JP2015209941A - Vibration preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight and size of a vibration preventing device by omitting an external cylindrical metal fitting, and to suppress movement of a body member to a bracket.SOLUTION: A vibration preventing device 10 includes: a body member 14 in which an elastic body 20 is connected to a fitting part 18 fitted into any one of a vibration generation part and a vibration reception part; and a bracket 16 that is fitted into the other one of the vibration generation part and vibration reception part, and has a recess part 44 into which the elastic body 20 of the body member 14 is fitted, and in which a slip-off prevention part 52 preventing slip-off of the body member 14 is provided at an opening end part 48 of the recess part 44.

Description

  The present invention relates to a vibration isolator that is used when mounting a vibration generating unit such as an automobile engine on a vibration receiving unit such as a vehicle body.

  An anti-vibration device in which a mounting device is fixed to a bracket with a bolt is disclosed (see Patent Document 1). The mounting device has a cylindrical outer frame metal fitting, and a mount member (main body member) is disposed inside the outer frame metal fitting. The mount member (main body member) is formed by vulcanizing and molding a rubber-like elastic body on a cylindrical metal fitting to which a bolt is fastened.

JP 2007-113693 A

  Although not specified in the above-described conventional example, the lower cylindrical surface of the mount member (main body member) is generally constituted by an outer cylinder fitting, and the outer cylinder fitting is press-fitted inside the outer frame fitting. As a result, the mount member is fixed to the bracket. From the viewpoint of reducing the weight and size of the vibration isolator, it is conceivable to omit the outer tube fitting. However, in that case, it becomes impossible to fix the mount member (main body member) by press-fitting the outer cylinder fitting.

  In view of the above fact, an object of the present invention is to make it possible to suppress the movement of the main body member with respect to the bracket while omitting the outer tube metal fitting to reduce the weight and size of the vibration isolator.

  According to a first aspect of the present invention, there is provided an anti-vibration device comprising: a main body member having an elastic body joined to a mounting portion attached to any one of a vibration generating portion and a vibration receiving portion; A bracket that is attached to any one of the two, has a recess into which the elastic body of the main body member is fitted, and is provided with a retaining portion that prevents the main body member from coming off at the opening end of the concave portion. ing.

  In this vibration isolator, since a member such as an outer tube metal fitting is not attached to the main body member having an elastic body, the vibration isolator can be reduced in weight and size. Since a retaining portion is provided at the opening end of the concave portion of the bracket into which the main body member is fitted, the movement of the main body member relative to the bracket can be suppressed.

  According to a second aspect of the present invention, in the vibration isolator according to the first aspect, the retaining portion is provided evenly and intermittently at the opening end portion.

  In this vibration isolator, since the retaining portion is provided evenly and intermittently at the opening end of the recess, the effect of suppressing the movement of the main body member relative to the bracket is enhanced while suppressing the increase in mass of the vibration isolator. Can do.

  According to a third aspect of the present invention, in the vibration isolator according to the first aspect, the retaining portion is continuously provided over the entire circumference of the opening end portion.

  In this vibration isolator, since the retaining portion is continuously provided over the entire circumference of the opening end portion of the recess, the effect of suppressing the movement of the main body member relative to the bracket can be further enhanced.

  According to a fourth aspect of the present invention, in the vibration isolator according to any one of the first to third aspects, the retaining portion is configured using a member separate from the bracket.

  In this vibration isolator, since the retaining portion is configured using a member separate from the bracket, the processing cost of the bracket can be reduced.

  According to the vibration isolator according to the present invention, an excellent effect is obtained that the movement of the main body member with respect to the bracket can be suppressed while the outer cylinder fitting is omitted and the vibration isolator is reduced in weight and size.

It is a disassembled perspective view which shows the vibration isolator which concerns on this embodiment. In the vibration isolator which concerns on this embodiment, it is a disassembled perspective view which shows the state before fastening with an inner bracket and a main-body member. In the vibration isolator which concerns on this embodiment, it is sectional drawing which shows the state before crimping a securing part. In the vibration isolator which concerns on this embodiment, it is sectional drawing which shows the state after crimping a securing part. It is sectional drawing which shows the modification of the vibration isolator which concerns on this embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2, the arrow Z direction is the vehicle vertical direction. The vibration isolator 10 according to the present embodiment is used when, for example, a vibration generating unit (not shown) such as an automobile engine is mounted on a vibration receiving unit 12 (FIG. 2) such as a vehicle body. The vibration isolator 10 includes a main body member 14 and a bracket 16.

  In FIG. 3, the main body member 14 is configured by joining an elastic body 20 to an attachment portion 18. The attachment portion 18 is a member attached to either the vibration generating portion or the vibration receiving portion 12, for example, the vibration generating portion in the main body member 14. Specifically, the attachment portion 18 is a metal member formed in, for example, a substantially cylindrical shape, and is attached to the vibration generating portion via the inner bracket 22. The attachment portion 18 and the inner bracket 22 are fastened by, for example, bolts 24. A female screw 26 to which the bolt 24 is fastened is formed along the arrow Z direction at the center of the mounting portion 18 in the radial direction. The female screw 26 opens at the upper end of the mounting portion 18.

  The inner bracket 22 is a metal member that is inserted into the bracket 16 and fastened to the attachment portion 18 of the main body member 14, and has an insertion portion 28 and an attachment portion 30. A through hole 32 for passing the bolt 24 is formed in the insertion portion 28. The attachment portion 30 is a portion located outside the bracket 16 when the insertion portion 28 is inserted into the bracket 16. A plurality of through holes 34 are formed in the attachment portion 30. A bolt or the like (not shown) for fastening the inner bracket 22 to the vibration generating portion is passed through the through hole 34.

  The insertion portion 28 of the inner bracket 22 is covered with a stopper member 36 made of an elastic body such as rubber. A through hole 38 for passing the bolt 24 is formed in the upper portion of the stopper member 36. The stopper member 36 is interposed between the inner bracket 22 and the bracket 16 and limits the amount of displacement of the main body member 14 and the inner bracket 22 with respect to the bracket 16 in the vertical direction (arrow Z direction) and the lateral direction (arrow Y direction). It is a member.

  The elastic body 20 integrally includes a lower part 40 and an upper part 42. The outer peripheral surface of the lower part 40 is, for example, cylindrical. A member such as an outer cylinder fitting (not shown) is not attached to the outer peripheral surface, and rubber or the like is exposed. The outer peripheral surface of the upper part 42 in a side view is tapered toward the upper side. This is because the average outer diameter of the attachment portion 18 is smaller than the outer diameter of the lower portion 40 of the elastic body 20. And the upper part 42 is adhere | attached on this attachment part 18 so that the outer periphery of the attachment part 18 may be covered. A lower end portion of the attachment portion 18 is covered with a lower portion 40 of the elastic body 20. Thereby, the attachment part 18 is in a state where only the upper end where the female screw 26 opens is exposed.

  The bracket 16 is a metal member attached to either the vibration generating unit or the vibration receiving unit 12, for example, the vibration receiving unit. The bracket 16 has a recess 44 into which the lower part 40 of the elastic body 20 of the main body member 14 is fitted. The concave portion 44 is an inner portion of the cylindrical portion 46 and has an opening end portion 48 that opens downward. The inner diameter of the open end 48 is set to be one step larger in the recess 44. The inner diameter of the recess 44 is set to be the same as or slightly smaller than the outer diameter of the lower portion 40 of the elastic body 20. Therefore, when the main body member 14 is assembled to the bracket 16, the lower portion 40 of the elastic body 20 is press-fitted into the concave portion 44 from below. The concave portion 44 of the bracket 16 and the elastic body 20 of the main body member 14 are in close contact with each other but are not fixed, that is, the concave portion 44 and the elastic body 20 are not bonded. The cylindrical portion 46 has an opening end portion 50 that opens upward. The attachment end 18 of the main body member 14 is inserted through the opening end 50.

  In FIG. 4, the opening end portion 48 of the recess 44 is provided with a retaining portion 52 that prevents the main body member 14 from coming off. The retaining portion 52 is configured using a metal plate 53 which is an example of a member separate from the bracket 16. Further, the retaining portion 52 is provided continuously over the entire circumference of the opening end portion 48. As shown in FIGS. 3 and 4, the outer diameter of the metal plate 53 is set to be larger than the outer diameter of the lower portion 40 of the elastic body 20 and smaller than the inner diameter of the opening end 48. The metal plate 53 is pressed against the lower surface of the lower portion 40 of the elastic body 20 inside the opening end portion 48 (FIG. 3), and the opening end portion 48 is bent inward in the radial direction and caulked to the metal plate 53. Thus, the metal plate 53 is fixed to the lower end of the recess 44 (cylindrical portion 46) (FIG. 4). That is, the metal plate 53 is fixed to the concave portion 44 of the bracket 16 by roll caulking.

  Note that the means for fixing the metal plate 53 to the bracket 16 is not limited to roll caulking. For example, as shown in FIG. 5, a flange portion 47 may be provided at the lower end of the cylindrical portion 46, and a metal plate 53 may be clinched to the lower surface of the flange portion 47. Clinch joining is a rivet method in which, for example, a cylindrical rivet (not shown) is used and joining is performed by molding using a press. In addition, welding, adhesion, fastening, or the like can be used as the fixing means.

  A rectangular tube portion 54 is fixed above the cylindrical portion 46. The axial direction of the rectangular tube portion 54 corresponds to the insertion direction of the inner bracket 22. At least one end of the rectangular tube portion 54 in the axial direction is opened to allow the inner bracket 22 to be inserted. A through hole 58 for passing the bolt 24 is formed in the upper wall portion 56 of the square tube portion 54.

  A pair of leg portions 60 are provided on both sides of the rectangular tube portion 54 in the arrow Y direction. The leg portion 60 is formed with a through hole 62 for passing a bolt (not shown) for fastening the bracket 16 to the vibration receiving portion 12.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 4, in the vibration isolator 10 according to the present embodiment, since a member such as an outer cylindrical metal fitting is not attached to the main body member 14 having the elastic body 20, the vibration isolator 10 is reduced in weight and size. It becomes possible.

  Since the stopper 52 is continuously provided over the entire periphery of the opening end 48 of the recess 44 at the opening end 48 of the recess 44 of the bracket 16 into which the body member 14 is fitted, the body member 14 with respect to the bracket 16 is provided. , Specifically, downward movement can be suppressed. Since the metal plate 53 is provided separately from the bracket 16, the processing cost of the bracket 16 can be reduced. Further, the durability is higher than when a part of the bracket 16 is bent and the retaining portion 52 is integrally formed.

[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is.

  For example, the retaining portion 52 may be provided evenly and intermittently at the opening end 48 of the recess 44. For example, in FIG. 4, intermittent tooth portions (not shown) in the circumferential direction are formed in the opening end portion 48 of the cylindrical portion 46, and the tooth portions are bent and caulked. In this case, the effect of suppressing the movement of the main body member 14 relative to the bracket 16 can be enhanced while suppressing an increase in the mass of the vibration isolator 10. Further, although the retaining portion 52 is configured using the metal plate 53 that is a separate member from the bracket 16, the separate member is not limited to the metal plate, and other materials may be used. . Further, the metal plate 53 may be omitted, and the retaining portion 52 may be configured by bending a part of the bracket 16.

  The shape of the elastic body 20 is arbitrary. For example, the polygonal shape may be sufficient as the cross-sectional shape of the outer peripheral surface which cut | disconnected the lower part 40 of the elastic body 20 in the horizontal direction. Further, the outer peripheral surface of the upper part 42 in the side view is tapered toward the upper side, but is not limited thereto, and the shape of the upper part 42 may be a cylindrical shape, a prismatic shape, or the like.

DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Vibration receiving part 14 Main body member 16 Bracket 18 Mounting part 20 Elastic body 44 Recessed part 48 Opening end part 52 Stopping part 53 Metal plate (separate member)

Claims (4)

A main body member in which an elastic body is joined to an attachment portion attached to any one of the vibration generating portion and the vibration receiving portion;
A recess is attached to one of the vibration generating portion and the vibration receiving portion, and the elastic body of the main body member is fitted inside, and prevents the main body member from coming off at the opening end of the concave portion. A bracket provided with a retaining portion;
Anti-vibration device with   The vibration isolator according to claim 1, wherein the retaining portion is provided evenly and intermittently at the opening end portion.   The vibration isolator according to claim 1, wherein the retaining portion is continuously provided over the entire circumference of the opening end.   The vibration isolator according to any one of claims 1 to 3, wherein the retaining portion is configured using a member separate from the bracket.

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