JP2001295880A - Liquid-enclosed mount and method of manufacturing the same - Google Patents

Abstract

[PROBLEMS] To provide a liquid-filled mount and a method for manufacturing the same, which reduce the number of parts and manufacturing steps to reduce manufacturing costs. SOLUTION: An inner fitting 12 connected to an engine side and a cylindrical body 13 are connected via a rubber member 14. An orifice member 19 is fixed to the inner periphery of the cylindrical body 13.
An elastic film 22 of the same material as that of the rubber member 14 is fixed to the outer periphery of the rubber member 14 so that the portion facing the recess 15 becomes the movable film 21 forming the sub liquid chamber 20. The orifice member 19 has an orifice passage 17 facing the through hole 16 of the cylindrical body 13, and the liquid in the main liquid chamber 18 and the sub liquid chamber 20 flows through the passage 17 and the through hole 16. Furthermore, the cylinder 1
The three sides are connected to the vehicle body side. Since the elastic film 22 including the portion to be the movable film 21 can be formed at the time of molding the rubber member 14,
It is not necessary to prepare the movable film 21 as one component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled mount used as, for example, an engine mount of a vehicle and a method of manufacturing the mount.

[0002]

2. Description of the Related Art Conventionally, as this type of liquid-filled mount, for example, those described in JP-A-7-301276 and JP-A-8-61423 are known. In these prior arts, the sound and vibration generated by the engine are not transmitted to the vehicle body due to the expansion and contraction of the rubber member and the vibration damping and damping effect due to the flow of the liquid through the orifice between the two main and sub liquid chambers. It has become.

[0003]

However, in both of the above prior arts, it is necessary to prepare and assemble a diaphragm which separates the auxiliary liquid chamber from the air chamber or the atmosphere as one part, and to assemble the parts. There has been a problem that the number of manufacturing steps increases and the manufacturing cost increases.

The present invention has been made in view of such a conventional problem, and has as its object to reduce the number of parts and the number of manufacturing steps to reduce the manufacturing cost, and to provide a liquid-filled mount and its manufacturing method. It is to provide a method.

[0005]

The means for solving the above-mentioned problems and the effects thereof will be described below. Claim 1
The invention according to the invention is a liquid-filled mount connected between the vibration source side and the vehicle body side, wherein the first connection member connected to the vibration source side and the upper side of the cylinder are connected via an elastic body. The intermediate portion of the cylindrical body has a shape recessed inward, a through hole is provided in the recessed portion, and a main liquid chamber is provided between the lower surface of the elastic body and a lower inner surface of the cylindrical body. The same material as that of the elastic body, so that the orifice member which forms the sub-liquid chamber is fixed to the outer periphery of the cylindrical body, and the portion facing the recess is a movable film forming a sub-liquid chamber between the recess and the recess. The orifice member is formed with an orifice passage facing the through hole, and is sealed in the main liquid chamber and the sub liquid chamber through the orifice passage and the through hole. Liquid is allowed to flow, and the cylinder side is connected to the vehicle body side. The features.

According to this structure, the cylinder made of the same material as the elastic body is formed on the outer periphery of the cylinder so that the portion facing the recess forms a movable film forming a sub liquid chamber between the cylinder and the recess. Elastic membrane is fixed. Therefore, a cylindrical elastic film including a portion to be a movable film can be formed at the time of forming an elastic body that connects the first connecting member and the upper side of the cylindrical body, so that the movable film is prepared as one component. No need. Therefore, the number of parts and the number of manufacturing steps can be reduced as compared with the above-described conventional techniques, and the manufacturing cost can be reduced.

In each of the above prior arts, the sub liquid chamber is located below the main liquid chamber, and the sub liquid chamber is separated from the air chamber or the atmosphere by a diaphragm as a movable film. That is, the dimension in the height direction becomes large. On the other hand, in the present invention, the sub liquid chamber is located around the main liquid chamber, and the sub liquid chamber and the air side are separated by the movable film. The size can be reduced.

According to a second aspect of the present invention, in the liquid-filled mount according to the first aspect, the second cylindrical connecting member connected to the vehicle body forms an air chamber around the movable film. In addition, it is characterized by being fixed to the cylindrical body.

According to this structure, the second connecting member has a function as a partition member for forming an air chamber around the auxiliary liquid chamber partitioned by the movable film, and has sufficient strength to be connected to the vehicle body. It can have both functions as a housing for the mount.

According to a third aspect of the present invention, in the liquid-filled mount according to the first or second aspect, the cylindrical elastic film is adhered to an outer peripheral surface of the cylindrical body except for a portion serving as the movable film. It is characterized by having.

According to this structure, before the orifice member is fixed to the inner periphery on the lower side of the cylindrical body, the cylindrical elastic film is pressurized with the fluid from the through-hole of the cylindrical body, so that the concave portion of the elastic film is formed. The movable film can be easily formed by peeling the portion facing the above, that is, the portion where the adhesive is not applied, from the cylindrical body.

According to a fourth aspect of the present invention, in the liquid-filled mount according to any one of the first to third aspects, the orifice member is formed of an elastic body.
The thickness of a portion that separates the main liquid chamber from the atmosphere is optimized so as to function as a movable film.

According to this structure, the orifice member can have the function of a movable film. This makes it possible to keep the dynamic spring constant low with respect to high-frequency vibration generated by a vibration source such as an engine, and to cut off the muffled sound, which is high-frequency vibration.

According to a fifth aspect of the present invention, there is provided the method of manufacturing a liquid-filled mount according to the first aspect, wherein an adhesive is applied to a portion of the outer peripheral surface of the cylindrical body excluding the concave portion. Forming the elastic body connecting the first connecting member and the upper side of the cylindrical body so that the cylindrical elastic film is formed outside the cylindrical body; Pressurizing the cylindrical elastic film with a fluid, peeling off the portion of the elastic film facing the recess from the cylindrical body to form a movable film, and, in liquid, the orifice member is formed of the cylindrical body. Press-fitting into the lower inner periphery.

According to this configuration, a cylindrical elastic film including a portion serving as a movable film for partitioning the sub liquid chamber is formed in the step of molding the elastic body, and the elastic film is pressurized with a fluid to thereby form the elastic film. Of these, the portion facing the hollow portion where the adhesive is not applied is peeled off from the cylindrical body to become a movable film. For this reason,
There is no need to prepare the movable membrane as one part. Therefore, the number of parts and the number of manufacturing steps can be reduced as compared with the above-described conventional techniques, and the manufacturing cost can be reduced.

According to a sixth aspect of the present invention, in the method of manufacturing a liquid-filled mount according to the fifth aspect, the through hole is provided at a position where air can easily escape when the orifice member is pressed into the cylindrical body. It is characterized by the following.

According to this configuration, the air can be easily removed at the time of press-fitting the orifice member, and the press-fitting operation becomes easy. According to a seventh aspect of the present invention, in the method of manufacturing a liquid-encapsulated mount according to the fifth or sixth aspect, when the cylindrical elastic film is pressurized with a liquid to form the movable film, The pressurizing is performed in a step of press-fitting the orifice member in a liquid.

According to this structure, when the cylindrical elastic film is pressurized with a liquid, a container for receiving the pressurized liquid is required, but the pressurization is performed by press-fitting the orifice member in the liquid. By performing the process, a container for receiving the pressurized liquid can be eliminated. In addition, air leakage is improved. In addition, air leakage is improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid-filled mount and a method of manufacturing the same according to an embodiment of the present invention will be described below with reference to the drawings.

First, a liquid-filled mount according to an embodiment will be described with reference to FIG. The liquid-filled mount 11 is for supporting the engine at a predetermined position in the engine room, and is connected between a mounting member on the engine side (vibration source side) and a mounting member on the vehicle body.

In this liquid-filled mount 11,
An inner fitting 12 as a first connecting member connected to a mounting member (not shown) on the engine side and an upper side of a cylindrical body 13 are connected via a rubber member 14 as an elastic body. An intermediate portion of the cylindrical body 13 has a shape recessed inward, and a through hole 16 is provided in the recessed portion 15. Also, the lower surface 36 of the rubber member 14 is
An orifice member 19 forming a main liquid chamber 18 is fixed between the two. On the outer periphery of the cylindrical body 13, a portion facing the recess 15 is provided between the recess 15 and the annular sub-liquid chamber 20.
The elastic film 22 of a cylindrical shape (cylindrical shape) made of the same material as the rubber member 14 so as to become a movable film 21 as a movable film forming
Has been fixed.

The orifice member 19 includes a cylindrical body 13.
An annular orifice passage 17 facing the through hole 16 is formed. The liquid enclosed in the main liquid chamber 18 and the sub liquid chamber 20 flows through the orifice passage 17 and the through hole 16. This liquid is an incompressible fluid, for example, an antifreeze.

The inner fitting 12 has a rectangular flange 3
0, and a metal fitting having a T-shaped vertical cross section, having a screw hole 31 screwed with a screw portion of a bolt. The cylindrical body 13 is made of, for example, metal, and the upper side thereof is a step-like stepped portion 33, and the concave portion 15 is formed.
The lower side is a cylindrical portion 34.

The rubber member 14 is formed in a bowl shape, and its upper end is integrated with the flange 30 so as to cover both ends of the flange 30 of the inner fitting 12. The peripheral portion of the rubber member 14 is provided on the upper side 33 of the cylindrical body 13.
Are integrated. At the upper end of the peripheral portion, a flange portion 32 formed at the upper end of the cylindrical body 13 projects outward from the peripheral portion. Then, the lower end 3 of the rubber member 14
Numeral 5 extends in a cylindrical shape halfway along the inner peripheral surface of the hollow portion 15 of the cylindrical body 13 and is integrated with the inner peripheral surface.

The cylindrical body 13 is connected to the vehicle body. That is, the cylindrical housing 23 (cylindrical second connecting member) connected to the mounting member on the vehicle body side
To form an air chamber 24 around the movable film 21,
It is fixed to the cylinder 13. That is, the housing 23
An annular bent portion 40 is formed at the upper end of the cylindrical member 13, and the bent portion 40 is fixed to the flange portion 32 so as to sandwich the flange portion 32 of the cylindrical body 13. The bottom of the housing 23 is a ring-shaped support plate 42 having a large-diameter opening 43 formed therein.
The lower end of the cylindrical body 13 and the lower end of the elastic film 22 are abutted or fixed, respectively. This housing 23 is made of metal or the like.

The movable elastic film 21 is
It is adhered to the outer peripheral surface of the cylindrical body 13 except for the portion that becomes.
In one embodiment configured as described above, when vibration from the engine side is transmitted to the flange portion 30 of the inner fitting 12, the rubber member 14 expands and contracts, and the expansion and contraction causes the main liquid chamber 18 to expand.
The liquid flows between the main liquid chamber 18 and the sub liquid chamber 20 through the orifice passage 17 and the through-hole 16, and the movable film 21 is elastically deformed by the flow. Due to the expansion and contraction of the rubber member 14 and the vibration damping and damping effects due to the flow of the liquid between the main and sub liquid chambers 18 and 20, the noise and vibration generated by the engine are not transmitted to the vehicle body.

According to the embodiment configured as described above, the following operation and effect can be obtained. (1) The same material (rubber) as the rubber member 14 is formed on the outer periphery of the cylindrical body 13 so that the portion facing the recess 15 becomes the movable film 21 that forms the sub liquid chamber 20 with the recess 15. ) Is fixed. For this reason,
The elastic film 22 including the part to be the movable film 21 can be formed at the time of molding the rubber member 14 that connects the inner fitting 12 and the upper side of the cylindrical body 13, and it is not necessary to prepare the movable film 21 as one component. . Therefore, the number of parts and the number of manufacturing steps can be reduced, and the manufacturing cost can be reduced. (2) Since the auxiliary liquid chamber 20 is located around the main liquid chamber 18 and the auxiliary liquid chamber 20 and the air chamber 24 (atmosphere side) are separated by the movable film 21, the total height of the liquid-sealed mount 11 is reduced. And the size can be reduced. (3) The housing 23 has a function as a partition member for forming an air chamber 24 around the auxiliary liquid chamber 20 partitioned by the movable film 21 and a liquid-encapsulated mount 11 having sufficient strength to be connected to the vehicle body side. Can function as both a housing and a housing. (4) Before the orifice member 19 is fixed to the inner periphery on the lower side of the cylindrical body 13, the cylindrical elastic film 2 is inserted through the through hole 16 of the cylindrical body 13.
2 is pressurized with a fluid (liquid or air), so that the portion of the elastic film 22 facing the recessed portion 15, that is, the portion where the adhesive is not applied, is peeled off the cylindrical body 13 to easily form the movable film 21. be able to.

Next, a method of manufacturing the liquid-filled mount 11 according to the embodiment will be described with reference to FIGS. The manufacturing method includes the following steps (a) to (e). (A) A step of applying an adhesive to a portion of the outer peripheral surface of the cylindrical body 13 except for the depression 15. (B) As shown in FIG. 2A, the rubber member 14 connecting the inner fitting 12 and the upper side of the cylindrical body 13 is formed so that the cylindrical elastic film 22 is formed outside the cylindrical body 13. Forming process. (C) As shown by the arrow in FIG. 2A, the cylindrical elastic film 22 is formed into a fluid (liquid or air) through the through hole 16 of the cylindrical body 13.
And forming a movable film 21 (see FIG. 2B) by peeling off the portion of the elastic film 22 facing the depression 15 from the cylindrical body 13. (D) As shown in FIG. 3A, a step of press-fitting the orifice member 19 into the inner periphery on the lower side of the cylindrical body 13 in the liquid 51 stored in the water tank 50 (in the liquid). At the end of the press-fitting step, as shown in FIG. 3B, the liquid is sealed in the liquid chambers 18 and 20. The liquid 51 is supplied to both the liquid chambers 18 and
Use the same liquid as the liquid to be filled in 20. (E) assembling the housing 23 to the cylindrical body 13 as shown in FIG.

According to this manufacturing method, the following operation and effect can be obtained. (5) A cylindrical elastic film 22 including a portion serving as a movable film 21 partitioning the sub liquid chamber 20 is formed in the step (b) of molding the rubber member 14, and the elastic film 22 is pressurized with a fluid. A portion of the elastic film 22 that faces the hollow portion 15 on which the adhesive is not applied is peeled from the cylindrical body 13 to become the movable film 21. Therefore, there is no need to prepare the movable film 21 as one component. Therefore, the number of parts and the number of manufacturing steps can be reduced, and the manufacturing cost can be reduced. (Modification) The present invention can be embodied with the following modifications.

In the embodiment, as shown in FIG. 1, the lower end 35 of the rubber member 14 is
Although it extends in a cylindrical shape halfway along the inner peripheral surface of 5, the lower end 35 may extend further downward as shown in FIG. In this case, the orifice member 19 is
At the time of press-fitting, the inner peripheral surface of the orifice member 19 comes into contact with the inner peripheral surface of the cylindrical body 13 in a state where the lower end portion 35 of the rubber member 14 is crushed, so that high liquid tightness is obtained.

In the above embodiment, the orifice member 19 may be formed of an elastic material such as rubber, and the thickness of the portion 37 separating the main liquid chamber 18 and the atmosphere may be optimized so as to function as a movable film. Good. With this configuration, the orifice member 19 can have the function of a movable film.
This makes it possible to keep the dynamic spring constant low with respect to high-frequency vibration generated by a vibration source such as an engine, and to cut off the muffled sound, which is high-frequency vibration.

In the above manufacturing method, the work of pressing the orifice member 19 into the cylinder 13 in the liquid is performed with the work being vertical as shown in FIG. You may.

In the manufacturing method, the through hole 16
Is provided at a position where air is easily released when the orifice member 19 is press-fitted into the cylindrical body 13, that is, at a position close to the cylindrical portion 34. become.

In the above-described manufacturing method, when the cylindrical elastic film 22 is pressurized with a liquid to form the movable film 21, in the step (d) of press-fitting the orifice member 19 in the liquid. Pressure may be applied. According to this configuration, when the elastic film 22 is pressurized with a liquid, a container for receiving the pressurized liquid is required. However, the pressurization is performed in the step of press-fitting the orifice member in the liquid. This eliminates the need for a container for receiving the pressurized liquid.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a liquid-filled mount according to one embodiment.

FIG. 2A is a longitudinal sectional view showing one step of a method of manufacturing a liquid-filled mount, and FIG. 2B is a longitudinal sectional view showing the mount with a movable film formed.

FIG. 3A is an explanatory view showing a step of press-fitting an orifice member in a liquid, and FIG. 3B is a longitudinal sectional view showing a state where the press-fitting is completed.

FIG. 4 is a partially enlarged view showing a modification of the embodiment shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Mounting type mount, 12 ... Inner fitting (1st connection member), 13 ... Cylinder, 16 ... Through hole, 17 ... Orifice passage, 18 ... Main liquid chamber, 19 ... Orifice member, 20 ...
Sub liquid chamber, 21 movable film, 22 elastic film, 23 housing (second connecting member), 24 air chamber, 36 lower surface, 51
…liquid.

Claims (7)

[Claims] 1. A liquid-filled mount connected between a vibration source side and a vehicle body side, wherein a first connection member connected to the vibration source side and an upper side of the cylinder are connected via an elastic body. The intermediate portion of the cylindrical body has a shape recessed inward, a through hole is provided in the recessed portion, and a main liquid chamber is provided between the lower surface of the elastic body and a lower inner surface of the cylindrical body. The same material as that of the elastic body, so that the orifice member which forms the sub-liquid chamber is fixed to the outer periphery of the cylindrical body, and the portion facing the recess is a movable film forming a sub-liquid chamber between the recess and the recess. The orifice member is formed with an orifice passage facing the through hole, and is sealed in the main liquid chamber and the sub liquid chamber through the orifice passage and the through hole. Liquid is allowed to flow, and the cylinder side is connected to the vehicle body side. Fluid-filled mount according to claim. 2. The liquid-filled mount according to claim 1, wherein the cylindrical second connecting member connected to the vehicle body is formed on the cylindrical body so as to form an air chamber around the movable film. It is characterized by being fixed. 3. The liquid-filled mount according to claim 1, wherein the cylindrical elastic film is adhered to an outer peripheral surface of the cylindrical body except for a portion serving as the movable film. I do. 4. The liquid-filled mount according to claim 1, wherein the orifice member is formed of an elastic body, and has a thickness of a portion that separates the main liquid chamber from the atmosphere. Is optimized to function as a movable film. 5. The method for manufacturing a liquid-filled mount according to claim 1, wherein an adhesive is applied to a portion of the outer peripheral surface of the cylindrical body other than the recessed portion, and an outside of the cylindrical body. Forming the elastic body that connects the first connection member and the upper side of the cylindrical body so that the cylindrical elastic film is formed in the cylindrical elastic film; and forming the cylindrical elastic film from the through hole. Forming a movable film by pressurizing with a fluid and peeling a portion of the elastic film opposed to the recessed portion from the cylindrical body; and press-fitting the orifice member into an inner periphery of a lower side of the cylindrical body in a liquid. A method of manufacturing a liquid-filled mount. 6. The method for manufacturing a liquid-filled mount according to claim 5, wherein the through-hole is provided at a position where air can easily escape when the orifice member is pressed into the cylindrical body. 7. The method of manufacturing a liquid-filled mount according to claim 5, wherein the pressurization of the cylindrical elastic film is performed with a liquid to form the movable film. The pressurizing is performed in the step of press-fitting the orifice member.