JP2678312B2 - Vehicle engine mounting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle engine mount device for reducing vibration from an engine mounted on a vehicle.

(Prior Art) When an engine is mounted on a vehicle, it is mounted between the engine and the vehicle body side through an elastic member so as to absorb vibration due to a sudden torque of the engine.

FIG. 9 shows this conventional portion. As shown in this figure, a mount member 2 is provided at the tip of a mounting bracket 1 fixed to the engine. Inside the mount member 2, a hard mount rubber 4 that supports the bearing 3 in an eccentric position is attached. Another mount rubber 4a is welded above and below the mount rubber 4 supporting the bearing 3, and a bush slit 4b is formed so as to be defined by these mount rubbers 4a. 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 that is fastened together with the mount member 2 is U-shaped in order to restrict the upper side of the mount member 2.

When tightening, the mount member 2 and the stopper 6 are tightened together on the bracket 5 so that the weight of the engine is not applied. Since the bearing 3 can be mounted while being eccentric,
The clearance between the top of the stopper 6 and the outer periphery of the mount member 2 is small. However, as shown in FIG. 10, when the weight of the engine is applied after mounting with the support bolts 7 (arrow A), the mount member 2 sinks and the clearance a increases by the offset amount.

Even when the mount member 2 is mounted as described above, the lower bush slit 4b has a slight gap when the engine self-weight is not applied, and when the engine self-weight is applied, the load is reduced by the static spring constant. The mount member 2 is displaced downward by the value divided by (offset amount), and the bush slit 4b widens. Note that the mounting is usually set so that the bearing 3 comes to the center of the mount member 2 in a loaded state. FIG. 8 shows the relationship between the load and the displacement when the conventional mounting device acts, and l ₁ corresponds to the offset amount.

(Problem to be Solved by the Invention) However, as described above, since the clearance a becomes large after installation, the displacement of the engine becomes too large and vibration is absorbed when a sudden torque is generated in this installation state. Will be difficult. Further, if the spring constant of the mount rubber 4 is reduced to restrict the displacement, the effect of the cushion cannot be obtained, and the external force is transmitted to the peripheral members, which easily causes distortion.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an engine mount device for a vehicle in which the above inconvenience is improved and the stopper is further provided with a damper function to reduce engine vibration.

(Means for Solving the Problems) In order to achieve the above object, the present invention has an outer cylinder of a mount member welded to an engine side bracket, and an inner cylinder of the mount member has a space above and below the outer cylinder. Eccentrically supported downward by a displaceable mount rubber, and a through hole coaxial with the inner cylinder is provided at the center of the side surface of the U-shaped stopper plate straddling the outer cylinder, and a fixing hole is provided at the end. After the damper formed of an elastic member and a weight is detachably attached to the upper center of the stopper plate, the stopper rubber is attached to the lower center, and the inner cylinder and the stopper plate are axially attached to the vehicle body side bracket. The stopper plate is fixed at a fixed position and fixed by the fixing hole.

(Operation) With this configuration, the engine's own weight may be applied when the engine-side bracket and the vehicle-body-side bracket are connected, and the stopper plate is attached regardless of the position of the stopper plate. Direction B (see Fig. 5)
Rotate to and fix the bolt by inserting a bolt into the fixing hole.

Since the inner tube of the mount rubber comes to the center of the mount member when it is axially mounted, the clearance between the stopper plate and the outer tube in this state is different from that in the installed state, and it is possible to reduce the clearance in the installed state. To be able to absorb vibration.

When the engine starts operating, a load is applied to the mount member due to vibration, torque during rapid acceleration / deceleration, and the like. When the mount member moves upward, it collides with the stopper rubber. Further, when the upward fluctuation force is strong, the damper including the elastic member and the weight is swung. As a result, vehicle body fluctuation due to engine vibration and torque is reduced.

(Embodiment) Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

First, as shown in FIG. 4, the engine side bracket 8
A mount member 9 is welded to. Mount member 9
Is provided inside the outer cylinder 10 such that the inner cylinder 12 is eccentric downward by the mount rubber 11 separated from the upper and lower walls of the outer cylinder 10 so as to be swingable. Mount rubber 11a, 11b also on this upper wall and lower wall
Are welded (see FIG. 3). A U-shaped stopper plate 13 extending over the mount member 9 is pivotally attached to the inner cylinder 12 at the insertion hole 13a.

The stopper plate 13 is provided with fixing holes 13b at the end portions of both side plates, and as shown in FIG. 1, the central inner surface of the stopper plate 13 contacts the outer peripheral surface of the mount member 9. The stopper rubber 14 is attached. A damper 17 including an elastic member 15 and a weight 16 is provided on the outer surface of the center.
Are detachably attached.

A support hole 19 and a fixing hole 20 are formed in the bracket 18 on the vehicle body side.

As shown in FIG. 5, the mounting member 9 is attached by fastening it to the bracket 18 together with the stopper plate 13 by the support bolt 21. When the support bolt 21 is inserted into the inner cylinder 12, the inner cylinder 12 is eccentric with respect to the mount member 9, and the stopper plate 13 cannot be installed above the mount member 9, but 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 to be 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 comes to the center of the mount member 9 in the mounted state. FIG. 6 is a schematic diagram when the engine 23 is installed on the vehicle body.

In this manner, the assembled structure, as shown in FIG. 2, the clearance m ₁ of the mount rubber 11 and the mount rubber 11b, and a clearance m ₂ between the stopper rubber 14 and the mount member 9, a mounting member The clearance m ₁ inside is sufficiently large.

When the mount member 9 vibrates upward due to engine torque fluctuation, it first collides with the stopper rubber 14.
Next, the mount rubber 11 contacts the mount rubber 11b in the mount member 9. Due to the vibration of the mount member 9, the damper 17 provided on the stopper plate 13 swings. The damper 17 acts via the stopper rubber 14 due to a sudden torque fluctuation, but also absorbs the vibration transmitted directly. The displacement of the mount member 9 due to the load is shown in the graph of FIG. The lengths l ₁ and l ₂ of the graph correspond to the clearances m ₁ and m ₂ , respectively. In this case, the clearance m ₂ between the mount member 9 and the stopper plate 13 can be set arbitrarily, and the displacement of the mount member 9 can be reduced and vibration can be reduced even if the torque fluctuation due to the engine is large. Further, the characteristics against vibration can be changed by changing the types of the mount rubbers 11 and 11b and the stopper rubber 14. 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 attachable and detachable, compatibility with other models is improved.

(Effect of the invention) Since the present invention is configured as described above, the mounting work is facilitated because the stopper plate is positioned and fixed after the mounting member is axially mounted in the mounting process. The clearance between the mounting member and the mounting member can be substantially reduced. In the installed state, the stopper rubber attached to the lower center of the stopper plate with a small clearance and the damper attached to the upper center of the stopper plate cooperate with each other to oscillate and swing, resulting in torque fluctuation. Vibration can be absorbed smoothly even if it is large.

Also, because it can absorb a lot of specific vibrations,
Further effects can be obtained by adjusting to the vibration frequency peculiar to the vehicle body. Also, since the damper can be replaced, compatibility is obtained and it can be applied to other models.

[Brief description of the drawings]

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 that of FIG. 1, and FIG.
FIG. 4 is a side sectional view of the drawing, FIG. 4 is a side view of the mounting member of the embodiment before mounting, FIG. 5 is a side view of the mounting member of the embodiment after mounting, and FIG. FIG. 7 is a side view showing the same, 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, and FIG. 9 is an exploded view of the conventional engine mount device. The figure is an assembly drawing of that of FIG. 9 …… Mounting member 13 …… Stopper plate 14 …… Stopper rubber 15 …… Elastic member 16 …… Weight 17 …… Damper 18 …… Body side bracket

Claims (1)

(57) [Claims] 1. An outer cylinder of a mount member is welded to an engine side bracket, and an inner cylinder of the mount member is supported in the outer cylinder by eccentric downward by a displaceable mount rubber. , A U-shaped stopper plate straddling the outer cylinder is formed with a through hole coaxial with the inner cylinder in the center of the side surface, and a fixing hole is formed at the end, and an elastic member and a weight are provided above the center of the stopper plate. A removable damper is attached, a stopper rubber is attached to the lower center, the inner cylinder and the stopper plate are axially attached to the vehicle body side bracket, and then the stopper plate is fixed in position and fixed with fixing holes. An engine mount device for a vehicle characterized by: