JPS59144838A - Fluid-containing power unit mount device - Google Patents

Abstract

PURPOSE:To reduce noise in a car room by disposing a liquid chamber and a pressure control chamber through a movable plate on a fluid-containing power unit mount device having an orifice and a diaphragm to absorb high-frequency slight vibration. CONSTITUTION:A mount rubber 13 having a hollow portion is adhered by vulcanization between a base plate 11 fixed to a power unit and a base plate 12 fixed to a car body, and a partition plate 15 having an orifice 14 for attenuating low-frequency vibration and a diaphragm are disposed therebetween. An incompressible fluid is accomodated in the interior of the hollow portion. A stopper 24 U-shaped in section is fixed to the base plate 12, and a movable plate 25 is disposed between the upper edge 24a and the lower edge 24b to partition off a pressure control chamber 26. The movable plate 25 has a liquid path comprising a through hole 27a or a bead 27b, thereby to always connect the liquid chamber 20 to the pressure control chamber 26 to quickly balance pressure therein. Accordingly, high-frequency slight vibration can be absorbed by the movable plate 25 adapted to freely move between the upper edge 24a and the lower edge 24b of the stopper.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power unit mount paper which absorbs high-frequency micro-vibration input even when a lifting torque is applied to a power unit.

An example of a conventional fluid input υ/ξ war unit mounting device 1C is shown in FIG. That is, a board 4 and a frame board 5 are adhesively bonded to both sides of an annular board 1 consisting of a pair of curved boards through mount rubbers 2 and 3, and a partition plate 6 is attached to the stoppers la and lb at the inner edge of the board 1. The spacing between the board 4 and the frame plate 5 is maintained by a rod 7.
An orifice 10 is formed between the liquid chamber 8 and the partition plate 6 to communicate the liquid chamber 8 and the sub-chamber 9.

This type of fluid-filled power unit mounting device is
For example, if the board 1 is installed on the power unit side and the board 4 is installed on the vehicle body side to equip the vehicle, then the liquid will exert a damping effect against low frequency vibration input by passing through the oriice 10. , in response to a high frequency fine motion input, the partition plate 6 moves slightly between the stoppers la and lb to close the liquid chamber 8.
It also absorbs pressure fluctuations in the auxiliary chamber 9, and prevents the flow resistance of the orifice 10 ((caused by this. There is.

However, in such a conventional fluid unit mounting system, the liquid chamber 8 is filled with an incompressible liquid such as water, and the partition plate 6 forms an orifice 10. Since the structure allows slight movement relative to the base plate 4, when lifting torque is applied to the power unit during acceleration/deceleration, starting/stopping, climbing/descending, etc., either the liquid chamber 8 or the sub-chamber 9 Until the volume of one side is balanced with the other through the orifice 10, which is set to effectively attenuate low frequency input, the partition plate 6 is placed in the suppressed state with one stopper 1a or lb. However, the rigidity of the engine mount increases, which increases the noise inside the vehicle when high-frequency vibrations are input.

The present invention has been made to solve these conventional problems, and the present invention has been made to address these conventional problems. The purpose of the VC is to solve the above problems by providing a pressure regulating chamber through which the pressure is quickly balanced with the moving plate.

The present invention will be explained below with reference to an embodiment shown on the east side.

2) is a diagram showing a first embodiment of the present invention. First, to explain the configuration, ・ξ War Unit) (Mount rubber 13, which has a hollow part inside, is vulcanized and bonded to the board 1, which is written several times on IIJ, and 12, which is written several times on the car body side.) The substrate 11 and the cover 1 are assembled by overlapping the outer circumferences k of the partition plate 15 and the tire flamm 16, each of which has an orifice 14 that is a constriction passage that effectively damps low-frequency vibration input.
Tighten and pinch 9C and 1B between 7 and 9C.

Facing each other, the diaphragm 16 and the partition plate 15 define a primary chamber 9 which at least partially accommodates an incompressible liquid such as water, and the partition plate and the partition plate 5 are used to fill the chamber with a liquid such as water. A liquid chamber 2o is formed.

21 is the board 11 on the power unit side, 22 is the board 12
The bolts (=J bolts) are used to attach each to the vehicle body side.

Reference numeral 23 denotes an embedded ring, which prevents the mount rubber 13 from expanding when it contracts.

A stopper 2 is provided on the inner circumference of the substrate 12 of the liquid chamber 20.
4 is fixed to the substrate 12 by means such as press fitting. The stopper 24 has a U-shaped cross section, with an upper edge 24a1 and a lower edge 24b.
This is provided. The movable plate 25 is provided so that its movement range is limited by )y by the upper edge 24a and lower edge 24b of the stopper, thereby defining a pressure ρ'' constant amount 26. As shown in FIG.
having a liquid chamber 20 and a pressure it in its installed state;
, HD chamber 26 is constantly communicated, and a lifting torque is applied to the nose unit. :, the pressure in the compartments 20, 26 is quickly equalized. The base plate 12 is appropriately provided with tire flams 28 (in the illustrated embodiment, two circular tire diaphragms 28 in the radial direction), which are flexible glands/barrels that absorb hydraulic noise in the pressure adjustment chamber 26. (See Figure 4).Therefore, the pressure adjustment chamber 26 may be in contact with the atmosphere via a diaphragm 28, or a cover 29 may be provided as shown in phantom lines in Figure 2 to control the air. .

Next, the action will be explained.

When low-frequency vibration input acts on the power unit mount device due to uneven road surfaces, engine idling, etc.
This relatively large vibration at the tar position -hρ stretches the mount rubber τ-13 and causes the liquid chamber 20 or the sub-chamber 19 to
The vibration is attenuated by the flow resistance of the liquid orifice 14 and the vibration is suppressed.

When the engine drive V causes a muffled sound, etc.
When the 88-wave micro-vibration input acts on the ξ-war unit mount mounting, the movable plate 25
Absorb the vibration by freely moving the a1 lower meridian 24bl mountain,
In addition, the change in the volume of the pressure adjustment chamber 26 is compensated for by the deformation of the diaphragm 28 to maintain a low IXII property.

When the lift torque of the power unit mount device is applied to the power unit mount device, such as during acceleration/deceleration, starting/stopping, starting/descending, etc., and high-frequency vibration input is also applied, the υ liquid chamber is Pressure fluctuation noise occurs at 20. Then, due to the pressure difference between the liquid chamber 20 and the pressure adjustment chamber 26, the moving plate 25 moves to the upper edge 24a'5 of the stone! , is pressed downward by 24b and temporarily loses its function as the movable plate 25, but the liquid flows through the liquid passage 27 in addition to the orifice 14, and quickly returns to the state of both options 20 and 26. The pressure is balanced, the movable plate 250 function fK: is made to rotate, and the cylindrical wave @ and movement are absorbed. At this time, the deformation of the tire flamm 28 is selected so as to be within a linear range, and hardening of the lower unit mount device is completely prevented.

By the way, when a low frequency vibration is input, the movable plate 25 moves between the upper edge 24a1 and the lower edge 24b of the stopper, and furthermore, the movable plate 25 moves between the upper edge 24a1 and the lower edge 24b of the stopper, and furthermore, the movable plate 25 moves between the upper edge 24a1 and the lower edge 24b of the stopper. Although a decrease occurs in the liquid force 4 flowing through the orifice 14 due to the device W=, since this liquid amount u& is small, it does not pose a problem in terms of usage.

FIG. 5 and FIG. Fix the nuclear container 37 to the soft IV, and completely fill it with a gas having the liquid side and the J side at the gas tank 38.
On the liquid side, a scale-like movable plate 31 surrounding the liquid passage 30 is placed between the upper edge 32a and the lower edge 32b of the stopper 32.
The pressure adjustment chamber 33 is provided with a restricted movement range and is filled with liquid. The same reference numerals as in the first embodiment indicate the same parts. In addition, as shown in Fig. 7, a flexible membrane 3 is applied to the gas.
It is also possible to form closed multi-cell bodies 36 individually spaced apart from each other by ν111.

According to this embodiment as well, the ridge damping force is effectively generated against the low frequency wave υ, and by inputting the itR wave microwave vibration, the vibration can be quickly suppressed even when the lifting torque is applied to the power unit. The effect is similar to that of the left side of the first embodiment. However, in this embodiment, as the pressure in the liquid chamber 20 increases, the pressure of the gas also increases, which tends to deteriorate the power unit mount device's compatibility and its ability to absorb high-frequency vibrations. However, it has the advantage that liquid leakage will not occur if the flexible membrane 34 or 35 is damaged, and furthermore, even if the closed multi-cell membrane 36 and the flexible membrane 35 are partially damaged, the gas will not leak into the liquid chamber. Since the outflow to 20 is suppressed to a very small extent, it is possible to prevent uncoupling that would reduce the damping ability.

As explained above, according to the present invention, the configuration is as follows:
A hollow part is formed inside a mount rubber interposed between the power unit side board and the car body one rule board in an additive contact manner, and a partition plate having an orifice is provided on one of the bases and sides. A liquid chamber is formed between the substrate 1111i and the other substrate, and a secondary chamber defined by a diaphragm is formed in the substrate 1111i provided with a partition plate, and at least part of the liquid chamber and the sub-volume are formed. In a fluid-filled power unit mount device filled with liquid, a pressure adjustment chamber is defined within the liquid chamber by a movable plate having a liquid passage whose movement range is regulated by a stroke, and the liquid chamber is adjusted by the liquid passage. Since the fluid manipulator unit mount device 6 is made to communicate with the pressure adjustment chamber and separate the liquid in the pressure adjustment chamber from the gas by a flexible membrane, 1. e7 - low frequency to the unit mount device. swing N1
When inputting , it effectively injects a trial reduction effect, and when inputting cylindrical frequency fine motion, 'EiJ board production y1-' is applied to 1ff.
It absorbs the vibration by completely preventing l1 integration, and for one-pot torque production IH for the power unit such as application / AS connection, advance / stop, between climbing and descending boards, etc., it is necessary to combine the liquid chamber and the pressure AL adjustment chamber Since the pressure is quickly balanced and high-frequency minute vibrations are absorbed, the effect of reducing single-chamber noise while the vehicle is running can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional fluid-filled engine mount, FIG. 2 is a sectional view showing a first embodiment of the present invention, FIG. 3 is a perspective view of a movable plate, and FIG. 4 is a front view of a board. FIG. 5 is a sectional view showing the second embodiment, FIG. 6 is a sectional view of a mechanism for adjusting pressure, and FIG. 7 is a sectional view showing another structural example of the mechanism for adjusting pressure. 11: Board, 12: Board, 13: Mount Rano-11
4 niorifice, 15: partition plate, 16: diaphragm,
19: Secondary chamber, 24.32: Stopper, 24a, 32a
: Upper edge of stopper, 24b, 32b: Lower edge of stopper,
25. 31 = Movable plate, 26, 33: Pressure adjustment chamber, 27° 30: Liquid passage, 28, 34, 35: Flexible membrane Agent Patent attorney front 1) Toshiyuki (and 1 other person) Figure 1 Figure 2 Figure 4 Figure 8 Figure 5 7 Figure 6 Figure 7

Claims (1)

[Claims] 1. A hollow part is formed inside the mountler/etc. which is interposed by vulcanization adhesion between the board on the side of the hoe unit and the board on the vehicle body side, and an orifice is provided on the side of one of the boards. A partition plate is provided to form a liquid chamber between the other substrate, a sub-chamber defined by a tire plum is formed on the side of the substrate provided with the partition plate, and at least one of the liquid chamber and the sub-chamber is formed. In a fluid-filled power unit mount device in which both parts are filled with liquid, a pressure adjustment chamber is defined in the liquid chamber by a movable plate having a liquid passage whose movement range is regulated by a stopper, and the liquid is 1. A fluid-filled power unit mount device, characterized in that a chamber and a pressure adjustment chamber are communicated with each other, and the liquid in the pressure adjustment chamber is separated from gas by a flexible membrane.