JPS6026828A - Engine mount filled with fluid - Google Patents

Abstract

PURPOSE:To enable a dynamic characteristic to be optionally selected while improving durability of an engine mount and facilitate its mounting, by interposing a separator plate, which forms an orifice in its center, between upper and lower elastic members while additionally providing a diaphragm to be spread upward in a base member. CONSTITUTION:A fluid chamber 2 and a diaphragm chamber 3 of an engine mount 1 are filled with fluid and sealed. Then a separator plate 50, which partitions the mount into the fluid chamber 2 and the diaphragm chamber 3, is held between share spring rubbers 30, 40 in upper and lower two stages so as to support an orifice 51, provided in the separator plate 50, to be floated, thus forming a movable orifice. In this way, an optional dynamic characteristic of the engine mount can be obtained further is durability can be improved by variable damping force following swing motion of the variable orifice 51. Further a base member 10 is formed by a cylindrical structure 11, and the peripheral edge of a diaphragm 60 is inserted into a squared shape 13 with one end open in a holding part 12 formed in the bottom part of said base member 10. Then the cylindrical structure 11 forms in its upper part a flange part 15, and its mounting hole 16 enables easy mounting therethrough to a car body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a fluid-filled engine mount, and in particular improves the dynamic characteristics, and furthermore, the base member can be easily connected to the fixed part body side even if a diaphragm is attached. This article relates to a fluid-filled engine mount.

As shown in Fig. 3, in Utility Model Application No. 58-2584.3, an orifice is provided in the center between the mounting member 120 connected to the engine and the base member 110 on which the engine is mounted, which also serves as a mass part I2. A thick partition member 150 having a shape of 151 is interposed between the partition member 150, the mounting part 120, and the base member 110, respectively.
A fluid-filled engine mount 101 is disclosed that is coupled at 140.130.

Such an engine mount 101 has improved dynamic characteristics due to the vibration due to the quality H of the partition part 150 and the variable damping force of the movable orifice 151 caused by this.

That is, the movable orifice 1 when the partition member 150 resonates.
Vibration damping by 51 and upper and lower elastic members 140°130
Since the orifice 151 can only damp vibrations by itself, and the volumes of the upper and lower fluid chambers 102 and 104 are both constant, the orifice 151 does not damp vibrations except during resonance.

Therefore, the vibration is damped by the orifice 151 without making the elasticity of the upper and lower elastic members 140 and 130 different, but only one of the soft elastic members always performs bending and palmar movements, resulting in poor durability. There is.

By the way, since the base member 110 has a disc shape as shown in the figure, if a diaphragm is to be attached to it, the base member 110 will inevitably become a ring plate member. When connected, if the diaphragm bulges downward beyond the base member, it is difficult to connect it to the fixed member, and if the diaphragm bulges upwards than the base member, an air vent must be formed on the fixed part. Of course, in both cases, consideration must be given to the connection to the fixed part.

The present invention has been made in view of the above-mentioned points of view and to solve these problems.The purpose of the present invention is to use an orifice to attenuate vibrations other than resonance, and to make the upper and lower elastic members have different elasticities. To provide a fluid-filled engine mount that achieves this without causing any damage, thereby improving durability, and furthermore, even if a diaphragm is attached to the base member, the base member can be easily connected to the fixed member side. There is something to do.

In order to achieve such an object, the present invention has the following features in its first invention:
The elastic part 42 is configured in two stages, upper and lower, and a partition plate with an orifice formed in the center is interposed and supported between the upper and lower elastic members, and a diaphragm is attached to the base member that bulges upward and faces into the fluid chamber at the bottom. The second invention further provides a cylindrical body formed by forming a flange part in the upper part of the base part I, and a holding part having a U-shaped cross section open inward in the lower part. The peripheral edge of the diaphragm is inserted into the U-shape of the clamping part, the diaphragm is clamped by caulking, and the flange part is used as a joint part to the fixing member.

A preferred embodiment of the present invention will be described below in detail with reference to FIGS. 1 and 2.

FIG. 1 is a half-cut plan view of a fluid-filled engine mount according to the present invention, and FIG. 2 is a longitudinal sectional view thereof.

The base member 1o fixed to the vehicle body frame has a truncated flange portion 15 formed all around the upper part and an annular clamping part 12 having a U-shaped cross section that is open inward and bent at the lower part. It consists of a cylindrical body 11 in the shape of an inverted cone, and the flange portion 15 has two mounting holes 16 facing each other to the vehicle body frame.
．． 16 are bored, and the periphery of the 7-run 2 part 150 is bent upward with these mounting holes 16.16 as boundaries to form opposing upright pieces 17.17, thereby forming the diflange part 15.
We are aiming for a strength of 7 points.

On the other hand, the mounting member 20 connected to the engine is a truncated conical cylinder formed by bending a thin disc body 21 and an annular mounting part 26 having a U-shaped cross section and opening inward at the upper part. 25 and 9, the circumferential edge of the disc body 21 is inserted into the U-shape 27 of the annular attachment part 26 of the cylinder body 25, and is caulked and fixed and integrated by welding etc., and the engine is mounted in the center of the disc body 21. A mounting bolt 22 is fixedly protruding upward.

The outer circumference of shear spring rubber, which is an umbrella-shaped elastic member 30, is completely baked on the inner circumference of the cylindrical body 11 constituting the base member 10, and furthermore, a partition plate made of a thin plate-like disk body is attached to the upper surface of this shear spring rubber 30. Burn the bottom surface of 50. An orifice 51 is bored in the center of this partition plate 50.

Then, on the top surface of this partition plate 50, there is a reverse 7y different from the above.
The lower surface of the shear spring rubber, which is the hollow elastic member 40, is baked, and the inner periphery of the cylinder 25 and the lower surface of the circumferential edge of the disc body 21, which constitute the mounting member 20, are baked on the outer periphery of the shear spring rubber 40. .

Further, the annular clamping portion 12 of the cylindrical body 11 constituting the base member 10
Insert the peripheral edge of the diaphragm 6o, which bulges upward to form a hemispherical shape in the free state, into the U-shape 13, and insert the peripheral edge of the cover plate 610, which bulges downward, and move the holding part 12 in the downward direction. The base member 1' OK diaphragm 60 and its cover plate 6 are caulked to
1 is fixed and integrated.

In this way, inside the fluid-filled engine mount 1, a thin plate-shaped partition plate 5o sandwiched between upper and lower shear spring rubbers 30 and 40 provides a fluid chamber 2 with a large volume in the upper part and a fluid chamber 2 with a small volume in the lower part. A small diaphragm chamber 3 is defined.

The above is assembled concentrically, and the upper and lower shear spring rubbers 30 and 40 are joined at a plurality of radial circular holes 52 formed in the partition plate 50, and each of the shear spring rubbers 30 and 40 is On the outside near the outer periphery, four stoppers 31... and 41 are integrally provided and protrude radially in opposite directions.

Further, an F punch hole 62 is bored in the cover plate 61.

The fluid chamber 2 and diaphragm chamber 3 of the fluid-filled engine mount 1 configured as described above are filled with a fluid such as liquid or gas (liquid in the drawing) and inserted.

A partition plate 50i made of a thin plate separates the fluid chamber 2 and the diaphragm chamber 3 from each other.
An orifice 5 which is sandwiched between 0 and 40 and elastically supported, that is, communicates both chambers 2 and 3 formed in the partition plate 5o.
Since the movable orifice 1 is supported in a floating manner, arbitrary dynamic characteristics can be obtained by the variable damping force accompanying the swinging of the movable orifice 51.

That is, since the lower chamber is a diaphragm chamber 3 whose volume changes, when the pressure in the upper fluid chamber 2 increases due to vibrations from the engine, the fluid in the chamber 2 passes through the movable orifice 51 to the lower diaphragm chamber 3. I have to move,
Vibrations can be damped by such movement of the fluid, and vibration damping by the elastic members 30 and 40 itself can be reliably performed even at points other than the resonance point.

Moreover, even if the elastic members 30 and 40 are both hard, the damping force is generated due to the movement of the fluid, resulting in a soft mount, and the mount itself has good durability.

Furthermore, the base member 10 is composed of a cylinder 11, and an annular clamping part 12 with a U-shaped cross section that is open inward is formed at the bottom of the cylinder 11, and a diaphragm 6 is installed in the C-shape 13 of the clamping part 12.
While inserting the peripheral edge of the cylindrical body 11 and crimping it together, the cylindrical body 11
Since the 7-run no. 15 is formed on the upper part of the 7-run no. 15 and is configured to be bolted to the vehicle body frame through the mounting holes 16. It can be easily connected to the vehicle body frame.

As is clear from the above description, according to the present invention, the elastic member that connects the base part and the mounting part of the fluid-filled engine mount is configured in two stages, upper and lower, and an orifice is provided in the center between the upper and lower elastic parts. The formed partition plate is interposed and supported, and a diaphragm is attached to the base member, so dynamic characteristics can be arbitrarily selected and durability can be improved.
The diaphragm is constructed of a cylindrical body with a U-shaped cross-sectional clamping part that is open inward at the bottom, making it easy to attach the diaphragm to the base member, and it can also be attached to a fixed member such as the vehicle body. The base member can be easily connected to the base member at the flange portion without performing any cutting.

[Brief explanation of drawings]

1 and 2 show embodiments of the present invention.
The figure is a half-cut plan view of a fluid-filled engine mount according to the present invention, FIG. 2 is a sectional view taken along the line 2--2 in FIG. 1, and FIG. 3 is a central longitudinal sectional view showing a conventional example. In the drawing, 1 is a fluid-filled engine mount, 2 and 3 are fluid chambers, 10 is a base part, 11 is a cylindrical body, 12 is a clamping part,
15 is a flange portion, 20 is a mounting member, 30 and 40 are elastic parts, 50 is a partition plate, 51 is an orifice, 60 is a diaphragm, and 61 is a cover. Patent applicant: Honda Motor Co., Ltd., Hokushin Kogyo Co., Ltd., agent: Patent attorney (2) 1) Japan Patent attorney: Kuni Ohashi Atsume Patent attorney: Yu Koyama

Claims (2)

[Claims] (1) A mounting member connected to the engine and a base member on which the engine is mounted are connected by an elastic member that can be elastically deformed by transmission of vibration to form a chamber inside, and a fluid is sealed in the chamber. In the fluid-filled engine mount, the elastic member is composed of two stages of upper and lower elastic members, and a partition plate is interposed and supported between the upper and lower elastic members to define a fluid chamber in the upper and lower sides, and the partition plate is provided with a fluid chamber. A fluid-filled engine mount characterized in that an orifice is formed to communicate upper and lower fluid chambers, and a diaphragm is attached to the base structure to bulge upward and face the lower fluid chamber. (2) A mounting member connected to the engine and a base member on which the engine is mounted are connected by an elastic member that can be elastically deformed by transmitting vibrations to form a chamber therein, and a fluid is sealed in the chamber. In the fluid-filled engine mount, the elastic member is composed of upper and lower elastic members, and a partition plate is interposed and supported between the upper and lower elastic members to define a fluid chamber in the upper and lower sides, and the partition plate An orifice is formed in the base member to communicate the upper and lower fluid chambers, and the base member is made up of a cylindrical body formed with a flange part in the upper part and a holding part with a U-shaped cross section that is open inward in the lower part. The peripheral edge of the diaphragm that bulges upward and faces into the lower fluid chamber is inserted into the U-shape of the clamping part of the base member, and is caulked and connected to clamp the diaphragm, and the flange part of the base member A fluid-filled engine mount characterized by having a connecting portion to a fixed member side such as a vehicle body side.