JP2000356248A - Engine mount structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-weight and inexpensive engine mount structure while preventing the engine mount structure from being enlarged by projecting both sides of an outer elastic part with respect to both end surfaces of an outer cylinder, providing a side stopper with a covering part of an engine side-mount bracket end part, and forming a curved part. SOLUTION: A cylindrical part 52, upper and lower outer elastic parts 48-1, 2 projecting from both ends of the cylindrical part 52, and an inner elastic part 50 are integrally held in an outer cylinder 42, a connection bolt is inserted into an inner cylinder 40, and both ends of the inner cylinder 40 are mounted on a pair of car body side-mount parts 20 opposite to each other, of a car body side-mount bracket through side stoppers 56. Cover parts 58 for covering an end of an engine side-mount bracket 14 are mounted on the stoppers 56, curved parts 60 getting out of outer elastic parts 48 are formed for preventing the car body side-mount part 20 from being contacted with the bracket 14 even in large engine vibration. Whereby an axial length of a mount body can be reduced, and further as a stopper 56 does not have the shape of disc, the bracket 14 and the like can be prevented from being enlarged. Further by forming the curved parts 60, the weight can be reduced, and the cost can be also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine mount structure, and more particularly to an engine mount structure in which a mount body is provided between a vehicle body side mount bracket and an engine side mount bracket.

[0002]

2. Description of the Related Art In a vehicle, a mount body is provided between a vehicle-body-side mount bracket and an engine-side mount bracket so as to suppress the propagation of vibration during engine operation to the vehicle body. It has a mounting device to support. The mount body is provided with an elastic body made of rubber or the like provided between the inner cylinder and the outer cylinder, and both ends in the axial direction of the inner cylinder are provided on the vehicle body side mount bracket via side stoppers. The outer peripheral surface of the cylinder is fixed to the engine side mounting bracket.

[0003] Such a mounting structure is disclosed, for example, in Japanese Utility Model Laid-Open No. 2-148830.
In this publication, a disk-shaped side stopper is provided at both ends in the axial direction of an inner sleeve serving as an inner cylinder, and the end rubber is separated from the exhaust pipe by covering an end surface of the mount rubber with the side stopper. It was done.

[0004]

However, in the conventional mounting structure, in order to absorb a large vibration in the axial direction of the mount body, the mount body must be extended in the axial direction to have a large size. Since a large disk-shaped side stopper is disposed between the inner cylinder of the mount body and the vehicle body-side mount bracket, for example, the entire engine-side mount bracket is enlarged according to the size of the side stopper. There was an inconvenience that it was necessary. In addition, in the case of a model with large engine vibration, there is a portion where the rigidity of the stopper of the mount body is relatively low, so that the vehicle-mount-side mount bracket and the engine-side mount bracket come into contact with each other, thereby generating noise. was there.

[0005]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, the present invention provides a mount body having an elastic body interposed between an inner cylinder and an outer cylinder. In an engine mount structure in which both end sides of the elastic body are provided on the vehicle body side mount bracket via side stoppers and the outer cylinder is provided on the engine side mount bracket, the elastic body is provided with two gap portions penetrating in the axial direction with the inner cylinder. Forming an outer elastic portion outside the gap portion and an inner elastic portion attached to the inner cylinder inside the two gap portions, wherein the outer elastic portion and the inner elastic portion Are integrally provided by a cylindrical portion along the inner peripheral surface of the outer cylinder, and both ends in the axial direction of the outer elastic portion are provided so as to protrude beyond both end surfaces in the axial direction of the outer cylinder, and are provided on the side stopper. Is Characterized in that is provided with the engine-side mount bracket encapsulation portion covering the end portions of the formation of the curved portion so as to avoid the outer elastic portion.

[0006]

In the present invention, the axially opposite ends of the outer elastic portion are provided so as to protrude beyond the axially opposite end surfaces of the outer cylinder. The side stopper is provided with a wrapping part that covers the end part of the engine side mounting bracket and a curved part is formed to avoid the outer elastic part. As a result, the length of the mount body in the axial direction is reduced while preventing the abutment between the body-side mount bracket and the engine-side mount bracket, preventing the mount bracket and the like from becoming large. Since the curved portion is formed so as to avoid the elastic portion, the weight can be reduced and the cost can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 6 show a first embodiment of the present invention. 5 and 6, reference numeral 2 denotes an engine mounted on a vehicle (not shown), 4 denotes a cylinder block, 6 denotes a cylinder head, and 8 denotes a transmission connected to the engine 2.

The engine 2 is elastically supported on a vehicle body (not shown) by a mounting device 10. The mount device 10 includes a vehicle body-side mount bracket 12, an engine-side mount bracket 14, and a mount body 16.

The vehicle body-side mount bracket 12 is made of, for example, metal and has a pair of vehicle body-side mounting portions 20.
20. The vehicle body-side bracket body 18 has a plurality of vehicle body-side bolt holes 24 through which a plurality of vehicle body-side mounting bolts 22 to be mounted on a vehicle body frame (not shown) are inserted. The pair of body-side mounting portions 20 facing each other include:
Connection bolt holes 28, 28 through which the connection bolts 26 are inserted are formed. This connecting bolt 26 has a connecting nut 3
0 is screwed.

The engine-side mount bracket 14 is made of, for example, metal, and has an engine-side bracket body 32.
And an engine-side mounting portion 34 protruding toward the vehicle body frame. The engine-side bracket body 32 has a plurality of engine-side mounting bolts 3 mounted on the cylinder block 4.
6, a plurality of engine-side bolt holes 38 are formed.

The mount body 16 elastically connects the vehicle-side mount bracket 12 and the engine-side mount bracket 14 with a rubber, for example, between an inner cylinder 40 made of metal and an outer cylinder 42 made of metal. It is configured with an elastic body 44 made of a material or the like. The outer peripheral surface of the outer cylinder 42 is fixed to the engine-side mounting portion 34 of the engine-side mount bracket 14. The elastic body 44 includes
Two upper and lower gaps 46-1 and 46- penetrating in the axial direction
2 is formed in a layered manner with the inner cylinder 40 interposed therebetween, and upper and lower outer elastic portions 48-1 and 48-2 are provided on the outer side of the lower gap portions 46-1 and 46-2. Inside the upper and lower gap portions 46-1 and 46-2, an inner elastic portion 50 attached to the inner cylinder 40 is provided. Upper and lower outer elastic parts 4
8-1 and 48-2 and the inner elastic portion 50 are integrally provided by a tubular portion 52 along the inner peripheral surface of the outer tube 42.
As shown in FIG. 1, both ends of the outer elastic portion 48 have a length L1 longer than both end surfaces of the outer cylinder 42 having the same width W as the cylindrical portion 52.
Only in the axial direction. The upper and lower outer elastic portions 48-1 and 48-2 have a function as stoppers for engine vibration in the vertical direction, and the vehicle body-side mount bracket 12 and the engine-side mount bracket 14 do not abut under normal vibration. However, there are many restrictions on the shape depending on the space between the inner cylinder 40 and the outer cylinder 42, the state of action of the load, and the like. The mount body 16 has relatively low rigidity in the left-right direction since no stopper member exists. here,
The lower outer elastic portion 48-2 is loaded with the upper outer elastic portion 48-1.
The upper outer elastic portion 4
It is formed larger than 8-1.

As shown in FIGS. 1 and 2, an outer cylinder 42 is provided around the inner cylinder 40 on the inner cylinder 40 side of the inner elastic portion 50.
Side stopper mounting portions 54, 54 extending from the both end surfaces by a length L2 are provided. Side stoppers 56 are attached to both end sides of the inner cylinder 40 in the axial direction via the side stopper attaching portions 54. The side stopper 56 has an upper outer elastic portion 48-1 at a portion where the upper and lower outer elastic portions 48-1 and 48-2 do not exist at the end portion so as to cover the end portion of the engine-side mount bracket 14. And the other side enclosing portions 58-1, 58- protruding outward in the left-right direction between the lower and outer elastic portions 48-2.
2, and upper and lower curved portions 60-1 and 60-2 are formed so as to avoid the outer elastic portion 48. The side stopper 56 has an inner cylinder insertion hole 56A through which the inner cylinder 40 and the side stopper mounting portion 54 are inserted. The relationship between the width M1 of the outer elastic portion 48, the mounting surface width M2, and the width M3 of the side stopper 56 is M2−M1 <
2 · M3, but as described above, the side stopper 56
However, since it is formed not in a disk shape but in a specific shape, there is no danger of protruding from the mounting surface, and there is no need to extend the mounting surface width M2 in the axial direction.

In the mount body 16, the cylindrical portion 5
2 is provided to be held in an outer cylinder 42 attached to the engine-side mount bracket 14, and both end sides of the inner cylinder 40 are a pair of opposed body-side mount brackets 12 via side stoppers 56. Body side mounting part 20
The connection bolt 20 is attached to the connection cylinder 20 by a connection bolt 26 inserted into the inner cylinder 40 and a connection nut 30 screwed to the connection bolt 26.

Next, the operation of the first embodiment will be described.

In the mounting device 10, the tubular portion 52, the upper and lower outer elastic portions 48-1, 48-2, and the inner elastic portion 50
Are integrally held in the outer cylinder 42, the connecting bolt 26 is inserted into the inner cylinder 40, and both ends of the inner cylinder 40 are connected to the vehicle-side mounting bracket 12 via side stoppers 56. Pair of vehicle body side mounting portions 20 and 2 facing each other
At the position 0, the connection bolt 26 inserted into the inner cylinder 40 and the connection nut 30 screwed to the connection bolt 26 are attached.

In the first embodiment, since the outer elastic portion 48 of the elastic body 44 protrudes beyond the end surface of the outer cylinder 42, the outer elastic portion 48 restricts the translation of the mount body 16 in the axial direction. Thus, large vibrations in the axial direction can be absorbed to prevent rattling.

Further, since the side stopper 56 is provided with a wrapped portion 58 covering the end portion of the engine side mount bracket 14, and formed with a curved portion 60 so as to avoid the outer elastic portion 48, when the engine vibration is large, But
Since the body-side mount bracket 12 and the engine-side mount bracket 14 are prevented from contacting each other, the length of the mount body 16 in the axial direction is suppressed, and the side stopper 56 is not disk-shaped. 14 can be prevented from being enlarged.

Further, since the curved portion 60 is formed in the side stopper 56 so as to avoid the outer elastic portion 48, the weight can be reduced and the cost can be reduced.

Further, the side stopper 56 is provided on the inner elastic portion 5.
Since the side stopper 56 is adhered and mounted on the side stopper mounting portion 54 at the end portion of 0, rotation and parallel movement of the side stopper 56 can be prevented, and abrasion of the side stopper 56 can be prevented. .

[0020]

As apparent from the above detailed description, according to the present invention, two gaps penetrating in the axial direction are formed in the elastic body in a layered manner with the inner cylinder interposed therebetween, and at the outside of the gaps. An outer elastic portion is provided and an inner elastic portion attached to the inner cylinder is provided inside the two gap portions, and the outer elastic portion and the inner elastic portion are integrally formed by a cylindrical portion along the inner peripheral surface of the outer cylinder. The outer elastic portion is provided with both ends in the axial direction protruding from the both end surfaces in the axial direction of the outer cylinder, and the side stopper is provided with a covering portion for covering an end portion of the engine side mounting bracket and avoids the outer elastic portion. Since the curved portions are formed as described above, both ends in the axial direction of the outer elastic portion are provided so as to protrude from both end surfaces in the axial direction of the outer cylinder. Let me regulate
Since it is possible to absorb large vibration in the axial direction, the side stopper is provided with a wrapped part that covers the end part of the engine side mount bracket, and a curved part is formed so as to avoid the outer elastic part, While preventing the abutment between the body side mount bracket and the engine side mount bracket, the length of the mount body in the axial direction is reduced,
Since the mount bracket and the like are prevented from being enlarged, and the side stopper is formed with a curved portion so as to avoid the outer elastic portion, the weight can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the mount body taken along line 1-1 in FIG.

FIG. 2 is an enlarged view of a main part of the mounting device of FIG. 3;

FIG. 3 is a front view of the mounting device.

FIG. 4 is a cross-sectional view of the mounting device.

FIG. 5 is an assembly view of the mounting device.

FIG. 6 is an assembly view of a mounting device attached to the engine.

[Explanation of symbols]

 2 Engine 10 Mounting device 12 Body side mount bracket 14 Engine side mount bracket 16 Mount body 40 Inner cylinder 42 Outer cylinder 44 Elastic body 46 Void 48 Outer elastic part 50 Inner elastic part 52 Cylindrical part 56 Side stopper 58 Envelope 60 Curved part

Claims (2)

[Claims] 1. A mount body having an elastic body interposed between an inner cylinder and an outer cylinder is provided, and both ends in the axial direction of the inner cylinder are provided on a vehicle body-side mount bracket via side stoppers,
In the engine mount structure in which the outer cylinder is provided on an engine-side mount bracket, two gaps penetrating in the axial direction are formed in the elastic body in a layered manner with the inner cylinder interposed therebetween, and an outer elastic section is formed outside the gap. And an inner elastic portion attached to the inner cylinder is provided inside the two gaps, and the outer elastic portion and the inner elastic portion are integrated by a cylindrical portion along the inner peripheral surface of the outer cylinder. Provided,
Both ends in the axial direction of the outer elastic portion are provided so as to protrude beyond both end surfaces in the axial direction of the outer cylinder, and the side stopper is provided with a covering portion for covering an end portion of the engine-side mount bracket, and the outer elastic member is provided. An engine mount structure wherein a curved portion is formed so as to avoid the portion. 2. A side stopper mounting portion extending in the axial direction is provided at a portion around the inner cylinder on the inner cylinder side of the inner elastic portion attached to the inner cylinder so as to mount the side stopper. The engine mount structure according to claim 1, wherein: