JPH02286428A - Engine mount device for vehicle - Google Patents

Abstract

PURPOSE:To efficiently reduce vibration of an engine by moving a mount member upward in accordance with the fluctuation of engine torque to abut it on a stopper rubber, thereby oscillating a damper consisting of an elastic member and a weight. CONSTITUTION:When a mount member 9 provided to an engine side bracket 8 is oscillated upward in accordance with the fluctuation of engine torque, the mount member 9 is abutted against a stopper rubber 14 provided on the central inner side of a stopper plate 13 laid across the mount member 9 and pivoted on an inner cylinder 12. Further, respective mount rubbers 11, 11b provided to upper and lower walls of the mount member 9 are abutted on each other. As a result, a damper 17 consisting of an elastic member 15 and a weight 16 provided on the central outer side of the stopper plate 13 is oscillated to absorb vibration. The buffering characteristic can thus be adjusted by changing the types of respective mount rubbers 11, 11b and the stopper rubber 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle engine mount device for reducing vibrations from an engine mounted on a vehicle.

(Prior Art) When an engine is mounted on an automobile, an elastic member is installed between the engine and the vehicle body to absorb vibrations caused by sudden torque of the engine.

FIG. 9 shows this conventional location.

As shown in this figure, a mount member 2 is provided at the tip of a mounting bracket 1 fixed to the engine. A hard mount rubber 4 is attached inside the mount member 2 and supports the bearing 3 in an eccentric position. Further, another mount rubber 4a is welded above and below the mount rubber 4 that supports the bearing 3.
A bush slit 4b is defined by these. On the other hand, a mounting hole 5a is formed in the vehicle body side bracket 5 to which the mount member 2 is attached, and a stopper 6, which is fastened together with the mount member 2, is U-shaped in order to restrict the upper part of the mount member 2.

When tightening, the mount member 2 and the stopper 6 are tightened together to the bracket 5 without applying the weight of the engine. Since the bearing 3 is mounted eccentrically, the clearance between the top of the stopper 6 and the outer periphery of the mount member 2 is small.However, as shown in Figure 1θ, the support bolt 7 is used to attach the bearing 3, which is mounted eccentrically due to the weight of the rear engine. When this occurs (arrow A), the mount member 2 sinks and the clearance a increases by the offset amount.

Even with the mount member 2 attached in this way,
When the engine's own weight is not applied, the lower bushing slit 4b is a small gap, and when the engine's own weight is applied, the mount member 2 is displaced downward and offset by the value obtained by dividing the load by the static spring constant. Amount) The bush slit 4b widens. Note that the mount rubber is normally set so that the bearing 3 is located at the center of the mount member 2 under load. FIG. 8 shows the relationship between load and displacement when a conventional mounting device is applied, and fLl corresponds to the amount of offset.

(Problem to be solved by the invention) However, as mentioned above, after installation, the clearance a
As a result, when a sudden torque is generated in this installed state, the displacement of the engine becomes too large, making it difficult to absorb vibrations. Furthermore, if the spring constant of the mount rubber 4 is reduced to restrict displacement, the effect of the bushing will not be obtained, and external force will be transmitted to the surrounding members, making it likely that distortion will occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine mount mounting structure that improves the above disadvantages and further provides a damper function to the stopper to reduce engine vibrations.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a mount member 9 provided on the engine side that is pivoted to a vehicle body side bracket 18, and a mount member 9 provided in the vicinity of the upper part of the mount member 9. A damper 17 consisting of an elastic member 15 and a weight te is attached to the upper part, and a stopper plate 13 with a stopper rubber 14 arranged at the lower part is attached.
It is characterized by being fixed to the vehicle body side bracket 1B.

(Function) First, when attaching the mount member 9 to the vehicle body side bracket 18, when the engine is installed in the vehicle body and the position of the mount member 9 is displaced downward due to the engine's own weight, the stopper plate 13 is moved from the mount member 9. Place them above and align them.

When the engine starts operating, a load is applied to the mount member 9 due to vibrations, torque during sudden acceleration and deceleration, and the like. At this time, the mount member 9 moves upward.

Stopper rubber! Collision with 4. Furthermore, the damper 17 consisting of the elastic member 15 and the weight 1B is swung.

This reduces fluctuations due to vibration and torque.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 7.

First, as shown in FIG. 4, a mount member 9 is welded to the engine side bracket 8.

The mount member 9 is swingably provided inside the outer cylinder 10 with the inner member 12 eccentrically located downward by means of mount rubber 11 released from its upper and lower walls. Mounting rubbers lla and llb are also welded to the upper and lower walls (see Fig. 3), and the U-shaped stopper plate 13 that spans the mount member 9 is inserted into the inner cylinder 13 at the insertion hole 13a. It is pivotally connected.

The stopper plate 13 has fixing holes 13b at the tips of both side plates, and as shown in FIG. A stopper rubber 14 is attached. Further, a damper 17 consisting of an elastic member 15 and a weight 1B is detachably attached to the central outer surface.

Note that a support hole 18 and a fixing hole 20 are made in the bracket 1 on the vehicle body side.

The mounting method of the mount member 9 is as shown in FIG.
The support port 21 is tightened and fixed to the bracket 18 together with the stopper plate 13. At the time when the support port 21 is inserted into the inner cylinder 12, the inner cylinder 12 is in an eccentric position with respect to the mount member 9, and the stopper plate 13 is placed in a position eccentric to the mount member 9.
Although the stopper plate 13 cannot be installed above the engine, when the engine's own weight is applied, the stopper plate 13 can be rotated upward, and is rotated in the direction of arrow B and fixed by the fixing bolt 22. At this time, the mount rubber 11 has the shape shown in FIG. 3, and the inner cylinder 12 is located at the center of the mount member 9 in the attached state. FIG. 6 is a schematic diagram of the engine 23 installed in the vehicle body.

In the structure assembled in this way, as shown in FIG. 2, the clearance m1 between the mount rubber U and the mount rubber 11b and the clearance m2 between the stopper rubber 14 and the mount member 9 are defined as The clearance m1 is made sufficiently large.

When the mount member 9 vibrates upward due to engine torque fluctuations, the mount member 9 first collides with the stopper rubber 14.
Next, the mount rubber 11 contacts the mount rubber Ilb within the mount member 9. In response to the vibration of the mount member 9, a damper 17 provided on the strut plate 13 swings. The damper 17 acts via the stopper rubber 14 due to sudden torque fluctuations, but also absorbs directly transmitted vibrations. The displacement of the mount member 9 due to the load is shown in the graph of FIG.

The length of the graph l t * Q 2 is the clearance m1. Corresponds to m2. In this case, the mount member 9
The clearance m2 between the mount member 9 and the stopper plate 13 can be arbitrarily set, and even if the torque fluctuation caused by the engine is large, the displacement of the mount member 9 can be made small, and vibrations can be reduced. Also, mount rubber 11. llb,
By changing the type of stopper rubber 14, the vibration characteristics can be changed. The slope of the graph in this case is different.

Further, the stopper rubber 14 and the elastic member 15 may be baked together, but by making the damper 17 detachable, compatibility with other models is improved.

(Effects of the Invention) Since the present invention is configured as described above, the damper attached to the upper part of the stopper plate cooperates with the stopper rubber and swings due to vibration, so that the clearance can be substantially reduced. This is the same as what we did previously, and even if the torque fluctuations are large, vibrations can be smoothly absorbed. Furthermore, since it is possible to absorb a large amount of specific vibrations, by matching the frequency to that vibration, a negative layer effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an engine mount device according to an embodiment of the present invention, FIG. 2 is a front view of the engine mount device of FIG. 1, and FIG.
FIG. 4 is a side view of the mount member of the embodiment before it is installed, FIG. 5 is a side view of the mount member of the embodiment after it is installed, and FIG. 7 is a graph showing the characteristics of the engine mount device of the embodiment, FIG. 8 is a graph showing the characteristics of the conventional engine mount device, FIG. 9 is an exploded view of the conventional engine mount device, and FIG. The figure is an assembly diagram of the one shown in FIG. 9. 9...Mount member 13...Stopper plate 14...Stopper rubber 15...Elastic member 16...Weight 17...Damper 18...Vehicle side bracket Patent applicant Suzuki Motor Corporation No. 6 figure Φ♀8P♀≧So

Claims (1)

[Claims] (1) A stopper plate in which a mount member provided on the engine side is pivoted to a bracket on the vehicle body side, and a damper made of an elastic member and a weight is mounted on the upper part of the mount member and a stopper rubber is arranged on the lower part, in close proximity to the upper part of the mount member. A vehicle engine mount device, which is fixed to a vehicle body side bracket.