JP4333316B2 - Anti-vibration support device - Google Patents

Description

  The present invention relates to an anti-vibration support device that suppresses vibration from a vibration body such as a power unit to a support body such as a vehicle body side member.

Conventionally, as a technique for suppressing vibration transmitted from a vibrating body to a support body, there is a technique related to an active vibration damper disclosed in Patent Document 1.
In this technique, as shown in FIG. 14, a power unit 101 including an engine and a transmission is elastically vibration-proof supported on a body 102 via a plurality of engine mounts 110, so that the power unit 101 is supported by the engine mount 110. The transmission vibration from the body to the body 102 is reduced.
In the engine mount 110, a first mounting bracket 111 and a second mounting bracket 112 that are spaced apart in the mount central axis direction are elastically connected by a mount elastic body 113, and the first mounting bracket 111 is connected to the power unit 101. The second mounting bracket 112 is attached to the body 102 side while being attached to the bracket 103 on the side.

The second mounting bracket 112 has a bottomed cylindrical shape with an upper opening. The mount elastic body 113 has a thick tapered cylindrical shape that extends from the center portion of the lower surface of the first mounting bracket 111 toward the opening of the second mounting bracket 112 while gradually increasing in diameter vertically downward. Yes. A hollow internal space 114 is formed between the second mounting bracket 112 and the mount elastic body 113. In the internal space 114, mass brackets 117 fixed by fixing brackets 115 and 116 provided on the second mounting bracket 112 and the mount elastic body 113 are arranged. Although not shown, an actuator mechanism that applies an excitation force is provided between the fixing bracket 115 and the mass bracket 117 provided on the second mounting bracket 112.
Such an active vibration damper can suppress vibration from the power unit 101 to the body 102. At this time, vibration transmission at a predetermined frequency is suppressed according to the mass of the mass fitting 117.
Japanese Patent Laid-Open No. 2001-200885

The active vibration damper has a configuration in which the mass metal fitting 117 is arranged inside the mount elastic body 113, and the conventional device has a structure in which the mass member is arranged inside the elastic member in this way. .
However, in such a structure, the size (mass) of the mass member is restricted by the shape of the elastic member. This limits the frequency band that can be controlled.
Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a vibration-proof support device having a high degree of freedom in selecting the mass of the mass member, in particular, a high degree of freedom in increasing the mass.

An anti-vibration support device according to the present invention is provided between a vibrating body and a support body, and includes a plurality of elastic support members that are fixed to either the vibrating body or the support body. member, and at least one elastic support member for supporting said vibrating body, and at least one elastic support member is fixed to the support, is composed of, it holds the previous SL plurality of elastic support members therein comprising a holding member which constitutes the mass member Te.
The vibration isolating support device according to the present invention includes a support center of an elastic support member that supports the vibrating body and a fixed center of an elastic support member that is fixed to the support body among the plurality of elastic support members. The plurality of elastic support members are arranged on a straight line so as to be equidistant from each other while arranging the elastic support members so as to coincide with each other.

  According to the present invention, since the holding member as the mass member holds the elastic support member inside, the degree of freedom of the shape of the holding member can be increased, and thereby the degree of freedom of selection of the mass of the holding member. Can be high.

The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described in detail with reference to the drawings.
1 and 2 show a vibration isolating support apparatus according to a first embodiment to which the present invention is applied.
As shown in FIG. 1, a substantially rectangular main body 2 having a substantially rectangular parallelepiped shape includes three vibration isolators 3, 4, and 5. The 1st thru | or 3rd vibration isolator 3,4,5 has comprised the substantially columnar shape, and is arrange | positioned so that the main body part 2 may penetrate from the one side surface to the other side surface on the opposite side. Here, the main body 2 constitutes a holding member that is a mass member, and the vibration isolators 3, 4, and 5 constitute elastic support members.

As shown in FIG. 2, the first to third vibration isolator 3, 4, 5 are arranged on a straight line and at equal intervals. Specifically, the first to third vibration isolators 3, 4 and 5 have their central axes (or support shafts) O parallel to each other, and the distances between the central axes O are equally spaced. It is arranged to be.
The first to third vibration isolator 3, 4, 5 has a structure in which the vibration isolating member 13 is sandwiched between the inner cylinder 11 and the outer cylinder 12. The vibration isolation member 13 is formed of an elastic material. For example, three holes are formed in the main body 2, and the first to third vibration isolation bodies 3, 4, 5 are inserted and fixed in the respective holes of the main body 2.

  In such an anti-vibration support device, the first and third anti-vibration bodies 3 and 5 located on both sides of the main body 2 are fixed to a support body or vibration body (not shown). And when it fixes to a support body with the 1st and 3rd anti-vibration bodies 3 and 5, the 2nd anti-vibration body located between the 1st and 3rd anti-vibration bodies 3 and 5 When the body 4 supports a vibration body (not shown) and the first and third vibration isolation bodies 3 and 5 support the vibration body, the second vibration isolation body 4 is fixed to the support body (not shown). Has been. Here, the vibrating body or the support body is fixed to the inner cylinders 11 of the first to third vibration isolator bodies 3, 4, 5 by bolts or the like. The vibrating body is a power unit including an engine and a transmission, for example, and the support is a vehicle body side member.

  As described above, the first to third anti-vibration bodies 3, 4 and 5 are arranged in the main body 2 on a straight line and at equal intervals as shown in FIG. Yes. Therefore, for example, considering the case where the first and third vibration isolator 3 and 5 are fixed to the support and the second vibration isolator 2 supports the vibration body, the first vibration isolator 3. There is a fixed center with the support at an intermediate position between the second vibration isolator 5 and the third vibration isolator 5, and a support center of the vibrator is present on the central axis O of the second vibration isolator 4. That is, the fixed center with the support body and the support center of the vibrating body coincide.

The anti-vibration support device having the above-described configuration has the first to third anti-vibration bodies 3, 4, and 5 that absorb vibration from the vibration body to the support body, so that the vibration from the vibration body to the support body Transmission is suppressed. Furthermore, vibration transmission at a predetermined frequency is suppressed because the main body 2 has a predetermined shape, that is, a predetermined mass.
3 to 6 show a state in which the vibration isolating support device 1 supports a power unit 102 as a vibrating body.
FIG. 3 is a perspective view, and FIG. 4 shows details of the vicinity of the support portion 102a to which the anti-vibration support device 1 is attached in the power unit 102. FIG. FIG. 5 is a front view, and FIG. 6 is a side view showing an AA cross section in FIG.
As shown in FIG. 3, both sides of the power unit 102 are supported on a support body (vehicle body side member) 101 via each anti-vibration support device 1, and in each anti-vibration support device 1, first and third The support body 101 is attached to the vibration isolation bodies 3 and 5, and the power unit 102 is attached to the second vibration isolation body 4.

  Specifically, as shown in FIGS. 5 and 6, the anti-vibration support device 1 is attached to the fixed portion 101 so that the first to third anti-vibration bodies 3, 4, and 5 are aligned in the horizontal direction. Here, a fixing bolt 111 is inserted into the first and third vibration isolator 3, 5 (inner cylinder 11), and one end of the fixing bolt 111 is directly attached to the support body 101, and the fixing bolt is fixed. The other end of 111 is attached to a fixing stay 112 fixed to the support 101. Further, the fixing stay 112 is fixed to the support body 101 with fixing bolts 113. The anti-vibration support device 1 supports the power unit 102 by inserting a fixing shaft 102b provided on the support portion 102a into the second anti-vibration body 2 (inner cylinder 11).

Next, operations and effects in the first embodiment will be described.
As described above, the first to third vibration isolator 3, 4, 5 is attached so as to penetrate the main body 2. That is, the main body portion 2 so as to cover the outer peripheral portions of the first to third vibration isolators 3, 4, 5 or to hold the first to third vibration isolator 3, 4, 5 inside. Is formed. Thereby, the design freedom of the shape of the main-body part 2 becomes high. Therefore, since the design freedom of the shape of the main body 2 as the mass member is high, the resonance frequency of the vibration isolating support device can be easily changed. For example, since the shape of the main body 2 can be increased, that is, the mass of the main body 2 can be increased, the resonance frequency of the vibration isolating support device can be reduced. Thereby, vibration transmission from the vibrating body to the support body can be suppressed in a low frequency range.

FIG. 7 is a characteristic diagram showing the effect. As shown in FIG. 7, the resonance frequency can be shifted to the low frequency side, so that the transmission is performed in the frequency region (region of the conventional part) where the transmission force from the vibrating body to the support body has been large so far. The power can be reduced.
Further, since the vibration isolator 3, 4 and 5 are fixed to the vibration body and the support body, the layout properties of the vibration isolator 3, 4 and 5 can be improved. Further, the elastic modulus of the vibration isolators 3, 4, and 5 can be reduced.

Further, as described above, the first to third vibration isolators 3, 4, and 5 are arranged on a straight line and at equal intervals. That is, for example, such that the fixed center of the first and third vibration isolator 3 and 5 fixed to the support body and the support center of the second vibration isolator 2 that supports the vibration body coincide with each other. Anti-vibration bodies 3, 4 and 5 are arranged.
Thus, vibration isolation support system, without oscillating in two directions Cartesian with respect to the vibration direction of the vibrating body, it is possible to vibration damping the vibration of the vibrating body. That is, the anti-vibration support device, specifically, the main body 2 can reliably act on the anti-vibration effect only in the vibration direction of the vibrating body and supports the transmission force (damped transmission force) only in the vibration direction. Come to the body.

  For example, in the case where the support body side is attached to the first and third vibration isolator 3 and 5 and the vibration body is attached to the second vibration isolator 4, the first to third as shown in FIG. When vibration isolators 3, 4 and 5 are arranged in a direction perpendicular to the paper surface, vibration from a vibration body (not shown) is input in a direction parallel to the second vibration body 4 (perpendicular to the paper surface). In some cases, the first to third vibration isolators 3, 4 and 5 are arranged in a straight line and at equal intervals, so that the prevention support device has two other directions, that is, the vertical direction in FIG. In addition, vibrations input in the parallel direction can be prevented without vibration in the left-right direction.

  For example, only covering the outer periphery of the first to third vibration isolator 3, 4, 5 with the main body 2, or the first to third vibration isolator 3, 4, 5 inside the main body 2. If only focusing on holding, the first to third vibration isolators 3, 4 and 5 may be arranged in any manner. However, if the first to third vibration isolation bodies 3, 4 and 5 are arbitrarily arranged, the vibration isolation support device will vibrate in directions other than the vibration direction of the vibration body.

However, as described above, the first to third isolator 3,4,5 a straight line, and by arranging at regular intervals, respectively, in two directions Cartesian with respect to the vibration direction of the vibrating body The vibration of the vibrating body can be prevented without vibration.
Next, a second embodiment will be described.
In the first embodiment, the main body 2 is a substantially rectangular parallelepiped, and is straight to the main body 2 and the first to third vibration isolators 3 are arranged at equal intervals. , 4 and 5 are described. As shown in FIG. 8, the second embodiment is an anti-vibration support device provided with first to fourth anti-vibration bodies 23, 24, 25, and 26 on a substantially square rectangular parallelepiped 22.

The structure of the first to fourth vibration isolating bodies 23, 24, 25, and 26 of the vibration isolating support device of the second embodiment is the same as that of the vibration isolating support 3 of the vibration isolating support device of the first embodiment. , 4 and 5 are the same. In this prevention support device, four holes are formed in the main body 22, and the first to fourth vibration isolation bodies 23, 24, 25, and 26 are inserted and fixed in the respective holes.
Here, the first straight line X1 connecting the first vibration isolator 23 and the second vibration isolator 24, and the second straight line connecting the third vibration isolator 25 and the fourth vibration isolator 26. These anti-vibration bodies 23, 24, 25, and 26 are arranged so that X2 intersects at each intermediate position (intersection XO). In other words, the third and fourth vibration isolators 25 and 26 are arranged so as to be symmetric with respect to the first straight line X1 connecting the first vibration isolator 23 and the second vibration isolator 24. . Further, the first to fourth vibration isolator 23, 24, 25, 26 are arranged so that their central axes (or support axes) O are parallel.

The first and second vibration isolator bodies 23 and 24 are fixed to a support body or vibration body (not shown). When the first and second vibration isolation bodies 23 and 24 are fixed to the support body, the third and fourth vibration isolation bodies 25 and 26 support the vibration body (not shown), and When the vibrating body is supported by the second vibration isolator 23 and 24, the third and fourth vibration isolator 25 and 26 are fixed to a support body (not shown).
Therefore, for example, considering the case where the support body is supported by the first and second vibration isolation bodies 23, 24 and the vibration body is supported by the third and fourth vibration isolation bodies 25, 26, the first The support center of the support exists at an intermediate position between the vibration isolator 23 and the second vibration isolator 24, and the vibration body is located at an intermediate position between the third vibration isolator 25 and the fourth vibration isolator 26. There will be a support center. At this time, the fixed center with the support and the support center of the vibrating body coincide.

Next, operations and effects in the second embodiment will be described.
Similarly, in the second embodiment, the operation and effect of the first embodiment can be obtained.
That is, as described above, the first to fourth vibration isolator 23, 24, 25, 26 is attached so as to penetrate the main body 22. That is, the main body 22 is formed so as to cover the outer peripheral portions of the first to fourth vibration isolator 23, 24, 25, 26. Thereby, the design freedom of the shape of the main-body part 21 becomes high. Therefore, since the design freedom of the shape of the main body portion 22 as the mass member is high, the resonance frequency of the vibration isolating support device can be easily changed. For example, since the shape of the main body portion 22 can be increased, that is, the mass of the main body portion 22 can be increased, the resonance frequency of the vibration isolating support device can be reduced. Thereby, vibration transmission from the vibrating body to the support body can be suppressed in a low frequency range.

Moreover, since the vibration isolator 23, 24, 25, 26 is fixed to the vibration body and the support body, the layout of the vibration isolator 23, 24, 25, 26 can be improved. Further, the elastic coefficient of the vibration isolator 23, 24, 25, 26 can be reduced.
Further, as described above, the first straight line X1 connecting the first vibration isolator 23 and the second vibration isolator 24, and the third vibration isolator 25 and the fourth vibration isolator 26 are connected. These vibration isolators 23, 24, 25, and 26 are arranged so that the second straight line X2 intersects at each intermediate position (intersection XO).

Thus, vibration isolation support system, without oscillating in two directions Cartesian with respect to the vibration direction of the vibrating body, it is possible to vibration damping the vibration of the vibrating body. That is, the anti-vibration support device, specifically, the main body 22 can reliably exert the anti-vibration effect only in the vibration direction of the vibrating body.
For example, in the first embodiment, the three vibration isolators 3, 4, and 5 are arranged on a straight line so that each is equally spaced. However, there are cases where the three vibration isolators cannot be arranged on such a straight line and at equal intervals. For example, assuming that the structure of the anti-vibration support device of FIG. 8 is a structure including first, second and third anti-vibration bodies 23, 24 and 25, the three anti-vibration bodies 23, 24 and 25 are These are not located on a straight line and are not located at regular intervals. For example, there may be a case where the vibration-proof support device side has such a structure due to the structure of the vibrating body or the support. If vibration isolation support system has become such a structure, vibration-damping support device may be in two directions Cartesian with respect to the vibration direction of the vibrating body will vibrate.

On the other hand, by applying the present invention, the first straight line X1 connecting the first vibration isolator 23 and the second vibration isolator 24 is symmetrical with the third vibration isolator 25. By adopting a structure in which the fourth vibration isolator 26 is disposed in the anti-vibration support device, the anti-vibration support device includes only three anti-vibration bodies 3, 4, and 5 as in the first embodiment. The same effect as the support device can be obtained.
The embodiment of the present invention has been described above. However, the present invention is not limited to being realized as the above-described embodiment.

That is, in the first embodiment, the case where the main body portion 2 includes the first to third vibration isolator 3, 4, 5 is described. However, it goes without saying that the present invention is not limited to this. As shown in FIG. 9, you may comprise the 1st thru | or 3rd vibration isolator 33,34,35 so that it may become a separate member.
As shown in FIG. 9, a second vibration isolator 34 is provided on a main body 32 that is a substantially rectangular parallelepiped. Further, the first and third vibration isolator 33 and 35 have a structure in which the vibration isolating member 43 is sandwiched between the inner cylinder 41 and the outer cylinder 42, but the both ends 42 a and 42 a of the outer cylinder 42 are attached to the main body 43. It is fixed with bolts 44. In this way, the first to third vibration isolator 33, 34, 35 has a detachable structure.

Further, how to attach the vibration isolating support device to the support or how to support the vibration body by the vibration isolating support device is not limited to the configuration shown in FIGS. 3 to 6.
10 and 11 show another embodiment. 10 is a front view, and FIG. 11 is a side view showing a cross section taken along the line BB in FIG.
Specifically, as shown in FIGS. 10 and 11, the anti-vibration support device 1 is attached to the fixed portion 121 so that the first to third anti-vibration bodies 3, 4, and 5 are aligned in the horizontal direction. Here, the fixing bolt 111 is inserted into the first and third vibration isolator 3, 5 (inner cylinder 11), and both ends of the fixing bolt 111 are fixed to the support 121. Attach to. The fixing stay 112 is fixed to the lower surface of the support 121 with fixing bolts 113. Further, a stay portion 122b is provided at one end of the support portion 122a of the vibrating body 122. The fixing bolt 111 is inserted through the second vibration isolator 2 (inner cylinder 11), and the stay portions 122 b are attached to both ends of the fixing bolt 111.

Moreover, the form as shown in FIG.12 and FIG.13 may be sufficient. 12 is a front view, and FIG. 13 is a side view showing a cross section taken along the line CC in FIG.
Specifically, as shown in FIGS. 12 and 13, the anti-vibration support device 1 is fixed to the fixed portion 131 so that the first to third anti-vibration bodies 3, 4, 5 are aligned in the vertical direction (vertical direction). Attach to. Here, the fixing bolt 111 is inserted into the first and third vibration isolator 3, 5 (inner cylinder 11), and both ends of the fixing bolt 111 are fixed to the support 131. Attach to. The fixing stay 112 is fixed to the lateral side surface of the support 121 with fixing bolts 113. Further, a stay portion 132b is provided at one end of the support portion 132a of the vibrating body 132. The fixing bolt 111 is inserted through the second vibration isolator 2 (inner cylinder 11), and the stay portion 132 b is attached to both ends of the fixing bolt 111.

  In the first embodiment, the anti-vibration support device includes the three anti-vibration bodies 3, 4, and 5. In the second embodiment, the anti-vibration support device includes the four anti-vibration support devices. The case where the vibrators 23, 24, 25, and 26 are provided has been described. However, the number of anti-vibration bodies that are anti-vibration support members is not limited to these numbers. That is, as long as the same effect is obtained, that is, the vibration isolator is arranged so that the support center of the vibration isolator supporting the vibration body coincides with the support center of the vibration isolator fixed to the support. As long as the anti-vibration support device has a different number of anti-vibration bodies.

  For example, you may arrange | position four vibration isolators in the main-body part 2 on a straight line so that each may become equal intervals. In this case, for example, the support body is supported by the two outer vibration isolation bodies, and the vibration body is supported by the two inner vibration isolation bodies. Thereby, the fixed center (the intermediate position of the two outer vibration isolator bodies) of the two outer vibration isolator bodies that support the support body and the two inner vibration isolator bodies that support the vibration body. The support center (intermediate position between the two inner vibration isolator) coincides.

It is a perspective view which shows the vibration isolating support apparatus of the 1st Embodiment of this invention. It is a top view which shows the said vibration proof support apparatus. It is a perspective view which shows the example of mounting | wearing of the said vibration proof support apparatus to a power unit. It is a figure which shows the mounting part vicinity of the vibration isolating support apparatus in the power unit of the mounting example of the said FIG. It is a front view which shows the example of mounting | wearing of the said vibration proof support apparatus. It is sectional drawing which shows the arrow AA cross section of the said FIG. It is a characteristic view used for description of the effect of the present invention. It is a top view which shows the vibration isolating support apparatus of the 2nd Embodiment of this invention. It is a top view which shows the other structure of the vibration isolating support apparatus of the said 1st Embodiment. It is a front view which shows the other example of mounting | wearing of the vibration isolating support apparatus of the said 1st Embodiment. It is sectional drawing which shows the arrow BB cross section of the said FIG. It is a front view which shows the further example of mounting | wearing of the vibration isolating support apparatus of the said 1st Embodiment. It is sectional drawing which shows the arrow CC cross section of the said FIG. It is a front view which shows the structure of the conventional anti-vibration support apparatus (active vibration damper).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-vibration support apparatus 2,22 Main-body part 3,4,5,23,24,25,26 Anti-vibration body 11 Inner cylinder 12 Outer cylinder 13 Anti-vibration member

Claims (3)

A plurality of elastic support members interposed between the vibrating body and the support body and fixed to either the vibrating body or the support body are provided,
The plurality of elastic support members include at least one elastic support member that supports the vibrating body, and at least one elastic support member that is fixed to the support.
And a holding member which constitutes the mass member holds the previous SL plurality of elastic support members therein,
Among the plurality of elastic support members, the elastic support member is arranged so that the support center of the elastic support member that supports the vibrating body and the fixed center of the elastic support member fixed to the support body coincide with each other. The anti-vibration support device is characterized in that the plurality of elastic support members are arranged on a straight line so as to be equidistant from each other . The plurality of elastic support members are three elastic support members, fixed to the vibrating body or the support body by elastic support members on both sides, and fixed to the support body or the vibration body by a central elastic support member. The anti-vibration support device according to claim 1 . A plurality of elastic support members interposed between the vibrating body and the support body and fixed to either the vibrating body or the support body are provided,
The plurality of elastic support members include at least one elastic support member that supports the vibrating body, and at least one elastic support member that is fixed to the support.
A holding member that holds the plurality of elastic support members inside to form a mass member;
The plurality of elastic support members are four elastic support members, the vibrating body is supported by two elastic support members of the four elastic support members, and of the four elastic support members, It is fixed to the support with the other two elastic support members,
An elastic support member for supporting the vibrator by arranging two elastic support members fixed to the support so as to be symmetrical with respect to a straight line connecting the two elastic support members for supporting the vibrator. of a support center, the proof that the fixed center of the support elastic support member fixed to the disposing the four elastic support members to match you wherein isolating support device.

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