JP6526487B2 - Vibration control device - Google Patents

Description

  The present invention relates to a vibration isolation device.

  The conventional vibration damping device includes a first bush in which the inner cylinder and the intermediate cylinder are connected by an elastic body having a hollow formed therein, and a second elastic body having a hollow without the second elastic body. There is one having a second bush in which the inner cylinder and the second outer cylinder are connected, and these two bushes are connected using a connection rod (see, for example, Patent Document 1).

JP, 2014-163448, A

  On the other hand, some vibration damping devices require soft spring characteristics. According to the vibration damping device described in Patent Document 1, obtaining a soft spring characteristic by changing the spring characteristic of the main body elastic body of the first bush and the spring characteristic of the second main body elastic body of the second bush. Can.

  However, it is also a fact that a vibration damping device capable of obtaining soft spring characteristics with a simple configuration is required as market demand.

  An object of the present invention is to provide an antivibration device capable of obtaining soft spring characteristics with a simple configuration.

The vibration damping device according to the present invention comprises an outer mounting member, an inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, and an elastic member connecting the outer mounting member and the inner mounting member. Connecting a first bush having a body, a second bush having an attachment member connected to any one of the vibration generating portion and the vibration receiving portion, and connecting the first bush and the second bush A connecting portion, and the elastic body connects the fixing portion fixed to the outer mounting member, the fixing portion and the inner mounting member, and a pair of the outer mounting member and the non-adhesively formed And a leg portion.
According to the vibration damping device of the present invention, soft spring characteristics can be obtained with a simple configuration.

In the vibration control device according to the present invention, an elastic body can be prevented from being interposed between the attachment member and the connection portion.
In this case, space saving, cost reduction and the like can be achieved by the omission of the elastic body of the second bush.

  According to the present invention, it is possible to provide an anti-vibration device capable of obtaining soft spring characteristics with a simple configuration.

It is a top view showing a vibration control device concerning a 1st embodiment of the present invention. It is a top view which shows the vibration isolator which concerns on the 2nd Embodiment of this invention.

  Hereinafter, various embodiments of the vibration damping device according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a vibration-damping device 1 according to a first embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a first bush which constitutes the vibration isolation device 1. The first bush 10 is disposed between the cylindrical outer attachment member 11, the cylindrical inner attachment member 12 disposed inside the outer attachment member 11, and the outer attachment member 11 and the inner attachment member 12. And an elastic body 13 connecting the two.

  In the present embodiment, the outer attachment member 11 is formed of a cylindrical outer cylinder, and the inner attachment member 12 is fitted with a shaft or the like connected to any one of the vibration generating portion and the vibration receiving portion. It is comprised by the cylindrical inner cylinder. In the present embodiment, the outer attachment member 11 and the inner attachment member 12 are made of, for example, metal.

  Further, in the present embodiment, the elastic body 13 is made of, for example, an elastic material such as rubber. In the present embodiment, the elastic body 13 is formed of a rubber member bonded by vulcanization between the outer attachment member 11 and the inner attachment member 12.

The elastic body 13 has a fixing portion 13 a fixed to the outer mounting member 11 and a pair of leg portions 13 b connecting the fixing portion 13 a and the inner mounting member 12. The two legs 13 b are respectively formed to be non-adhesive (in the example of FIG. 1, separated from the outer mounting member 11) with the outer mounting member 11. In the present embodiment, the two legs 13 b respectively connect the fixing portion 13 a and the inner mounting member 12 via the fixing portion 13 c fixed to the inner mounting member 12 of the elastic body 13. In other words, in the present embodiment, the two legs 13b are respectively connected to the outer mounting member 11 via the fixing portion 13a, and are connected to the inner mounting member 12 via the fixing portion 13c. . Thus, in the present embodiment, the elastic body 13, so as to form two air gaps C ₁ and voids C ₂ between the outer mounting member 11 and the inner mounting member 12.

  Next, in FIG. 1, reference numeral 20 denotes a second bush that constitutes the vibration control device 1. The second bush 20 has an attachment member 21 connected to any one of the vibration generator and the vibration receiver. In the present embodiment, an elastic body such as a rubber elastic body does not intervene between the mounting member 21 and the connection portion 30 described later. In the present embodiment, the second bush 20 is configured only by the mounting member 21.

  The code | symbol 30 is a connection part which comprises the anti-vibration device 1. The connecting portion 30 connects the first bush 10 and the second bush 20. In the present embodiment, the connecting portion 30 includes a fixing portion 31 for fixing the outer mounting member 11 of the first bush 10, a fixing portion 32 for fixing the mounting member 21 of the second bush 20, a fixing portion 31 and a fixing portion 32. And an axial portion 33 connecting the two together.

In the present embodiment, the connecting portion 30 extends along the axial direction L-L. More specifically, in the axial direction L-L, when the first bush 10 and the second bush 20 are fixed to the fixing portion 31 and the fixing portion 32 of the connecting portion 30 in a plan view shown in FIG. the center axis O ₁ of the inner mounting member 12, extends along a straight line (L-L line in the figure) passing through the central axis O ₂ of the attachment member 21 of the second bushing 20.

Next, the operation of the vibration control device 1 of FIG. 1 will be described.
The anti-vibration device 1 has a pair of legs 13b, and since the legs 13b are not adhered to the outer attachment member 11, the spring function can be achieved by positively bending the two legs 13b. Can be In addition, the spring characteristic is soft by adopting a configuration in which the two legs 13b are positively bent. For example, the elastic modulus along the extending direction (axial direction L-L) of the shaft portion 33 of the connecting portion 30 Becomes lower. For example, the two legs 13b are not fixed to the fixing portion 13a, and both sides in the extension direction (axial direction L-L) of the shaft portion 33 of the connecting portion 30 in plan view of FIG. 1 without the fixing portion 13a. In the case where each of the legs 13b is individually bonded to the outer mounting member 11 and connected to the outer mounting member 11, the leg 13b has the same thickness as that of the leg 13b according to the present embodiment. Spring characteristics become softer. Furthermore, the vibration damping device 1 can obtain a soft spring characteristic with a simple configuration in which only the two legs 13 b are provided on the first bush 10. As described above, according to the vibration damping device 1, it is possible to obtain soft spring characteristics with a simple configuration.

In the present embodiment, each of the two legs 13 b has an outward bent portion 13 b ₁ . By thus providing the bent portion 13b ₁ to the leg portion 13b, even within the limited interior of the outer mounting member 11 space amount that can ensure the length of the leg portion 13b, it is possible to obtain a soft spring characteristic . Also, the case of providing the bent portion 13b ₁ to the leg portion 13b, that is easily deformed at the bent portion 13b _1, more spring characteristics of the extending direction of the shaft portion 33 of the connecting portion 30 (the axial direction L-L) It can be softened.

Fixed in the present embodiment, the bent portion 13b _1, respectively, the outer mounting member side portion 13b ₂ extending from the fixed portion 13a fixed to the outer mounting member 11 outwardly to each other, which is fixed to the inner mounting member 12 connects the inner mounting member side portion 13b ₃ extending outwardly from each other from section 13c. Further, in this embodiment, the outer mounting member side portion 13b _2, and the inner mounting member side portion 13b _3, are linearly extended in plan view in FIG.

The shapes of the two legs 13b are not limited as long as they can be positively truncated. As described above, the leg 13b does not have a bent shape in plan view of FIG. 1, but has a shape in which the bent portion 13b ₁ is curved or a shape in which the entire leg 13b is curved. be able to.

  Furthermore, in the vibration damping device 1, an elastic body such as a rubber elastic body can be prevented from being interposed between the mounting member 21 and the fixing portion 32 of the connecting portion 30. In this case, as compared with a bush in which an elastic body such as a rubber elastic body is interposed between the outer attachment member and the inner attachment member, space saving and cost reduction can be achieved as much as the elastic body of the second bush 20 is omitted. And so on. In the present embodiment, the elastic member is completely eliminated by configuring the second bush 20 with only the mounting member 21.

In the present embodiment, the first bush 10, the inner peripheral surface of the outer mounting member 11 is provided with a stopper portion S _1. When the input to the vibration damping device 1 is tension, the stopper portion S ₁ contacts the inner mounting member 12 of the first bush 10 and the mounting member of the second bush 20 by contact with the inner mounting member 12 (fixing portion 13 c). Limit the expansion between 21 and. Further, in the present embodiment, the first bushing 10, as part of the fixing portion 13a, is provided a stopper portion S _2. Stopper S _2, when the input to the vibration isolating apparatus 1 is compressed by the contact inner mounting member 12 (fixing portion 13c), the inner mounting member 12 of the first bushing 10 of the second bushing 20 mounted member Restrict access between 21 and

  In addition, the connecting portion 30 can have a spring function by being made of a material having high strength and low elasticity (for example, a material such as nylon, FRP (fiber reinforced plastic), iron, etc.). Furthermore, the connecting portion 30 can also directly connect the shaft portion 33 to at least one of the first bush 10 and the second bush 20 by omitting at least one of the fixed portions 31 and 32.

FIG. 2 shows a vibration damping device 2 according to a second embodiment of the present invention. In FIG. 1, substantially the same parts as those in FIG. In the vibration damping device 2, the bent portions 13 b ₁ of the legs 13 b of the first bush 10 ′ are in non-adhesive contact with the inner peripheral surface of the outer mounting member 11. In the present embodiment, a contact surface capable of moving the leg 13b relative to the outer mounting member 11 in non-adhesive contact with the inner peripheral surface of the outer mounting member 11 in the bent portion 13b ₁ of the leg 13b. 13 d is provided. Thereby, the vibration isolation device 2 can also obtain a spring function and a soft spring characteristic by bending the two leg portions 13 b in the same manner as the vibration isolation device 1.

  Further, in the vibration damping device 2, since the two legs 13b are in non-adhesive contact with the outer mounting member 11 via the contact surface 13d, this occurs particularly when the input of the vibration damping device 1 is in compression. As compared with the vibration control device 1 of FIG. 1, the spring characteristics can be made harder by suppressing the deflection. Further, in the case where the leg portion 13 b is in non-adhesive contact with the outer attachment member 11 as in the present embodiment, the shock due to the leg portion 13 coming into contact with the outer attachment member 11 with a large input is prevented. be able to.

The above description is only one embodiment of the present invention, and various modifications are possible according to the claims. For example, the second bush 20 can be configured as a bush having an elastic body between the outer attachment member and the inner attachment member. Similarly, as the second bush 20, the first bushes 10 and 10 'can be adopted. The stopper portions S ₁ and S ₂ can be omitted at least one.

  The present invention can be applied to an anti-vibration apparatus in which at least one of the two bushes connected via the connecting part has an elastic body between the outer mounting member and the inner mounting member.

1: Vibration isolation device (first embodiment) 2: Vibration isolation device (second embodiment) 10: First bush (first embodiment) 10 ': First bush (second embodiment) Form), 11: Outer mounting member, 12: inner mounting member, 13: elastic body, 13a: fixing portion, 13b: leg, 13b ₁ : bent portion, 13b ₂ : outer mounting member side portion, 13b ₃ : inner mounting member side portion, 13c: fixed part, 13d: contact surface 20: second bushing, 21: mounting member, 30: connecting portion, 31: fixing portion, 32: fixing portion, 33: shaft portion, C _1: void C ₂ : air gap, O ₁ : central axis of inner mounting member, O ₂ : central axis of mounting member

Claims (2)

A first bush having an outer mounting member, an inner mounting member connected to any one of the vibration generating portion and the vibration receiving portion, and an elastic body connecting the outer mounting member and the inner mounting member;
A second bush having a mounting member connected to any one of the vibration generating unit and the vibration receiving unit;
A connecting portion connecting the first bush and the second bush;
The elastic body, possess a fixed portion which is adhered to the outer mounting member, and a pair of leg portion connecting the inner mounting member and the fixing portion,
The leg portion has an outward bent portion, and the bent portion includes an outer attachment member side portion extending outward from the fixing portion, and an inner attachment member extending outward from the inner attachment member. It is connected to the side part,
Furthermore, the said bending part is non-adhesively spaced apart or in contact with the said outer side attachment member , The anti-vibration apparatus characterized by the above-mentioned. The anti-vibration device according to claim 1, wherein an elastic body does not intervene between the mounting member and the connecting portion.

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