JP2004028184A - Bracket for mounting vibration isolator and vibration isolator with bracket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bracket for mounting a vibration isolator improving the durability. <P>SOLUTION: This metal bracket is used for mounting the vibration isolator for mounting the vibration isolator 2, which is constituted by connecting a first mount device 5 to a second mount device 6 by a rubber elastic body 7, on a vibrating body 3. The metal used is aluminum and this bracket is provided with a first mount part to be mounted on the first mount device 6 and a second mount part to be mounted on the vibrating body. The first mount part is provided with a fitting hole 34 for internally fitting a projecting end part 14 of the first mount device 5 projected oppositely to the second mount device 6 in the other side of a rubber elastic body 7 and a bore hole is formed between the first mount part and the second mount part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a metal vibration isolator mounting bracket for mounting a vibration isolator formed by connecting a first fixture and a second fixture with a rubber-like elastic body to a vibrator, and an anti-vibration provided with the bracket. It relates to a vibration device.
[0002]
[Prior art]
Conventionally, the above-mentioned bracket for mounting the vibration isolator (hereinafter abbreviated as "bracket") is provided on a first mounting portion for mounting to a first mounting member of the vibration isolator and a lower surface of a transmission (an example of a vibration body) of an automobile. A second mounting portion to be mounted, wherein the first mounting portion is formed by forming a bolt insertion hole in a flat mounting surface portion that abuts an upper end surface of a protruding end of the first mounting tool protruding upward. there were.
Then, the upper end surface of the protruding end of the first mounting tool is brought into contact with the mounting surface, and the mounting bolt inserted through the bolt insertion hole is screwed into the female screw portion formed on the protruding end, and the bracket is attached to the vibration isolator. Was attached to.
Incidentally, in the vibration isolator, the second attachment is attached to the member on the vehicle body side of the automobile, and in this state, the vibration on the transmission side is attenuated.
[0003]
[Problems to be solved by the invention]
As described above, in the structure in which the upper end surface of the protruding end of the first mounting member is brought into contact with the flat mounting surface portion of the bracket, for example, a light collision of an automobile causes the first mounting member of the vibration isolator to be mounted on a transmission or the like. When the position is changed in the front-rear direction together with the bracket and received by the stopper portion on the second mounting member side, a large moment about the horizontal axis passing through the center of the upper end surface is applied to the mounting surface portion, and the mounting surface portion falls down and is deformed. There was room for improvement in terms of ease and durability.
[0004]
An object of the present invention is to provide a vibration isolator mounting bracket capable of improving durability and a vibration isolator provided with the bracket.
[0005]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a metal vibration isolator mounting bracket for mounting a vibration isolator configured by connecting a first mounting tool and a second mounting tool with a rubber-like elastic body to the vibration body. hand,
The metal is aluminum, and a first attachment portion attached to the first attachment and a second attachment portion attached to the vibrating body are provided, and the opposite side of the rubber-like elastic body from the second attachment is provided. A fitting hole for internally fitting the protruding end of the first mounting tool protruding into the first mounting part, and forming a hole between the first mounting part and the second mounting part. It is in.
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, a bolt insertion hole through which a mounting bolt is inserted is formed in the first mounting portion, and the mounting hole is formed in a projecting end of the first mounting tool. The female screw portion for screwing the bolt is formed in a posture along the axial direction.
[0007]
The structure of the invention according to claim 3 is that, in the structure of the invention according to claim 1 or 2, the second mounting portions are arranged on both sides of the first mounting portion.
[0008]
According to a fourth aspect of the present invention, in the configuration according to any one of the first, second, and third aspects, the vibration isolator is formed by attaching the rubber-like elastic body to the second mounting member formed in a cylindrical shape. A diaphragm that forms a liquid chamber between the partition, a partition that divides the liquid chamber into a first liquid chamber and a second liquid chamber, and an orifice that communicates the first liquid chamber and the second liquid chamber. The point is that it is provided and is configured as a liquid filling type.
[0009]
According to a fifth aspect of the present invention, there is provided a vibration isolator comprising the vibration isolator according to the first or fourth aspect and the bracket for mounting the vibration isolator according to any one of the first to fourth aspects. is there.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a liquid-filled vibration damper 2 for an FR vehicle, which is mounted on a member 1 on the vehicle body side, is mounted on a transmission 3 as a vibration body above the vibration damper mounting bracket 4 (hereinafter, referred to as a "bracket"). 4 ").
[0011]
The vibration isolator 2 and the bracket 4 constitute a liquid-filled type vibration isolator. The vibration isolator 2 will be described. As shown in FIGS. And the cylindrical second mounting member 6 for the member 1 are connected by a rubber-like elastic body 7 (vibration-proof base) having a truncated cone shape. A partially spherical diaphragm 9 that forms the chamber 8, a partition 33 that partitions the liquid chamber 8 into a first liquid chamber 10 and a second liquid chamber 11, and a first liquid chamber 10 and a second liquid chamber 11. An orifice 12 for communication is provided, and a liquid is sealed in both liquid chambers 10 and 11.
[0012]
A flange-shaped stopper portion 13 projecting radially outward is provided at the center of the first mounting member 5 in the axial direction, and the rubber-like elastic body 7 is provided on the outer peripheral surface and upper surface of the stopper portion 13. Is formed. Further, the upper end of the first mounting member 5 is formed as a round bar-shaped protruding end portion 14 protruding on the opposite side to the second mounting member 6 with the rubber-like elastic body 7 interposed therebetween, and the shaft of the protruding end portion 14 is formed. A female thread 16 for the mounting bolt 15 is formed in the center. The lower portion of the first attachment 5 below the stopper portion 13 is embedded in the rubber-like elastic body 7, and the flow of the liquid in the first liquid chamber 10 is provided at the lower end of the lower portion. Is fixed by bolts 30.
[0013]
Each of the second attachments 6 is composed of a cylindrical lower body metal fitting 17 and an upper stopper metal fitting 18, and the lower end side of the rubber-like elastic body 7 is connected between the two. Specifically, the lower opening end of the stopper fitting 18 and the annular auxiliary fitting 19 whose inner peripheral side is buried in the lower end of the rubber-like elastic body 7 are wrapped from the outside by the upper opening end of the main body fitting 17. At the same time, the three are swaged together and fixed.
[0014]
The stopper fitting 18 surrounds the peripheral portion of the portion 13 to be stopped of the first fixture 5 at a predetermined interval. The upper end portion of the stopper fitting 18 is bent inward to form an inner flange-shaped stopper portion 22, which is provided between the stopper portion 13 of the first fixture 5 and the bracket 4 located above the stopper portion 13. It is located in. In addition, a ring-shaped stopper rubber 23 is provided on the upper surface of the stopper portion 22 to prevent metal from coming into contact with the bracket 4.
[0015]
Accordingly, when the first mounting member 5 rises significantly due to the vibration, the stopper-stopped rubber portion 21 comes into contact with the stopper portion 22 of the stopper fitting 18, and the stopper-stopped portion 13 is received by the stopper portion 22. The bracket 4 comes into contact with the stopper rubber 23 and is received by the stopper portion 22. When the first attachment 5 of the vibration isolator 2 is moved in the front-rear direction with respect to the vehicle body member 1 and the second attachment 6 together with the transmission 3 and the bracket 4 due to a light collision of the vehicle, the first attachment 5 is The stopper rubber portion 21 comes into contact with the stopper fitting 18 and the stopper 13 is received by the stopper fitting 18 (in FIG. 3, the left-right direction on the paper is the front-rear direction of the vehicle).
[0016]
The lower body fitting 17 and the stopper fitting 18 on the lower side of the second fixture 6 are fixed by caulking except at two places facing each other in the radial direction, and the lower end of the stopper fitting 18 is fixed at a place that is not fixed by caulking. A mounting surface 24 for the member 1 on the vehicle body side is formed in the extending portion, and a downward bolt 25 is press-fitted and fixed to the mounting surface 24. A nut 40 is screwed onto the bolt 25 to fix the vibration isolator 2 to the member 1 on the vehicle body side.
[0017]
The diaphragm 9 is located on the lower end side of the main body fitting 17. The partitioning part 33 is located at the central part in the axial center direction of the main body fitting 17, and includes an elastic film 26 as a valve member that is reciprocally displaced and a pair of upper and lower lattices 27 and 28 that restrict the movement of the elastic film 26. Become. The orifice 12 is located on the outer peripheral side of the partition 33.
[0018]
The liquid-filled vibration isolator 2 having the above-described structure attenuates vibration due to a liquid flow effect between the first liquid chamber 10 and the second liquid chamber 11.
[0019]
Next, the bracket 4 will be described. The bracket 4 is made of aluminum, and is formed by a die-casting method in the shape of a “<” in plan view (the fitting round hole 34, the first bolt insertion hole 36, and the second bolt insertion hole 26 are also formed by the die-casting method). It is). A first mounting portion 31 for mounting to the first mounting tool 5 is provided at a central portion in the longitudinal direction, and a second mounting portion 32 for mounting to the transmission 3 is provided at both ends.
[0020]
The first mounting portion 31 has an upper portion at the center in the longitudinal direction recessed in a round hole shape, and a lower portion has a fitting round hole 34 into which the protruding end portion 14 of the first mounting tool 5 is fitted. In addition, a first bolt insertion hole 36 having a diameter smaller than that of the fitting round hole 34 and through which the mounting bolt 16 is inserted is provided concentrically with the fitting round hole 34 in the mounting surface portion 38 which is an intermediate portion.
[0021]
That is, the protruding end portion 14 is fitted into the fitting round hole 34, and the upper end surface of the protruding end portion 14 is brought into contact with the lower surface of the mounting surface portion 38, and the head is inserted into the first bolt insertion hole 36 of the mounting surface portion 38 from above. The bracket 4 is mounted on the first mounting tool 5 by inserting a mounting bolt 16 with a part and screwing it into the female screw portion 16 on the protruding end 14 side. In this mounting state, the head of the mounting bolt 16 does not protrude from the upper surface of the bracket 4, so that interference between the transmission 3 and the mounting bolt 16 can be avoided. The second mounting portion 32 is formed by providing stepped second bolt insertion holes 26 at both ends of the bracket 4.
[0022]
Since the bracket 4 is shaped like a square, the first bolt insertion hole 36 and the fitting round hole 34 of the first mounting portion 31 are displaced from the straight line connecting the two second bolt insertion holes 26. are doing. Accordingly, the distance between the second bolt insertion hole 26 and the outer peripheral surface of the main body bracket 17 can be set to a predetermined length or more without increasing the distance between the two second bolt insertion holes 26, and the mounting bolt 16 can be mounted. A work space for tightening can be secured.
[0023]
A first hole 35 is formed between the first bolt insertion hole 36 of the first attachment portion 31 and both second bolt insertion holes 26 of the second attachment portion 32, and a bracket between the two second bolt insertion holes 26 is formed. The portion 37 is located at the same position as the mounting surface portion 38 of the first mounting portion 31 in the vertical direction, and is recessed from both the vertical direction so as to have substantially the same thickness. Around the fitting round hole 34 and around the head receiving space of the mounting bolt above the mounting surface 38 are formed in a round boss shape.
[0024]
The hole 35 has a substantially isosceles triangular shape with each corner having an R-shaped curve, and the bottom side is located on the second attachment portion 32 side and the top portion is located on the first attachment portion 31 side. The depth is about half the height (thickness) of the bracket 4.
[0025]
For example, when the vehicle is slightly impacted and the position of the first mounting tool 5 is changed in the front-rear direction together with the bracket 4 and the stopper 13 of the first mounting tool 5 is received by the stopper fitting 18, the upper end of the projecting end 14 Although a large moment about the horizontal axis passing through the center of the end surface is applied to the mounting surface portion 38, according to the above structure, the protruding end portion 14 of the first mounting tool 5 is fitted into the fitting round hole 34 of the bracket 4 internally. Since the mounting surface 38 is supported by the side wall of the fitting round hole 34, the mounting surface 38 can be prevented from falling down due to a moment.
[0026]
In such a structure in which the fitting round hole 34 is provided, since the depth of the fitting round hole 34 must be ensured, there is a problem that the thickness of the bracket 4 is increased and the natural frequency of the bracket 4 is reduced. Conceivable. In particular, the weight of the bracket 4 made of iron increases, and the natural frequency tends to decrease. On the other hand, the bracket 4 of the present invention is made of aluminum to reduce the weight, and furthermore, the first bolt insertion hole 36 of the first attachment portion 31 and the two second bolt insertion holes of the second attachment portion 32. 26, the bracket portion 37 between the second bolt insertion holes 26 is recessed from both the upper and lower directions, so that the strength of the first mounting portion 31 and the second mounting portion 32 is ensured. Despite the structure, the weight can be further reduced and the natural frequency can be increased.
[0027]
The natural frequency of the bracket 4 in the liquid filling type vibration damping device having the above structure was measured. The main numerical values such as the size of the bracket 4 of the embodiment are as follows (see FIGS. 4, 5, and 6).
[0028]
The distance A between the two second bolt insertion holes 26 is 110 mm, the distance B between the straight line L connecting the two second bolt insertion holes 26 and the first bolt insertion hole 36 of the first mounting portion 31 is 25 mm, The diameter C is 36 mm, the thickness D is 4 mm, the height dimension E (thickness) of the bracket 4 is 20 mm, the diameter F of the fitting round hole 34 is 24 mm, the depth G is 7 mm, and the diameter of the first bolt insertion hole 36. H is 10.5 mm, the diameter I of the large diameter hole of the second bolt insertion hole 26 is 28 mm, the depth J is 12 mm, and the diameter K of the small diameter hole is 10.5 mm.
[0029]
The hole 35 has a substantially isosceles triangle shape with each corner having an R-shaped curve. The length M of the base is about 17 mm, the height N is about 21 mm, and the depth O is 9.5 mm. The thickness P of the bracket portion 37 between the two second bolt insertion holes 26 is 4 mm.
[0030]
As a comparative example, a bracket in which the hole 35 was not formed (the structure and dimensions of other parts were the same as in the above-described embodiment) was manufactured. And the natural frequency was measured about each bracket 4 of an Example and a comparative example. The measurement is carried out with an impact hammer on the top of the bracket 4 (the top of the bracket 4 in the shape of a square, that is, the top of an isosceles triangle) with the first mounting portion 31 and the second mounting portion fixed with mounting bolts. An impact was applied from above, and the vibration of that portion was measured with an accelerometer.
As a result, the comparative example was less than 1000 Hz and did not satisfy the requirements, but the example was 1000 Hz or more, and the required characteristics could be sufficiently satisfied.
[0031]
[Another embodiment]
The present invention can be applied to a bracket for mounting a vibration isolator of a vibration isolator other than the liquid-filled type.
[0032]
The present invention has a structure in which a mounting bolt is projected from the protruding end portion 14 of the first mounting tool 5, the mounting bolt is inserted into the first bolt insertion hole 35, and a nut is screwed into a tip of the mounting bolt. Can also be applied.
The hole 35 may be a through hole.
The vibrating body may be a device other than an automobile transmission.
[0033]
【The invention's effect】
According to the configuration of the first aspect, it is possible to provide a bracket for mounting a vibration isolator, which can improve the durability and can increase the natural frequency.
[0034]
According to the configuration of the second aspect, the mounting bolt is inserted into the bolt insertion hole formed in the first mounting portion, and the mounting bolt is screwed into the female screw portion formed on the protruding end portion of the first mounting tool, so that the bracket is formed. Since the bracket is attached to the first fixture, the bracket can be securely attached and fixed to the first fixture.
[0035]
According to the configuration of the third aspect, since the second mounting portion is disposed on each side of the first mounting portion, it is possible to easily support the vibration body stably on the vibration isolator.
[0036]
According to the configuration of claim 4, the vibration isolator includes a diaphragm that forms a liquid chamber between the second mounting member formed in a cylindrical shape and a rubber-like elastic body, and a liquid chamber that is formed by a first liquid chamber portion. The liquid filling type vibration isolator is provided by providing a liquid filling type by providing a partition part for partitioning the first liquid chamber part and the second liquid chamber part and an orifice communicating the first liquid chamber part and the second liquid chamber part. In the vibration isolator mounting bracket for mounting on the body, the same effect as the above-described effect of the configuration according to any one of claims 1 to 3 can be obtained.
[0037]
According to the configuration of claim 5, it is possible to provide an anti-vibration device including an anti-vibration body mounting bracket capable of achieving the same effect as the above-described effect according to any one of the configurations of claims 1 to 4. did it.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a liquid filled type vibration damping device is attached to a vehicle body member and a transmission. FIG. 2 is a plan view of the liquid filled vibration damping device. FIG. FIG. 4 is a view showing dimensions of each part of a bracket for mounting a vibration isolator. FIG. 5 is a sectional view taken along line XX of FIG. 4. FIG. 6 is a sectional view taken along line YY of FIG.
2 Vibration isolator 5 First attachment 6 Second attachment 7 Rubber-like elastic body 8 Liquid chamber 9 Diaphragm 10 First liquid chamber 11 Second liquid chamber 12 Orifice 14 Protruding end 15 Mounting bolt 16 Female screw 31 1 mounting part 32 second mounting part 33 partition part 34 fitting hole 35 straightening hole 36 bolt insertion hole

Claims (5)

A metal vibration isolator mounting bracket for mounting a vibration isolator configured by connecting a first mounting tool and a second mounting tool with a rubber-like elastic body to the vibration body,
The metal is aluminum, and a first attachment portion attached to the first attachment and a second attachment portion attached to the vibrating body are provided, and the opposite side of the rubber-like elastic body from the second attachment is provided. A fitting hole for internally fitting the protruding end of the first mounting tool protruding from the first mounting part is provided, and a hole is formed between the first mounting part and the second mounting part. Bracket for mounting the vibration body. A bolt insertion hole through which a mounting bolt is inserted is formed in the first mounting portion, and a female screw portion into which the mounting bolt is screwed is formed in a protruding end portion of the first mounting tool in an axial direction. The bracket for mounting a vibration isolator according to claim 1. The bracket for mounting a vibration isolator according to claim 1 or 2, wherein the second mounting portion is disposed on both sides of the first mounting portion. The vibration isolator includes a diaphragm that forms a liquid chamber between the second mounting member formed in a cylindrical shape and the rubber-like elastic body, and a first liquid chamber part and a second liquid chamber part that connect the liquid chamber to the second liquid fitting part. The vibration isolator according to any one of claims 1 to 3, wherein a partition portion is provided, and an orifice for communicating the first liquid chamber portion and the second liquid chamber portion is provided to constitute a liquid filling type. Bracket. An anti-vibration device comprising the anti-vibration body according to claim 1 and a bracket for mounting the anti-vibration body according to claim 1.

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