the bracket body 2 side) of the flange portion 3b. In the present embodiment, as shown in FIG. 5, the contour L ₃ is a convex curve toward the outside of the flange portion 3 b. Specifically, the contour L ₃ is an arc-shaped curve formed with a radius of curvature R centering on an arbitrary point. Here, the radius of curvature R and the center point can be appropriately set according to the shape and size of the vibration isolator bracket 1, the bracket body 2, and the collar 3.

Further, as shown in FIG. 5, the outer peripheral edge 3b ₁ of the flange portion 3b is configured by a curved curve (in the present embodiment, an arc-shaped curve having a radius r ₁ ) toward the radially outer side of the flange portion 3b. It is possible. Further, as shown in FIG. 5, the inner peripheral edge 3b ₂ of the flange portion 3b is also configured by a curved curve (in the present embodiment, an arc-shaped curve having a radius r ₂ ) toward the radially inner side of the flange portion 3b. It is possible.

Further, as shown in FIGS. 5 and 6, in this embodiment, the bracket body 2 has an annular recess 2 d in which the axial inner surface 3 c of the flange portion 3 b of the collar 3 is joined, When the bracket body 2 is viewed from the axial direction in the same cross section, the contour line L _2c of the recess surface 2c of the recess 2d is the same curve as the contour line L ₃ of the axial inner surface 3c of the flange portion 3b of the collar 3. In addition, the curve is smoothly connected to the side surface 2s of the bracket body 2. Specifically, the contour L _2c of the recessed surface 2 c of the bracket body 2 is a curve having the same radius R as the contour L ₃ of the axially inner surface 3 c of the flange portion 3 b of the collar 3, and the side surface 2 s of the bracket body 2. The contour L _{2s is} also a curve with the same radius R as the contour L ₃ of the axially inner surface 3c of the flange portion 3b of the collar 3, and the contour L _2c of the recessed surface 2c of the bracket body 2 and the contour L _{2s of the} side surface _2s are It is connected smoothly. In this case, the bracket body 2 is generated near the outer peripheral edge 3b ₁ of the flange portion 3b of the collar 3 (for example, the region X _{1 in} FIG. 5) by smoothly connecting the side surface 2s of the bracket body 2 and the recessed surface 2c. Therefore, the durability of the vibration isolator bracket 1 and thus the vibration isolator 100 can be improved.

If the contour L ₃ is a curve that gradually increases the axial thickness D of the flange portion 3b from the outer peripheral edge 3b ₁ of the flange 3b toward the inner peripheral edge 3b ₂ of the flange portion 3b, at least the flange portion of the collar 3 The stress concentration on the bracket body 2 that occurs in the vicinity of the outer peripheral edge 3b _{1 of the} 3b (for example, the region X _{1 in} FIG. 5) can be reduced. In this case, the dimension from the outer peripheral edge 3b ₁ of the flange 3b to the inner peripheral edge 3b ₂ of the flange 3b in the radial direction of the collar 3 (direction orthogonal to the central axis O ₃ ), that is, the radial dimension of the flange 3b is L _3b . Then, the outline L ₃ from the outer peripheral edge 3b ₁ of the flange 3b, 1/2 or more radial dimension L _3b of radial dimension ΔL from the outer peripheral edge 3b ₁ of the flange 3b is a flange 3b, the inner peripheral edge 3b of the flange 3b It is preferable to make the curve gradually increase the axial thickness D of the flange portion 3b from ₂ to the radial position.

In particular, in the vibration isolator bracket 1 according to the present embodiment, the contour L ₃ has the axial thickness D of the flange portion 3b from the outer peripheral edge 3b ₁ of the flange portion 3b to the inner peripheral edge 3b ₂ of the flange portion 3b. Is a curve that gradually increases toward the inner peripheral edge 3b ₂ of the flange portion 3b.
In this case, the axial inner surface 3c of the contour L ₃ of the flange portion 3b of the collar 3, by smoothly leading up to the sleeve body 3a, is further alleviated stress concentration on the bracket body 2, therefore, anti-vibration device bracket 1. As a result, the durability of the vibration isolator 100 can be improved.

Further, in the vibration isolator bracket 1 according to the present embodiment, the contour L ₃ is a convex curve toward the outside of the collar 3.
In this case, since the axial thickness D of the flange portion 3b of the collar 3 can be efficiently increased as a whole, the strength of the collar 3 can also be improved.

Furthermore, in the vibration isolator bracket 1 according to the present embodiment, the bracket body 2 has an annular recess 2d in which the axial inner surface 3c of the flange portion 3b of the collar 3 is joined, and the collar 3 is viewed in an axial sectional view. The contour line L _2c of the recess surface 2 c of the recess 2 d is the same curve as the contour line L ₃ of the axially inner surface 3 c of the flange portion 3 b of the collar 3 and is a curve smoothly connected to the side surface 2 s of the bracket body 2. .
In this case, lead to smooth the outline L _2c contour L _2s depression surface 2c side 2s of the bracket body 2, more are more relaxed stress concentration on the bracket body 2, therefore, anti-vibration device bracket 1 and thus The durability of the vibration isolator 100 can be improved.

The vibration isolator 100 according to the present embodiment includes the vibration isolator bracket 1 and the vibration isolator main body 10 attached to the vibration isolator bracket 1.
According to the vibration isolator 100 according to the present embodiment, stress concentration on the bracket body 2 is alleviated, and therefore the durability of the vibration isolator 100 can be improved.

  Further, in the present invention, as in the vibration isolator 100 according to the present embodiment, the cylindrical member 11 of the vibration isolator main body 10 and the bracket main body 2 of the vibration isolator bracket 1 are configured separately. The cylindrical member 11 and the bracket main body 2 can be configured integrally.

  Thus, according to the present invention, it is possible to provide the vibration isolator bracket 1 and the vibration isolator 100 having excellent durability.

  The above is an example of the embodiment of the present invention, and various modifications can be made according to the description of the scope of claims. For example, in this embodiment, the bracket 1 for vibration isolator is an insert-molded product in which the collar 3 is an insert product and the bracket body 2 is injection-molded using resin, so that the collar 3 is embedded in the bracket body 2. However, the means for arranging the collar 3 on the bracket body 2 is not limited to insert molding.

  The present invention relates to a vibration isolator to which a vibration isolator main body is attached, which includes an attachment member connected to one of a vibration generating portion and a vibration receiving portion, and an elastic body elastically connected to the attachment member. It can be adopted for brackets and vibration isolator.

1: Bracket for vibration isolator, 2: Bracket body, 2a: Support part, 2b: Fixed part, 2c: Recessed surface, 2d: Annular recess, 2s: Side surface, 3: Collar (fixing member), 3a: Sleeve body 3b: flange part, 3b ₁ : outer peripheral edge of the flange part, 3b ₂ : inner peripheral edge of the flange part, 3c: axial inner surface of the flange part, A: opening, D: axial thickness, L _2c : bracket body L _2s : contour of side surface of bracket body, L ₃ : contour of inner surface in axial direction of collar flange portion, X ₁ : region near outer periphery of collar flange portion of bracket body, X ₂ : Bracket body area near the inner peripheral edge of the collar flange part, R: Radius, 10: Vibration isolator body, 11: Cylindrical member, 12: Mounting member, 12a: Main shaft, 12b: Mounting part, 13: Elasticity body 100: anti-vibration device

Claims (5)

A vibration isolator bracket to which a vibration isolator main body is attached, comprising: an attachment member connected to one of a vibration generating portion and a vibration receiving portion; and an elastic body elastically connected to the attachment member. ,
The vibration isolator bracket is
A resin-made bracket body that supports the vibration isolator body;
A fixing member for fixing the bracket main body to either the vibration generating portion or the vibration receiving portion, which has a cylindrical shape having flange portions at both ends in the axial direction and is disposed on the bracket main body. And
At least one of the flange portions of the fixing member is an axial cross-sectional view of the fixing member, and the contour line of the axial inner surface determines the axial thickness of the flange portion from the outer peripheral edge of the flange portion. A bracket for a vibration isolator, wherein the bracket is a curve that gradually increases toward the inner periphery.   In Claim 1, the said outline is a curve which increases gradually the axial direction thickness of the said flange part toward the inner periphery of the said flange part from the outer periphery of the said flange part to the inner periphery of the said flange part. , Bracket for vibration isolator.   3. The vibration isolator bracket according to claim 1, wherein the contour line is a convex curve toward the outside of the fixing member. 4.   4. The bracket main body according to claim 1, wherein the bracket body has an annular recess in which the axial inner surfaces of the flange portions of the fixing member are combined, and the recess is viewed in an axial sectional view of the fixing member. The bracket for an anti-vibration device, wherein the contour line of the hollow surface is the same curve as the contour line of the axially inner surface of the flange portion of the fixing member and is smoothly curved with the side surface of the bracket body .   An anti-vibration device comprising the anti-vibration device bracket according to claim 1 and the anti-vibration device body attached to the anti-vibration device bracket.

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