JPH1078074A - Vibration isolation device and manufacture of vibration isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembly workability so as to reduce the cost of manufacture. SOLUTION: An elastic unit 18 is mounted between an upper part mounting member 24 and an outer cylinder metal fitting 16, the outer cylinder metal fitting 16 is press fitted to a bracket 12. In a peripheral side of the bracket 12, a U shape-formed leg part 14 is provided. In the upward side of the mounting member 24, an arm bracket 26 is arranged. A lock bolt 28 is inserted to the arm bracket 26, the lock bolt 28 is screwed to the mounting member 24. In an upper part of the mounting member 24, a rebound stopper metal fitting 60 is arranged, its both end parts are fitted to the leg part 14. In the rebound stopper metal fitting 60 and the leg part 14, through holes 14A, 60A are formed, by a lock screw, the leg part 14 and the rebound stopper metal fitting 60 are integrally penetrated, to be connected to a car body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator and a method of manufacturing the vibration isolator applied to a case where transmission of a vibration from a vibration generator is prevented, and relates to a method of manufacturing the vibration isolator. It is applicable to mounts for supporting members.

[0002]

2. Description of the Related Art For example, a vibration isolator as an engine mount is provided between an engine serving as a vibration generating portion of a vehicle and a vehicle body serving as a vibration receiving portion. Is absorbed and is prevented from being transmitted to the vehicle body.

[0003] That is, as this vibration isolator, there is known one in which an elastic body and a pair of liquid chambers are provided inside the vibration isolator, and these liquid chambers are communicated with each other through a restricted passage serving as an orifice. When the mounted engine operates and generates vibration, the vibration is absorbed by the vibration damping function of the elastic body and the viscous resistance of the liquid in the orifice communicating with these liquid chambers, and the vibration is transmitted. It is designed to block.

As one example, a vibration isolator 110 as shown in FIGS. 5 and 6 is known, and will be described below.

[0005] As shown in these figures, an outer cylinder fitting 120 is provided.
A rubber elastic body 118 is provided between the
Are vulcanized and bonded to these fittings. Further, an outer cylinder fitting 120 is inserted into the bracket 114, and the rebound stopper fitting 112 is swaged to the bracket 114.

[0006] A liquid chamber 124 is provided between the diaphragm 122 and the elastic body 118 disposed in the outer cylinder 120, and the liquid chamber 124 is formed by a pair of liquid chambers 124A and 124A.
A partition tube 130 having a section 4B and having an orifice 132 is provided in the liquid chamber 124.

Therefore, the vibration isolator 110 is provided in both the liquid chambers 1.
The liquid in both liquid chambers 124A and 124B circulates through orifice 132 communicating with 24A and 124B to reduce vibration.

In assembling the vibration isolator 110,
The outer tube fitting 120 is inserted into the bracket 114 from the direction of arrow A,
The upper mounting bracket 116 and the elastic body 118 are integrally inserted,
After this, the end 112A of the rebound stopper fitting 112
From the direction of the arrow B opposite to the direction of insertion of the elastic body 118, and attach the rebound stopper fitting 112 to the bracket 1.
14 fixed.

[0009]

However, when assembling the conventional vibration isolator 110 as described above, the elastic member 11 is required.
8 into the bracket 114, and further, caulking the rebound stopper fitting 112 to rebound stopper fitting 1
12 is fixed to the bracket 114, but the elastic body 11
In addition to the fact that the insertion direction of No. 8 and the direction of the caulking of the rebound stopper fitting 112 are different from each other by 180 °, these insertion and caulking have to be performed independently.

[0010] For this reason, during the assembling process of the vibration isolator, an independent process for caulking is required, so that the number of processes is increased, the assembling work is complicated, and the manufacturing cost is increased. I was

The present invention has been made in view of the above circumstances, and has as its object to provide a vibration isolator and a method of manufacturing the vibration isolator which can improve the assemblability and reduce the manufacturing cost.

[0012]

According to a first aspect of the present invention, there is provided an anti-vibration device including a first mounting member connected to one of a vibration generating portion and a vibration receiving portion, and a first mounting member located on an outer peripheral side of the first mounting member. A mounting member, an elastic body interposed between the pair of mounting members, a bracket in which the second mounting member is press-fitted and the pair of mounting members and the elastic body are housed, A joint formed to protrude from the bracket,
The fixture is mutually fitted with the joint and disposed so as to face the first mounting member, and is integrally penetrated with the joint by a fixture fixed to the other of the vibration generating unit and the vibration receiving unit. And a stopper member for limiting the displacement of the first mounting member within a certain range.

According to a second aspect of the present invention, in the vibration isolator according to the first aspect, each of the joints is formed as a pair in a U-shape, and both ends of the stopper member respectively fit into the pair of joints. It is characterized by being combined.

According to a third aspect of the present invention, there is provided a method of manufacturing a vibration isolator, wherein the first mounting member is connected to one of the vibration generating section and the vibration receiving section, and the second mounting section is located on the outer peripheral side of the first mounting member. A method of manufacturing a vibration isolator applied to a vibration isolator having a member and an elastic body interposed between the pair of mounting members, wherein the second mounting member is press-fitted into a bracket. Then, the pair of mounting members and the elastic body are housed in the bracket, and a stopper member for limiting the displacement of the first mounting member within a predetermined range is fitted into a joint formed by projecting from the bracket. Then, a stopper member is temporarily fixed to the joining portion, and thereafter, a fixing tool is fixed to the other of the vibration generating portion and the vibration receiving portion while penetrating the joining portion and the stopper member. Move the member to the vibration generator Fixed to the other of the vibration receiving portion, characterized in that.

The operation of the vibration isolator according to claim 1 will be described below. An elastic body is interposed between the first mounting member and the second mounting member, the second mounting member is press-fitted into the bracket, and the pair of mounting members and the elastic body are housed in the bracket.

The joint protruding from the bracket and the stopper member are fitted to each other, the stopper member is arranged to face the first mounting member, and the stopper member is integrally penetrated with the joint by the fixture. The fixing member is fixed to the other of the vibration generating section and the vibration receiving section, and the joint section and the stopper member are integrally fixed to the other of the vibration generating section and the vibration receiving section.

Therefore, when the vibration is transmitted from the vibration generating section connected to the first mounting member, the elastic body is deformed, the vibration is attenuated by the deformation of the elastic body, and the vibration is transmitted to the vibration receiving section. It becomes difficult to be transmitted. At this time, the stopper member limits the displacement of the first attachment member within a certain range.

Further, since the second mounting member is press-fitted into the bracket, and the joint projecting from the bracket and the stopper member are fitted to each other, the direction in which the second mounting member is press-fitted into the bracket, By setting the joining direction of the joining portion and the stopper member to be the same, it is possible to reduce the number of steps by one press-fitting and fitting at the same time.

Further, since the stopper member is integrally penetrated by the fixture together with the joint, and the fixture is fixed to fix the joint and the stopper member, a caulking process is not required during the assembly process of the vibration isolator. Thus, the number of steps is reduced, the assembly is simplified, the assemblability is improved, and the manufacturing cost is reduced.

The operation of the vibration isolator according to claim 2 will be described below. The present invention has the same function as the first embodiment. However, in the present invention, a pair of joints are formed in a U-shape, respectively, and both ends of the stopper member are fitted into the pair of joints, respectively. Therefore, since a pair of joints are formed in a U-shape, both ends of the stopper member are fitted into the pair of joints, respectively.
These are more securely fixed.

The operation of the method for manufacturing a vibration isolator according to claim 3 will be described below. First, the second mounting member is press-fitted into the bracket, the pair of mounting members and the elastic body are housed in the bracket, and a stopper member is fitted to a bonding portion formed to protrude from the bracket. Temporarily stop the stopper member.

Next, the fixture is penetrated through the joining portion and the stopper member, and is fixed to the other of the vibration generating portion and the vibration receiving portion, and the joining portion and the stopper member are fixed to the other of the vibration generating portion and the vibration receiving portion.

Therefore, similarly to the first aspect, the press-fitting of the second mounting member into the bracket and the fitting between the stopper member and the joining portion can be performed simultaneously, and the second mounting member can be formed. By making the direction of press-fitting into the bracket the same as the direction of fitting between the joint and the stopper member, the process of press-fitting and fitting simultaneously can be reduced by one process.

Further, since the stopper member is integrally penetrated by the fixture together with the joint, and the fixture is fixed to fix the joint and the stopper member, a caulking process is not required during the assembly process of the vibration isolator. Thus, the number of steps is reduced, the assembly is simplified, the assemblability is improved, and the manufacturing cost is reduced.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 show a first embodiment of a vibration isolator and a method of manufacturing the vibration isolator according to the present invention, and the present embodiment will be described with reference to these drawings.

As shown in FIG. 1 showing the present embodiment, one mounting member of the vibration isolator 10 is constituted by an outer tube fitting 16 formed in a cylindrical shape. The outer tube fitting 16 includes a first cylindrical portion 16 </ b> B formed in a cylindrical shape and a first cylindrical portion 1.
A second cylindrical portion 16C having a diameter slightly smaller than 6B and formed in a cylindrical shape below the first cylindrical portion 16B is provided. further,
A disk-shaped flange portion 16A is provided on the upper end of the outer cylindrical fitting 16.
Is formed, and a tapered portion 16 </ b> D that contracts in a tapered shape is connected to a lower end portion of the outer cylindrical fitting 16.

The outer cylindrical member 16 is formed in a cup shape, and has a flange portion 12A extending to the outer periphery press-fitted into a bracket 12 formed at an upper portion, and is disposed in the bracket 12. On the outer peripheral side of the bracket 12,
As shown in FIGS. 2 and 3, a pair of legs 14, each of which is a joint formed in a U-shape, is provided so as to protrude to the outer peripheral side of the bracket 12.

An outer peripheral surface of a rubber elastic body 18 which is formed in a cylindrical shape and has an inter-ring 20 embedded therein is vulcanized and bonded to the inner peripheral surface of the outer cylindrical member 16. 16 surrounds and holds the elastic body 18.

Further, in the center of the elastic body 18, an upper mounting member 24 made of metal and formed in a conical shape is embedded while being vulcanized and bonded, and the upper end of the upper mounting member 24 is elastic. It protrudes from the body 18. The upper mounting member 24 is provided with a screw hole 24A in which a female screw is formed, and a detent pin 25 is mounted.

As described above, the elastic body 18 is attached to the bracket 12 by being interposed between the upper attachment member 24 serving as the first attachment member and the outer tube fitting 16 constituting the second attachment member. The outer tube fitting 16 is press-fitted, and the outer tube fitting 16, the upper mounting member 24, and the elastic body 18
It is housed in the bracket 12.

A stopper rubber 2 is provided above the upper mounting member 24 and at a position facing the top surface of the upper mounting member 24.
An arm bracket 26 is provided via the second bracket 2. That is, in the cylindrical stopper rubber 22, the prism 2 forming the base end side of the arm bracket 26 formed of an iron casting or the like is formed.
6A is press-fitted. A hole 22A is formed in the upper wall of the stopper rubber 22, an opening 22B is formed in the lower wall of the stopper rubber 22, and a through hole 27A is formed in the prism 26A.

Therefore, the hole 22A formed in the upper wall of the stopper rubber 22 and the through hole 27A formed in the prism 26A are formed.
A stopper bolt 28 is inserted from above into an opening 22B formed in the lower wall of the stopper rubber 22, and the stopper bolt 28 is screwed into a screw hole 24A of the upper mounting member 24, so that the arm bracket 26 is moved upward. Mounting member 24
It is fixed to.

Further, a plurality of bolt holes 27B for connecting the arm bracket 26 to an engine (not shown) serving as a vibration generating section are provided at the tip end side of the arm bracket 26.
Are formed. Therefore, the upper mounting member 24 protruding from the elastic body 18 is used for connection to the engine, and the upper mounting member 24 is connected to the engine serving as a vibration generating unit via the arm bracket 26. .

Above the upper mounting member 24, a rebound stopper fitting 60, which is a stopper member for limiting the displacement of the upper mounting member 24 within a certain range, faces the upper mounting member 24 via the arm bracket 26. It is arranged. In FIG. 3, both ends of the rebound stopper fitting 60 formed in an inverted U-shape are fitted into the pair of legs 14 by press fitting.

Through holes 14A and 60A are formed in both ends of the rebound stopper fitting 60 and the leg 14, respectively. The through holes 14A and 60A are formed in the leg 14 by a pair of set screws 64 which are fixing tools shown in FIG. The hole 14A and the through hole 60A of the rebound stopper fitting 60 are integrally penetrated,
The vibration isolator 10 is fixed to the vehicle body 62 by being fastened to the vehicle body 62 serving as a vibration receiving unit.

On the other hand, a rubber diaphragm 30 is provided on the inner peripheral surface.
Is vulcanized and bonded to the second cylindrical portion 16C.
It fits inside and is fixed.

Between the diaphragm 30 and the elastic body 18, there is provided a liquid chamber 32 having an inner wall formed by these members, and a liquid such as water or oil is sealed therein. In the liquid chamber 32, a partition member 34 made of, for example, a synthetic resin material is disposed so as to be fitted to the inner wall surface of the elastic body 18, and the liquid chamber 32 is divided into a main liquid chamber 32A and a sub liquid chamber 32B. And divided into two.

Further, at the center of the partition member 34,
A circular opening 38 is formed, and a groove 36 formed in a groove shape is formed substantially along the outer peripheral end 34B inside the outer peripheral end 34B which is the outer peripheral surface of the partition member 34. Have been. At one end of the groove 36, a small hole 52 communicating the main liquid chamber 32A and the inside of the groove 36 is formed, and at the other end, a small hole 54 communicating the sub liquid chamber 32B and the inside of the groove 36 is formed. Is formed. Therefore, the elastic body 1
8, the groove 36 and the small hole 52 closed by the inner wall surface,
54 constitutes the orifice 42 communicating between the main liquid chamber 32A and the sub liquid chamber 32B.

Further, the diaphragm 30 and the bracket 1
An air chamber 44 is formed between the diaphragm 30 and the bottom wall of the diaphragm 30.
Is possible.

On the other hand, a rib 34A projecting upward from the opening 38 is formed in the partition member 34, and a membrane 46, which is an elastic plate having a central portion projecting in a circular shape, is engaged with the rib 34A. ing.

In the lower part of the membrane 46 near the outer periphery, the outer peripheral end is formed by the diaphragm 30 and the partition member 34.
And a circular metal plate 48 protruding in a circular shape so that the central portion is fitted into the opening portion 38, and the membrane 46 is sandwiched between the ribs 34A. ing. In addition, a hole is provided at the position of the disk 48 corresponding to the small hole 54 as shown in the figure.

Next, a procedure for manufacturing the vibration isolator 10 according to the present embodiment will be described. First, the upper mounting member 24 and the outer tube fitting 16 are placed in a mold, and the elastic body 18 is vulcanized.
Then, in the liquid, the partition member 34 and the diaphragm 30 with the membrane 46 and the disk 48 mounted thereon are inserted into the outer tube fitting 16, and the lower end portion of the outer tube fitting 16 is caulked to form a tapered portion 16 </ b> D. By doing so, these members are housed in the outer tube fitting 16, and the state shown in FIG. 4 is obtained. Then, the prism 26A of the arm bracket 26 is pressed into the stopper rubber 22, and the stopper rubber 2 is pressed.
The arm bracket 26 is fixed to the upper mounting member 24 by inserting a set bolt 28 through the arm bracket 26 and the arm bracket 26.

Next, the outer cylindrical member 16 is press-fitted into the bracket 12, and the upper mounting member 24, the outer cylindrical member 16 and the elastic member 1 are pressed.
8 is accommodated in the bracket 12, and both ends of the rebound stopper fitting 60 are fitted to a pair of legs 14 protruding from the bracket 12, and the rebound stopper fitting 60 is temporarily attached to the pair of legs 14. Once stopped, assembly is complete, as shown in FIGS.

Thereafter, the vibration isolator 1 thus completed is completed.
0 is installed in the vehicle, and a pair of setscrews 64 are passed through both ends of the pair of legs 14 and the rebound stopper fitting 60 and fastened and fixed to the vehicle body 62, as shown in FIG. A bracket 12 connected to the leg 14,
The rebound stopper fitting 60 is fixed to the vehicle body 62, and the vibration isolator 10 can be mounted on the vehicle body 62. And
A bolt (not shown) is fastened to a plurality of bolt holes 27B of the arm bracket 26 to attach the arm bracket 2 to the engine.
6 are connected.

Next, the operation of the present embodiment will be described. When an engine mounted on the upper mounting member 24 via the arm bracket 26 operates, vibration of the engine is transmitted to the elastic body 18 via the arm bracket 26 and the upper mounting member 24.

The elastic body 18 acts as a vibration absorbing body, and can absorb vibration by a vibration damping function based on internal friction of the elastic body 18. Further, the main liquid chamber 32A and the sub liquid chamber 3
The liquid in 2B circulates through orifice 42 to each other,
The damping effect based on the pressure change of the liquid generated in the orifice space, the viscous resistance of the liquid flow, and the like can improve the vibration isolation effect.

On the other hand, even when high-frequency vibration is transmitted, the orifice 42, which can only reduce the frequency range in a narrow range, is clogged and the vibration is not sufficiently reduced by the orifice 42 alone. Is not elastically deformed and the internal pressure in the liquid chamber 32 does not increase. As a result, even if high-frequency vibration that cannot be reduced by the orifice 42 is generated, the orifice 42 becomes a low dynamic spring, the vibration isolating characteristics are maintained without being reduced, and the effect of the vibration isolating device 10 is sufficiently exhibited.

On the other hand, when vibration of excessive amplitude is input from the engine, the rebound stopper fitting 60 arranged opposite to the outer fitting 16 limits the displacement of the outer fitting 16 to a certain range. Will do.

Further, the outer tube fitting 16 is press-fitted into the bracket 12, and the outer tube member 16, the upper mounting member 24 and the elastic body 18 are housed in the bracket 12, and a pair of legs 14 projecting from the bracket 12 The rebound stopper fitting 60 is fitted with the rebound stopper fitting 60 so that the rebound stopper fitting 60 is arranged to face the upper mounting member 24. Then, the rebound stopper fitting 60 is integrally penetrated with the pair of legs 14 by the set screw 64, and the set screw 64 is fastened and fixed to the vehicle body 62.
4 and the rebound stopper fitting 60 are integrally
, And the vibration isolator 10 is mounted on the vehicle body 62.

As described above, at the time of assembling the vibration isolator 10, the outer tube fitting 16 is press-fitted into the bracket 12, and the pair of legs 14 projecting from the bracket 12 and the rebound stopper fitting 60 are mutually fitted. Therefore, by making the direction of press-fitting the outer tube fitting 16 into the bracket 12 and the fitting direction of the pair of leg portions 14 and the rebound stopper fitting 60 the same, the process of press-fitting and fitting at the same time is equivalent to one process. It can be reduced. Until the vibration isolator 10 is mounted on the vehicle, the rebound stopper fitting 60 is temporarily fixed to the bracket 12 by press fitting and fitting.

Further, the pair of legs 14 and the rebound stopper fitting 60 are integrally penetrated by a set screw 64, and the set screw 64 is fastened to the vehicle body 62 of the vehicle, so that the pair of legs 14 and the rebound stopper fitting 60 are formed. Since it is fixed, the caulking process is not required during the assembly process of the vibration isolator 10. As a result, the number of steps is reduced, the assembly is simplified, the assemblability is improved, and the manufacturing cost of the vibration isolator 10 is reduced.

Further, since the pair of legs 14 is formed in a U-shape, and both ends of the rebound stopper fitting 60 are fitted to the pair of legs 14, respectively, the pair of legs 14 and the rebound stopper fitting 60 are provided. Are more reliably fixed.

In the above-described embodiment, the upper mounting member 2 serving as the first mounting member for the engine that is the vibration generating section.
4 side, and a bracket 1 is attached to the vehicle body 62 as a vibration receiving portion.
Although the configuration is such that the two sides are connected, the configuration may be reversed, and the present invention may be applied to a vibration isolator without the liquid chamber 32.

In the above-described embodiment, a pair of legs 14 serving as a joint is provided. However, it is not always necessary to provide one pair, and it is needless to say that at least one or more may be provided. Further, when assembling the vibration isolator 10, the press-fitting of the outer tube fitting 16 into the bracket 12 and the fitting between the leg portion 14 and the rebound stopper fitting 60 need not be performed at the same time. Both ends of the metal fitting 60 may be formed in a U-shape, and a structure may be employed in which the legs are fitted into both ends of the rebound stopper metal fitting 60. In the above embodiment, the fixing tool is the set screw 64, but a fixing tool such as a rivet may be used.

On the other hand, in the embodiment, the purpose is to dampen an engine mounted on a vehicle. However, the anti-vibration device of the present invention is used for, for example, a body mount of a vehicle or other uses other than the vehicle. Needless to say,
The shape and size of the elastic body and the number of orifices are not limited to those of the embodiment.

[0056]

According to the vibration damping device and the method for manufacturing the vibration damping device of the present invention, as described above, the assemblability can be improved and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing one embodiment of a vibration isolator according to the present invention.

FIG. 2 is a side view showing an embodiment of a vibration isolator according to the present invention.

FIG. 3 is another side view showing an embodiment of the vibration isolator according to the present invention.

FIG. 4 is a cross-sectional view for explaining assembly of an embodiment of the vibration isolator according to the present invention.

FIG. 5 is a cross-sectional view illustrating a vibration isolator according to the related art.

FIG. 6 is a side view showing a vibration isolator according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Bracket 14 Leg part (joining part) 16 Outer cylinder fitting (second mounting member) 18 Elastic body 24 Upper mounting member (first mounting member) 60 Rebound stopper fitting (stopper member) 64 Set screw ( Fixture)

Claims (3)

[Claims] A first mounting member connected to one of the vibration generating portion and the vibration receiving portion; a second mounting member located on an outer peripheral side of the first mounting member; An elastic body interposed between the brackets; a bracket in which the second mounting member is press-fitted to accommodate the pair of mounting members and the elastic body; a bonding portion formed to protrude from the bracket; And is fixed to the first mounting member by being fixed to the other of the vibration generating portion and the vibration receiving portion so as to be integrally fitted with the connecting portion and to be integrally penetrated with the joint portion; And a stopper member for limiting the displacement of the first mounting member within a certain range. 2. The connector according to claim 1, wherein a pair of the joints are formed in a U-shape, and both ends of the stopper member are fitted into the pair of joints, respectively.
Anti-vibration device as described. 3. A first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member located on the outer peripheral side of the first mounting member, and a portion between the pair of mounting members. A method of manufacturing a vibration isolator applied to a vibration isolator having an elastic member interposed between the elastic member and the elastic member. And a stopper member for limiting the displacement of the first mounting member within a certain range is fitted to a joint formed by projecting from the bracket, and the stopper member is temporarily attached to the joint. After that, the fixing tool is fixed to the other of the vibration generating part and the vibration receiving part while penetrating the joining part and the stopper member,
A method for manufacturing a vibration isolator, comprising: fixing the joining portion and the stopper member to the other of the vibration generating portion and the vibration receiving portion.