JPS62137442A - Mounting device for automobile engine - Google Patents

Abstract

PURPOSE:To achieve a sharp reduction in the transmission of vibration by providing a fixed casing, which has a hollow chamber and whose one side in the up and down direction is opened, and a movable resistance plate inserted in the hollow chamber, and filling a viscous body of high viscosity in the hollow chamber so as to be hermetically sealed. CONSTITUTION:A relative displacement in the A direction is caused on the engine mounting device 1 by the rolling of an engine or the unevenness of road surfaces. By the relative displacement, a rubber block 2 is subjected to shearing deformation, which operates a viscous shearing resistance generating device R integrally fitted to the mounting device 1. In the viscous shearing resistance generating device R, a relative displacement is caused between a fixed casing 9 on the vehicle body side and a movable resistance plate 17 on the engine side which is inserted into the hollow chamber 6 of the fixed casing 9 so as to keep minute clearances S between the wall surfaces of the hollow chamber. In the minute clearances S, a viscous body 19 of high viscosity is filled up, herein viscous shearing resistance force is caused to attenuate low frequency vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automobile engine mount device for elastically supporting the engine of a personal vehicle.

<Prior art> In general, automotive engine mounting devices are designed to: ■ Dampen low-frequency vibrations with large amplitude (displacement) that occur in the engine when starting the engine (idling) or suddenly starting, and direct the vibrations toward the vehicle body. Decreasing transmission, ■When driving,
To attenuate large-amplitude low-frequency vibrations that occur on the vehicle body side due to road surface irregularities, insulate the transmission of the image to the engine side, and prevent resonance of the engine due to the vibration J; For high-frequency vibrations with small amplitudes that occur, characteristics such as damping the imaging and suppressing the vibrations from propagating to the passenger compartment and increasing the interior IJB are required.

In order to satisfy the above requirements, in recent years there have been various fluid-filled engine mount devices that incorporate a hydraulic damping mechanism that acts on a rubber elastic body interposed between the engine and the vehicle body by changing the height of this rubber elastic body. Proposed.

An example of this fluid-filled engine mount device is one described in Japanese Patent Laid-Open No. I+059-8529.

That is, the metal fittings on the engine side are attached to the engine via bolts. The metal fittings on the vehicle body side are attached to the vehicle frame or the like via bolts. A hollow mount rubber is vulcanized and bonded between the two metal fittings. The engine side metal fitting is provided with a partition plate and a diaphragm. Thus, chambers are formed on the upper and lower sides of the partition plate, and each! The inside is filled with working fluid.

The partition plate has a hole that acts as an orifice, and an I-tube is fixed thereto, and the base portion communicates the two chambers.

Above) The mounting device consists of a hollow structure, in which the remount rubber deforms due to engine vibrations and changes the volume of one chamber, allowing the bamboo fluid to move between the two chambers through the hole in the cylinder. The vibration of the engine is damped by the action of the orifice.

<Problems to be Solved by the Invention> By the way, in the J3, the conventional engine mount device in which the hydraulic damping mechanism starts acting at the same time as the height of the mount rubber starts to change (the volume of both chambers changes) The change in the spring constant of the mount rubber is proportional to the change in the damping force, and if the spring constant of the mount rubber is set too high to sufficiently damp low frequency vibrations with large amplitudes, high frequency vibrations with small amplitudes If the spring constant of the mount rubber is set small to sufficiently attenuate high-frequency vibrations, it will not be possible to sufficiently attenuate low-frequency vibrations, etc. There is a problem in that the setting of the spring constant of the rubber has a great effect on the vibration damping ability.

In addition, in mounting devices with a built-in hydraulic damping mechanism, there is a problem that the force generated by the working fluid filled inside the mount rubber affects the durability of the rubber itself, and the device itself becomes complicated. There is also the problem of increasing the size.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a single counting device that satisfies the above-mentioned requirements.

According to the present invention, the object is to provide a rubber block, an engine-side mounting plate fixed to the upper surface of the rubber block, and a mounting plate fixed to the lower surface of the rubber block and bent at both ends. In an automobile engine mounting device comprising a vehicle body side mounting plate having a rising portion and a stopper rubber body inside the rising portion, one side of the mounting device has a hollow opening in one of the vertical directions. A movable resistance plate is inserted into the hollow chamber by maintaining a minute gap between the fixed casing having a chamber and the plate surface and the wall surface of the hollow chamber, the high viscosity viscous material filled in the hollow chamber, and the hollow chamber. A viscous breaking resistance generating device consisting of a seal body that seals the FI1 port side of the chamber attaches the fixed casing to either the engine side mounting plate or the vehicle body side mounting plate, and attaches the movable resistance plate to either the engine side mounting plate or the vehicle body side mounting plate. This is achieved by an automobile engine mounting device characterized in that the two parts are fixedly attached to one another and are integrally mounted.

In the above configuration, the high viscosity material filled in the hollow hole of the fixed casing has a viscosity of, for example, 10,000 to 100,000 poise, and polyolefins, polysiloxanes, etc. are used.

This highly viscous viscous body is interposed in the minute gap between the movable resistance plate and the wall of the hollow chamber of the fixed casing, and when the movable resistance plate and the wall of the hollow chamber are relatively displaced at a constant speed, the resistance force of the viscous body is Depends on the frequency, the resistance force at high frequencies is low l1t
The characteristic that 1lff is extremely small compared to the low resistance force at vJ number, in other words, the low resistance force against low frequency vibration with large amplitude (displacement) shows an extremely larger value than the resistance force against high frequency vibration with small amplitude. It has the following.

The characteristics of the high-viscosity viscous body described above correspond to the characteristics required of the device for the engine mount 1 described above.

The engine mount device of the present invention is fixed between the engine and the vehicle body with the plate surface of the movable resistance plate aligned with the axial direction of the engine roll axis.

Effect> Preferably two engine mount devices are used to support the engine on the vehicle body from diagonal directions.

In this state, if a low frequency vibration with a large amplitude occurs in the engine or the vehicle body, a large relative displacement occurs between the engine and the vehicle body. Due to this relative displacement, one block of the engine mount device is sheared and deformed, and a viscous shear resistance generating device integrally attached to the mount device is actuated.

In the viscous shear resistance generating device, there is a gap between a fixed casing fixed to either the engine side mounting plate or the vehicle body side mounting plate and the wall surface of the hollow chamber fixed in the hollow chamber of the fixed casing. A large relative displacement occurs between the bolt and the movable resistance plate inserted with a small gap between the bolt and the bolt.

However, since high viscosity exists in the minute gap, a viscous shear resistance force is generated there, and the low frequency vibration is significantly attenuated by the resistance force.

Further, in the case of high-frequency vibrations with small amplitudes occurring in the engine, the damping effect due to the generation of viscous shear resistance force is not performed, and the vibrations are absorbed by the rubber block having a set spring constant.

<Embodiments> The present invention will now be described with reference to FIGS. 1 to 4 of the accompanying drawings showing preferred embodiments thereof.

In the figure, 1 is an engine mount device.

2 is a rubber block of the mounting device 1.

3 is an engine side mounting plate that is vulcanized and fixed to the upper surface of the rubber block 2, and the end of the plate 3 is attached to the corresponding mounting plate 3.
A more protruding bolt 4 is fixed.

Reference numeral 5 designates a vehicle body side mounting plate which is vulcanized and fixed to the lower surface of the rubber block 2, and the mounting plate 5 is provided with bent upright portions 6 at both ends thereof.

Reference numeral 7 denotes a bolt fixed to the vehicle body side mounting plate 5 with its end portion protruding toward the lower surface side of the mounting plate 5.

Reference numeral 8 denotes a stopper rubber body which is vulcanized and fixed to the inside of the bent upright portions 6 at both ends of the vehicle body side mounting plate 5.

In the above configuration, when the engine is mounted on the mounting device 1, the rubber block 2 is sheared and deformed by the weight of the engine, and the pole 1 is fixed to the engine side mounting plate 3.
-4 and the bolt 7 fixed to the vehicle body side weir 4 plate 5 are tilted in advance in consideration of the amount of deformation in the state before the opening so that the bolt 7 fixed to the vehicle body side weir 4 plate 5 is located on the same axis.

Reference numeral 9 denotes a fixed casing, and the fixed casing 9 is fixed to a base body 12 having a horizontal portion 10 and a vertical portion 11 formed by bending one end of the horizontal portion 10 and a vertical portion 11 of the base body 12. The fixed casing 9 is made up of a rectangular flat part 13 and a frame 15 having rising parts 14 on three sides of the flat part 13.
The vertical part 11 of the base body 12 and the rectangular plane part 13 of the frame body 15
It has a hollow chamber 16 with a rectangular cross section that opens upward and is formed by a rising portion 14 .

The fixed casing 9 is positioned on one side of the mounting device 1 with the horizontal portion 10 of the base 12 fixed to the lower surface of the vehicle body side mounting plate 5.

Reference numeral 17 denotes a movable resistance plate, one end of which is fixed to the engine side mounting plate 3, and the other end with a curved portion 18 inserted into the hollow space 16 of the fixed casing 9. The resistance plate 17 is inserted with a movement area left in the longitudinal direction of each of the resistance plates 16 and a small gap S maintained between the plate surface of the resistance plate 17 and the wall surface of the hollow chamber 16.

Reference numeral 19 denotes a highly viscous material filled in the hollow chamber 16 .

Reference numeral 20 denotes a sealing body which is capped and fixed to the fixed casing 9 to cover the opening of the hollow chamber 16, and the sealing body 20 has sulins 1 to 21 attached to the movable resistive plate 17 in order to allow the movable resistive plate 17 to move. It is formed over a moving area.

The fixed casing 9 is fixed to the vehicle body side mounting #i5, one end is fixed to the engine side mounting plate 3, and the other end is inserted into the hollow chamber 16 of the fixed casing 9 while maintaining a small gap S with the wall surface of the hollow chamber. A viscous shear resistance generating device is constructed by a movable resistance plate 17 , a high-viscosity viscous material 19 filled in the hollow chamber 16 , and a sealing body 20 fixed to the fixed casing 9 so as to cover the opening of the hollow chamber 16 . R is configured.

The engine mount device 1 having the above-described configuration is fixed between the engine E and the vehicle body B with the plate surface of the movable resistance plate 17 aligned with the axial direction of the engine roll axis (not shown).

Figure 4 shows the installation state of the rubber block 2.
The engine side mounting plate 3 fixed to the upper surface of the engine E is fixed to the bracket 22 fixed to the engine E with bolts 4 and nuts 1 to 23. Attach the vehicle body side mounting plate 5 fixed to the bottom surface of the rubber block 2 to the vehicle body side bracket 24 with the bolts 7 and nuts 25.
Fix it with.

Then, the vehicle body side bracket 24 is fixed to the upper surface of the single suspension frame 21 mounted on the side member 26 of the middle rest 8, and the engine E is mounted on the engine mount device 1 in an inverted V.
Provides elastic support in the shape of a letter.

Therefore, in this embodiment, if a low frequency image with a large amplitude occurs on the engine E due to rolling of the engine E or on the suspension frame 27 of the vehicle body B due to unevenness of the road surface, etc. A large relative displacement occurs between the suspension frame 27 and the suspension frame 27 in the forward direction.

Due to this relative displacement, the rubber block 2 of the engine mount device 1 is sheared and deformed, and the viscous crack/V break resistance generating device R, which is integrally attached to the mount device 1, is actuated.

The fixed casing 9 fixed to the viscosity [in the shear resistance generating device R, the vehicle body side weir ζ] plate 5 and the engine side mounting plate 3
A large relative displacement occurs between the movable resistance plate 17 which is fixed to the movable resistance plate 17 and which is inserted into the hollow chamber 16 of the fixed casing 9 with a minute gap S maintained between it and the wall surface of the hollow chamber.

Since the high viscosity viscous body 19 is present in the minute gap S,
A viscous shear/V breakage resistance force is generated there, and low frequency imaging is significantly attenuated by this resistance force.

In the preferred embodiment, the fixed casing 9 is mounted on the vehicle body side mounting plate 5, and the fixed casing 9 is mounted on the engine side mounting plate 3.
7 are respectively fixed, but the present invention is not limited to this. For example, the fixed casing 9 may be fixed to the engine opening number f=J If 3, and the movable resistance plate 17 may be fixed to the vehicle body side mounting plate 5. J: Yes.

<Effects> The engine mount device of the present invention has the above-mentioned configuration and operation, and has the following various excellent effects.

■Low-frequency vibrations with large amplitude that occur in the engine or the vehicle body are greatly attenuated by the viscous shear resistance generated in the viscous shear resistance generator that is integrated with the mount device, so the vibrations are transmitted to the vehicle body. transmission or transmission to the engine side is significantly reduced.

■ Utilizes the viscous shear resistance of a highly viscous material, so
41. compared to the conventional one using orifice action. S construction is easy and can be made compact.

■ Can be installed on existing engine mount equipment.

[Brief explanation of drawings]

FIG. 1 is a front view showing the engine mount device of the present invention;
FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along the line ■--■ of FIG. 1, and FIG. 4 is a diagram showing the state in which the engine mount device is installed. 1...Engine mount device, 2...
Rubber block, 3...Engine side mounting plate, 5.
...Tube measurement plate, 9...Fixed casing, 16...Hollow chamber, 17...Movable resistance plate, S...・Minute gap, 19... High viscosity viscous body, 20... Seal body, R...
・Viscosity "Shear resistance generator. Figure 1 HI] Figure 3 Figure 4

Claims (1)

[Claims] A rubber block, an engine-side mounting plate fixed to the upper surface of the rubber block, and a vehicle body side fixed to the lower surface of the rubber block, having bent rising parts at both ends, and a stopper rubber body inside the rising parts. In a mounting device for an automobile engine that includes a mounting plate, one side of the mounting device has a fixed casing that has a hollow chamber that opens in one direction in the vertical direction, and a plate surface that has a microscopic structure between the wall surface of the hollow chamber and the fixed casing. A viscous shear resistance generating device consisting of a movable resistance plate inserted into the hollow chamber while maintaining a gap, a high viscosity material filled in the hollow chamber, and a sealing body sealing the opening side of the hollow chamber is fixed. A mounting device for an automobile engine, characterized in that a casing is integrally mounted to one of the engine side mounting plate and the vehicle body side mounting plate, and a movable resistance plate is fixed to the other.