JPH10299833A - Engine mount device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently secure strength and rigidity on the side of a mount insulator by a single stay by making a fixed end of the outer tube side of the stay interposed between an outer peripheral part of an outer tube of the mount insulator and a car body side member and connect both of them to each other contact with an outer peripheral surface of the outer tube along the peripheral direction. SOLUTION: An engine mount device 1 arranged between an engine 2 and a car body-side side-member 3 has an outer tube 4 and an inner tube 5 and it is furnished with a mount insulator 7 constituted by interposing a mount rubber 6 between both of the tubes 4, 5. Thereafter, an engine unit installation part 9 having a pin part 8 to be inserted into the inner tube 5 is fixed on the engine 2, and an outer peripheral part of the outer tube 4 is connected to the car body side member 3 through a stay 10. In this case, the stay 10 is formed roughly in a triangular shape seen at a flat level, extended in the car width direction from the outer tube 4, it base end part is formed in a circular arc surface corresponding to the outer peripheral surface of the outer tube 4, and it is fixed on a lower side part in the peripheral direction of an end part outer peripheral surface of the outer tube 4 by welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine mount device interposed between an engine unit and a vehicle body-side member to reduce vibration transmitted from the engine unit to the vehicle body.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional engine mounting apparatus of this type. The engine mount device a includes a mount insulator g in which an elastic body d is interposed between an outer cylinder b and an inner cylinder c and is fixed to a vehicle body-side member e via a mounting bracket f. An engine unit mounting portion i having a pin portion h inserted into the inner cylinder c and fixed to the engine unit side, and being interposed between the outer peripheral portion of the outer cylinder b and the vehicle body-side member e to connect the two. The mounting bracket f of the vehicle body-side member e is attached to the mounting member f through the stay j while the relative vibration between the engine and the vehicle body is absorbed by the elastic body d of the mount insulator g. The transmission is distributed to a position different from the position, thereby reducing vibration transmitted from the engine to the vehicle body, particularly engine noise.

[0003]

However, in the conventional engine mounting device a, since the stay j is substantially flat, the fixed end of the mount insulator g of the stay j on the outer cylinder b side is fixed to the outer cylinder. It is fixed via a bolt or the like in a state of being in line contact with the arc-shaped peripheral surface of b. For this reason, for example, in order to withstand a large force input from the pin portion h to the mount insulator g side at the time of a collision, sudden start, or running on a rough road, the mount insulator g
However, there is a disadvantage that the thickness of the mounting bracket f needs to be considerably thickened, and a reinforcing rib or the like needs to be provided, resulting in an increase in cost.

In this case, a plurality of stays j are used to form an outer cylinder b.
It is conceivable to secure the strength and rigidity on the mount insulator g side by connecting the outer periphery of the vehicle body member e with the vehicle body side member e. Since the work has to be performed according to the number of the stays j, the cost is eventually increased.

SUMMARY OF THE INVENTION The present invention has been made to solve such inconvenience, and a single stay can sufficiently secure the strength and rigidity of the mount insulator, thereby reducing the cost. It is an object of the present invention to provide an engine mounting device as described above.

[0006]

According to a first aspect of the present invention, there is provided an engine mount device, wherein an elastic body is interposed between an outer cylinder and an inner cylinder and is fixed to a vehicle body-side member. A mount insulator, an engine unit mounting portion having a pin portion inserted into the inner cylinder and fixed to the engine unit side, and an engine unit mounting portion interposed between an outer peripheral portion of the outer cylinder and the vehicle body-side member. And a stay for connecting the outer cylinder to the outer cylinder. A stationary end of the stay on the outer cylinder side is brought into contact with an outer peripheral surface of the outer cylinder in a circumferential direction.

The engine mounting device according to claim 2 is
In claim 1, a vertical level of a fixed end of the stay on the vehicle body-side member side is arranged close to an axial level of the pin portion.

[0008] The engine mount device according to claim 3 is:
In Claim 1 or 2, the length of the stay in the circumferential direction with respect to the outer peripheral surface of the outer cylinder is set to be in a range of at least 1/3 of the circumference of the outer cylinder.

The engine mount device according to claim 4 is
The fixing device according to any one of claims 1 to 3, wherein a fixed end of the stay on the outer cylinder side is arranged on a lower portion in a circumferential direction of the outer cylinder.

[0010] The engine mount device according to claim 5 is
The dynamic damper according to any one of claims 1 to 4, wherein a dynamic damper is attached to a side of the mount insulator separated from the engine unit.

[0011]

According to the first aspect of the present invention, the fixed end on the outer cylinder side of the stay comes into surface contact with the outer peripheral surface of the outer cylinder along the circumferential direction to provide sufficient strength and rigidity on the mount insulator side. Therefore, when a large force is input from the pin portion to the mount insulator side at the time of collision, sudden start, or running on a rough road, the load applied to the mounting bracket of the mount insulator can be significantly reduced. As a result, it is possible to reduce the thickness of the mounting bracket of the mount insulator, to simplify the structure by reducing the reinforcing ribs, etc., and to reduce the cost of the apparatus. .

According to the second aspect of the present invention, in addition to the first aspect of the present invention, the stationary end of the stay on the vehicle body side member is disposed close to the axial level of the pin portion, so that a large force is applied from the pin portion to the mount insulator side. Since the bending force and the torsional force input to the fixed end when the input is input can be suppressed, the fixed end on the outer cylinder side of the above-described stay comes into surface contact with the outer peripheral surface of the outer cylinder along the circumferential direction. In addition to providing sufficient strength and rigidity to the mount insulator side, the effect of further reducing the load on the mounting bracket of the mount insulator can be obtained.

According to a third aspect of the present invention, in addition to the first or second aspect, the length of contact of the stay with respect to the outer peripheral surface of the outer cylinder in the circumferential direction is at least 1/3 of the circumference of the outer cylinder. By doing so, sufficient strength and rigidity can be reliably provided to the mount insulator side.

According to a fourth aspect of the present invention, in addition to any one of the first to third aspects of the present invention, the stationary end of the stay on the outer cylinder side is disposed at a lower portion in the circumferential direction of the outer cylinder. Since the stay is disposed close to the mounting bracket of the mount insulator, the load applied to the mounting bracket can be further reduced. Further, since the stay is opened above, wiring of piping and harness in the engine room is performed. In this case, an effect is obtained that the stay can be kept out of the way.

According to a fifth aspect of the present invention, in addition to any one of the first to fourth aspects, a dynamic damper is mounted on a side of the mount insulator away from the engine unit, so that the dynamic damper can be mounted on a pin tip. The dynamic damper is arranged at a position where the amplitude of vibration is the largest on the side, so that the dynamic damper can function most effectively. As a result, an effect that a sufficient sound vibration reduction effect can be obtained can be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory side view for explaining an engine mounting apparatus according to an embodiment of the present invention, FIG. 2 is a partially cutaway view of FIG. FIG. 4 is a view as seen from the direction of arrow B in FIG. 1, FIG. 4 is a view as seen from the direction of arrow C in FIG. 1, and FIG. 5 is a cross-sectional view showing a state where a dynamic damper is attached to the tip of the pin. In the present embodiment, an engine mount device which is disposed between a power unit mounted on a vehicle and a vehicle body side member with an engine disposed on the right side in the vehicle width direction is taken as an example.

1 to 4, reference numeral 1 denotes an engine mount device disposed between the engine 2 and a vehicle body side member (body member) 3. An engine 2 having a mount insulator 7 fixed to the vehicle body side member 3 with a mount rubber (elastic body) 6 interposed between the inner cylinder 5 and a pin 8 inserted into the inner cylinder 5 Unit mounting portion 9 fixed to the outer peripheral portion of the outer cylinder 4 and the vehicle body side member 3
And a stay 10 interposed between the two to connect the two.

The mount insulator 7 includes a large-diameter cylindrical outer cylinder 4 and a small-diameter cylindrical inner cylinder 5 arranged concentrically inside the outer cylinder 4. The inner cylinder 5 has both ends in the axial direction projecting slightly from the outer cylinder 4, and a mount rubber 6 is interposed between the outer cylinder 4 and the inner cylinder 5 by vulcanization bonding. A mounting bracket 11 is fixed to a lower portion of the outer cylinder 4 in a circumferential direction, and the mounting bracket 11 is fixed to the vehicle body side member 3 by bolts 12.

The engine unit mounting portion 9 is formed in a substantially rectangular parallelepiped shape that is long in the front-rear direction of the vehicle. A right side surface of the rear end portion in the vehicle width direction is disposed to face an end of the inner cylinder 5 on the engine 2 side. I have. A pin portion 8 extending toward the vehicle body side member 3 is provided concentrically with the inner cylinder 5 on a right side surface of the rear end portion of the engine unit mounting portion 9 in the vehicle width direction. And is inserted into the inner cylinder 5 by press-fitting. A mounting bolt 1 is provided on a lower side surface of the front end of the engine unit mounting portion 9 in the vehicle height direction.
4 extends downward, and the mounting bolt 14
The engine unit mounting portion 9 is fixed to the right side portion of the engine 2 in the vehicle width direction via the.

The stay 10 is formed in a substantially triangular shape in plan view and extends rightward in the vehicle width direction from the outer cylinder 4 and has a base end (fixed end on the outer cylinder side) at the outer cylinder. The outer cylinder 4 has an arc surface corresponding to the outer peripheral surface thereof and is fixed by welding to a circumferentially lower portion of an outer peripheral surface of an end portion of the outer cylinder 4 on a side away from the engine 2. In the fixed state, the base end portion of the stay 10 is in contact with the outer peripheral surface of the outer cylinder 4 along the circumferential direction.
Sufficient strength and rigidity can be imparted to the side. Further, since the fixed end of the stay 10 on the side of the outer cylinder 4 has a curvature corresponding to the outer peripheral surface of the outer cylinder 4, the rigidity of the stay 10 itself can be increased.

Here, the contact length of the stay 10 in the circumferential direction with respect to the outer cylinder 4 is set to be in a range of at least 外 of the outer cylinder 4. If the number of turns is less than 1/3, sufficient strength and rigidity may not be provided to the mount insulator 7 in some cases.

The stay 10 extends obliquely upward from the lower portion of the outer cylinder 4 toward the right side in the vehicle width direction, and has a vertical end level (fixed end on the vehicle body side member side). The pin portion 8 is arranged at a position below the axial level and close to the axial level. A bolt insertion hole 1 is provided at the tip of the stay 10.
0a is formed, and the bolt insertion hole 10a is substantially concentrically opposed to a screw hole (not shown) formed at a position different from the mounting position of the mounting bracket 11 of the vehicle body side member 3. . Bolt 1 from bolt insertion hole 10a
6 is screwed into the screw hole of the vehicle body side member 3 so that the tip of the stay 10 is fixed, whereby the outer peripheral portion of the outer cylinder 4 and the vehicle body side member 3 are connected via the stay 10. You. And stay 1 like this
By fixing the distal end of the pin 0 close to the axial level of the pin 8, a large force is input from the pin 8 to the mount insulator 7 at the time of collision, sudden start, or running on a rough road, for example. When the input load is
The bending force and the torsional force input to the fixed end of the stay 10 on the vehicle body side member 3 side can be suppressed by firmly receiving the stay.

In the engine mounting apparatus 1 having such a structure, the relative vibration between the engine 2 and the vehicle body 3 is absorbed by the mount rubber 6 of the mount insulator 7, and the vibration of the engine 2 is transmitted through the stay 10 to the vehicle body side member. The transmission is distributed to a position different from the mounting position of the third mounting bracket 11, thereby reducing the vibration transmitted from the engine 2 to the vehicle body 3, especially the engine noise.

At this time, the fixed end of the stay 10 on the side of the outer cylinder 4 comes into surface contact with the outer peripheral surface of the outer cylinder 4 along the circumferential direction, so that the mount insulator 7 has sufficient strength and rigidity. Since the fixed end of the stay 10 on the side of the outer cylinder 4 is disposed on the lower side in the circumferential direction of the outer cylinder 4 in the same manner as the position of the mounting bracket 11 of the mount insulator 7, the stay 10 is used at the time of collision, sudden start, or running on a rough road. When a large force is input from the pin portion 8 to the mount insulator 7 side at the time or the like, the load applied to the mounting bracket 11 can be greatly reduced. As a result, the thickness of the mounting bracket 11 of the mount insulator 7 can be reduced. It is possible to make the device thinner, reduce the number of reinforcing ribs and the like, simplify the structure, and reduce the cost of the device 1.

The vehicle body side member 3 of the stay 10 is also provided.
Since the fixed end on the side is arranged close to the axis level of the pin portion 8, when a large force is input from the pin portion 8 to the mount insulator 7, the bending force and the torsional force input to the fixed end are suppressed. As a result, the fixed end of the stay 10 on the side of the outer cylinder 4 comes into surface contact with the outer peripheral surface of the outer cylinder 4 along the circumferential direction, so that sufficient strength and rigidity are imparted to the mount insulator 7 side. In addition, the load on the mounting bracket 11 of the mount insulator 7 can be further reduced.

Further, since the fixed end of the stay 10 on the side of the outer cylinder 4 is disposed on the lower side in the circumferential direction of the outer cylinder 4, the upper part of the stay 10 is opened, and as a result, the engine Stay 10 when arranging piping and harnesses in the room
Can be kept out of the way.

In the above embodiment, the base end of the stay 10 is fixed to the outer peripheral surface of the outer cylinder 4 by welding, and the tip end of the stay 10 is fixed to the vehicle body side member 3 with the bolt 16. However, this is not always necessary, and the base end and the distal end of the stay 10 may be fixed using other known fixing means.

In the above embodiment, the case where the base end of the stay 10 is fixed to the lower side in the circumferential direction of the outer cylinder 4 is taken as an example. However, the present invention is not limited to this. The part may be fixed to the upper part in the circumferential direction of the outer cylinder 4 or another part.

FIG. 5 shows a cylindrical dynamic damper 20 on the side of the mount insulator 7 remote from the engine 2.
It is a figure which shows the state which attached. In this cylindrical dynamic damper 20, a rubber 23 is interposed between an outer cylinder 21 and an inner cylinder 22 by vulcanization bonding, and a cylindrical mass 24 is externally fitted and fixed to the outer cylinder 21. A cylindrical mass 25 is internally fitted and fixed to the inner cylinder 22. An end face of the mass 25 facing the tip end of the pin portion 8 is formed on an end face of the inner cylinder 5 of the mount insulator 7 that is separated from the engine 2 in order to regulate the circumferential direction of the cylindrical dynamic damper 20. A projection 25a to be fitted into the recess 5a is formed.

The convex portion 25a of the mass 25 is connected to the concave portion 5a of the inner cylinder 5.
The bolt 25 inserted into the mass 25 is screwed into a screw hole 8 a formed in the tip end surface of the pin portion 8 to join the mass 25 and the end faces of the inner cylinder 5 concentrically. A cylindrical dynamic damper 20 is concentrically attached to the distal end surface of the portion 8.

When the cylindrical dynamic damper 20 is attached to the tip surface of the pin portion 8 as described above,
The relative vibration between the engine 2 and the vehicle body side 3 is absorbed by the mount rubber 6 of the mount insulator 7 and the cylindrical dynamic damper 20, and the vibration of the engine 2 is transmitted via the stay 10 to the mounting bracket 11 of the vehicle body side member 3. The transmission is distributed to a position different from the mounting position, whereby the vibration transmitted from the engine 2 to the vehicle body 3, particularly the engine noise, is reduced.

At this time, the cylindrical dynamic damper 20
Is mounted on the side of the mount insulator 7 away from the engine 2, that is, at the position where the amplitude of vibration is the largest on the tip end side of the pin portion 8, so that the cylindrical dynamic damper 20 can function most effectively. Moreover, since the mass 25 internally fitted and fixed to the inner cylinder 22 of the cylindrical dynamic damper 20 serves as a mass damper, a sufficient sound vibration reduction effect can be obtained.

The cylindrical dynamic damper 20
Can be attached even if the stay 10 is arranged on the upper or lower part of the outer cylinder 4 in the circumferential direction. However, the stay 10 is arranged on the lower part of the outer cylinder 4 in the circumferential direction. 10
Is opened, so that the cylindrical dynamic damper 20 can be easily attached.

[Brief description of the drawings]

FIG. 1 is an explanatory side view for explaining an engine mount device as an example of an embodiment of the present invention.

FIG. 2 is a partially cut-away view as viewed from the direction of arrow A in FIG. 1;

FIG. 3 is a diagram viewed from the direction of arrow B in FIG. 1;

FIG. 4 is a view as seen from a direction of an arrow C in FIG. 1;

FIG. 5 is a cross-sectional view showing a state in which a dynamic damper is attached to a pin tip.

FIG. 6 is an explanatory diagram for explaining a conventional engine mount device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine mount device 2 ... Engine 3 ... Body side member (body side member) 4 ... Outer cylinder 5 ... Inner cylinder 6 ... Mount rubber (elastic body) 7 ... Mount insulator 8 ... Pin part 9 ... Engine unit mounting part 10 … Stay 20… cylindrical dynamic damper

Claims (5)

[Claims] 1. A mount insulator having an elastic body interposed between an outer cylinder and an inner cylinder and fixed to a vehicle body-side member, and a pin portion inserted into the inner cylinder and provided on an engine unit side. An engine mount device comprising: an engine unit mounting portion to be fixed; and a stay interposed between an outer peripheral portion of the outer cylinder and the vehicle body-side member to connect the two to each other. An engine mount device wherein an end is brought into contact with an outer peripheral surface of the outer cylinder along a circumferential direction. 2. The engine mount device according to claim 1, wherein a vertical level of a fixed end of the stay on the vehicle body side member side is arranged close to an axial level of the pin portion. 3. The contact length of the stay in the circumferential direction with respect to the outer peripheral surface of the outer cylinder is at least １ ／ of the circumferential length of the outer cylinder.
3. The engine mount device according to claim 1, wherein the engine mount device has a circumferential range. 4. The engine mount device according to claim 1, wherein a fixed end of the stay on the outer cylinder side is disposed at a lower portion in a circumferential direction of the outer cylinder. . 5. The engine mounting device according to claim 1, wherein a dynamic damper is mounted on a side of the mount insulator that is separated from the engine unit.