JP2005249063A - Engine mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine mount capable of obtaining excellent stopper characteristic when bounding and capable of optimally tuning a rebound stopper rubber in response to a required characteristic. <P>SOLUTION: The engine mount 10 has an outer member 12, an inner member 14 and a main body rubber 16 for connecting them. The inner member 14 is provided with an outer flange part 38 directed outward in the radial direction, and a rebound stopper rubber 40 is fixed to a surface of a bracket 32 opposite to an inner flange part 34, and a side stopper rubber 42 is fixed to a side surface of the engine mount 10. The outer flange part 38 of the inner member 14 is separately structured from an inner member main body 52, and the rebound stopper rubber 40 and the side stopper rubber 32 are separately structured from the main body rubber 16 and fixed to the outer flange part 38. The outer flange part 38 is pressed into the inner member main body 52 in the axial direction for fixation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an engine mount, and more particularly to an engine mount in which a rebound stopper rubber is fixedly formed on an axially outer surface of a radially outward outer flange portion of an inner member, and a side stopper rubber is fixedly formed on a side surface.

  Conventionally, as a kind of engine mount, it has a rigid outer member, a rigid inner member, and a main body rubber that connects the outer member and the inner member, and the inner member has a rigid bracket fixed to the outer member. An outer flange portion that is radially outward in the inner space and that is axially opposed to the radially inward inner flange portion of the bracket is provided on the surface of the outer flange portion that faces the inner flange portion. An engine mount is used in which the rebound stopper rubber is fixed and the side stopper rubber is fixedly formed on the side surface.

FIG. 7 shows a specific example thereof.
In the figure, reference numeral 200 denotes an engine mount having a metal rigid outer member 202, a metal rigid inner member 204, and a main body rubber 206 for connecting them.
Reference numerals 207, 208, and 210 are metal and rigid brackets on the vehicle body side that are fixed to the outer member 202.
In the upper bracket 210 in the drawing, a radially inward inner flange portion 212 is integrally formed at the upper end.

The inner member 204 is integrally formed with an outer flange portion 216 that is radially outward in the inner space 214 of the bracket 210, and the upper surface of the outer flange portion 216 in the drawing, that is, the inner flange portion of the bracket 210. A rebound stopper rubber 218 is molded on the upper surface facing 212, and a side stopper rubber 220 is molded integrally with the main body rubber 206 on the side surface.
The outer flange portion 216 has a circular or elliptical shape, and the rebound stopper rubber 218 and the side stopper rubber 220 are also fixedly formed to the outer flange portion 216 in a circular or elliptical shape over the entire circumference.
Similarly, the main rubber 206 is also formed in an annular shape over the entire circumference of the inner member 204.

  A bracket 222 on the engine side is fastened and fixed to the inner member 204 by screwing a fastening bolt 226 into the female screw hole 224 at the center of the inner member 204.

In this kind of engine mount 200, the inner member 204 is conventionally formed by forging, and the outer flange portion 216 is also integrally formed by forging at that time.
Therefore, it is difficult to form the outer flange portion 216 so as to extend outward in the radial direction. This is because if the amount of extension is increased, forging cracks occur.

As a result, it is difficult to increase the lap (overlap) dimension L in the axial direction between the outer flange portion 216 of the inner member 204 and the inner flange portion 212 of the bracket 210.
If the lap allowance L between the outer flange portion 216 and the inner flange portion 212 is small, the stopper action of the bound stopper 218 that is sandwiched between them and acts as a stopper becomes weak, and the durability of the rebound stopper rubber 218 is also obtained. Will fall.

As a solution to this problem, it is conceivable to increase the hardness of the rebound stopper rubber 218. However, since the rebound stopper rubber 218 is formed integrally with the main body rubber 206 together with the side stopper rubber 220, it is required for the main body rubber 206. The rebound stopper rubber 218 cannot be made of a hard rubber material by itself because of the characteristics.
Further, the rebound stopper rubber 218 has a function of reducing noise such as a booming noise by vibration insulation. In this sense, the rebound stopper rubber 218 is preferably soft.

  The rebound stopper rubber 218 is required to have both of these contradictory characteristics, and in order to tune the characteristics optimally, it is necessary to select an appropriate rubber material. However, in the engine mount 200 of the form shown in FIG. However, since the rebound stopper rubber 218 is integrally formed with the main body rubber 206, it is not possible to select a free material. Therefore, there is a problem that it is difficult to tune the characteristic to an optimum characteristic.

In addition, there exists what was disclosed by the following patent document 1 as a prior art relevant to this invention.
Patent Document 1 discloses an invention relating to a fluid-filled vibration isolator, and discloses that an inner member is divided into two members.
However, the one disclosed in Patent Document 1 is different from the present invention because the flange portion is formed integrally with the shaft portion of the inner member.

JP 2003-184943 A

  In view of the above circumstances, the present invention has an object to provide an engine mount capable of obtaining good stopper characteristics at the time of bounding and optimally tuning the characteristics of a rebound stopper rubber according to required characteristics. It was made as.

  Accordingly, the present invention comprises (a) a rigid outer member, (b) a rigid inner member, and (c) a main body rubber for connecting the outer member and the inner member. The member is provided with an outer flange portion that is radially outward in an inner space of a rigid bracket fixed to the outer member, and that is axially opposed to the radially inward inner flange portion of the bracket. In addition, in the engine mount in which a rebound stopper rubber is fixed to a surface of the outer flange portion facing the inner flange portion and a side stopper rubber is fixed to a side surface, the outer flange portion of the inner member is connected to the inner flange. It is configured separately from the member main body, and the rebound stopper rubber and the side stopper rubber are configured separately from the main body rubber to be fixedly formed on the outer flange portion, The outer flange portion, wherein the fixed press fitted in the axial direction on the inner member body.

  According to a second aspect of the present invention, (a) a rigid outer member, (b) a rigid inner member in which a female screw hole for bolt screwing is formed at the center, and (c) the outer member and the inner member. The inner member has a radially outward direction in the inner space of the rigid bracket fixed to the outer member, and the inner member has a shaft with respect to the radially inward inner flange portion of the bracket. An engine mount having an outer flange portion facing in a direction, a rebound stopper rubber fixed to a surface of the outer flange portion facing the inner flange portion, and a side stopper rubber fixed to a side surface. The outer flange portion of the inner member is configured separately from the inner member main body to form a bolt insertion hole at the center, and the rebound stopper rubber and side Fastening for fastening and fixing the bracket on the engine side in a state where the upper rubber is formed separately from the main rubber and is fixed to the outer flange, and the outer flange is overlapped with the inner member main body in the axial direction. The bolt is inserted into the bolt insertion hole of the outer flange portion and screwed into the female screw hole of the inner member main body, and the outer flange portion and the inner member main body are integrally coupled with the engine side bracket by the fastening bolt. It is characterized by that.

  According to a third aspect of the present invention, in any one of the first and second aspects, a first liquid chamber and a second liquid chamber are formed on the lower side of the main rubber, and they are communicated with each other through an orifice passage. The liquid chamber is filled with a liquid.

Effects and effects of the invention

  As described above, according to the present invention, the outer flange portion of the inner member is configured separately from the inner member main body, and the rebound stopper rubber and the side stopper rubber are configured separately from the main body rubber, and these rebound stopper rubbers are formed. In addition, the inner stopper rubber is fixedly formed on the outer flange portion, and the outer flange portion is fixed to the inner member main body by press-fitting in the axial direction.

According to the present invention, the outer flange portion can be formed to have a large diameter, and the axial lapping margin L between the outer flange portion and the inner flange portion of the bracket can be increased.
This makes it possible to increase the contact area of the rebound stopper rubber sandwiched between the outer flange portion and the inner flange portion of the bracket with respect to the inner flange portion, thereby improving the stopper characteristics of the rebound stopper rubber. The durability can be increased.

  In addition, since the rebound stopper rubber is molded separately from the main rubber together with the side stopper rubber in the present invention, the restriction due to the main rubber is removed, and the degree of freedom in selecting the rubber material of the rebound stopper rubber is increased. The range of tuning of the characteristics of the rebound stopper rubber and the side stopper rubber is widened, and it is possible to impart optimum characteristics to the rebound stopper rubber and the side stopper rubber.

  On the other hand, according to the second aspect of the present invention, the outer flange portion of the inner member is configured separately from the inner member main body, and the engine side relative to the inner member main body is fastened by a fastening bolt for fastening the bracket on the engine side and the inner member. In this case, the same effect as in the first aspect can be obtained.

  The present invention can be suitably applied to a liquid seal engine mount having a first liquid chamber, a second liquid chamber, and an orifice for communicating them under the main rubber (Claim 3). .

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an engine mount of the present embodiment, which is a cylindrical metal outer member 12 having a cylindrical shape, a metal inner member 14 having a circular cross section, and a main body rubber 16 for connecting them. And have.
Here, the main body rubber 16 has a cross-sectional shape opened downward in a letter C shape, and is formed in an annular shape around the inner member 14.

A first liquid chamber 18 and a second liquid chamber 20 are formed below the main rubber 16 and are partitioned by a partition member 22.
Liquid is sealed in the first liquid chamber 18 and the second liquid chamber 20, and the liquid in the first liquid chamber 18 and the second liquid chamber 20 is formed along the outer periphery of the partition member 22. It is possible to move from the first liquid chamber 18 to the second liquid chamber 20 or vice versa through the passage 24.
In the engine mount 10 of this embodiment, a vibration damping action is performed based on the flow of the liquid in the liquid chamber.
Reference numeral 26 denotes a rubber-made flexible diaphragm, and the second liquid chamber 20 is formed inside the diaphragm 26.

28, 30 and 32 are metal rigid brackets on the vehicle body side fixed to the outer member 12. Of these, the upper bracket 32 is formed with a radially inward inner flange portion 34 at the upper end.
In the inner space 36 of the bracket 32, the inner member 14 is provided with an outer flange portion 38 that is radially outward.
A rebound stopper rubber 40 is fixedly formed on the upper surface of the outer flange portion 32, that is, a surface facing the inner flange portion 34, and a side stopper rubber 42 is fixedly formed on the side surface thereof.

The flange portion 38 has a circular or elliptical planar shape, and the rebound stopper rubber 40 and the side stopper rubber 42 are formed in an annular shape along the outer flange portion 38.
Here, the rebound stopper rubber 40 abuts against the inner flange portion 34 of the bracket 32 when the engine rebounds, that is, when the inner member 14 is displaced upward in the figure relative to the outer member 12, and acts as a stopper, that is, displacement restriction. It works.
Further, the side stopper rubber 42 abuts against the side surface of the bracket 32 to perform a stopper action when the inner member 14 is relatively displaced with respect to the outer member 12 in the left-right direction or the front-rear direction of the vehicle.

  Reference numeral 44 denotes an engine side bracket, which is fastened and fixed to the inner member 14 by screwing a fastening bolt 48 into a female screw hole 46 formed at the center of the inner member 14.

  1 and 2, reference numeral 50 denotes a caulking portion formed at the lower end portion of the bracket 32. The caulking portion 50 fixes the bracket 32 to the outer member 12 and the bracket 30 and integrally couples them. Yes.

In the present embodiment, as shown in FIG. 2, the outer flange portion 38 of the inner member 14 is configured separately from the inner member main body 52.
In addition, the rebound stopper rubber 40 and the side stopper rubber 42 are formed separately from the main rubber 16 as shown in FIG.
The rebound stopper rubber 40 and the side stopper rubber 42 are fixedly formed on the upper surface and the side surface of the flange portion 38, respectively.
However, in this embodiment, the rebound stopper rubber 40 and the side stopper rubber 42 are integrally formed.

  In the present embodiment, the outer flange portion 38 configured separately from the inner member main body 52 in this manner is press-fitted and fixed in the axial direction with respect to the inner member main body 52, and is thus assembled to the inner member main body 52. ing.

According to the present embodiment as described above, the outer flange portion 38 can be formed with a large diameter, and the axial lapping margin L between the outer flange portion 38 and the inner flange portion 34 of the bracket 32 is shown in FIG. As shown, it can be taken large.
As a result, the contact area of the rebound stopper rubber 40 sandwiched between the outer flange portion 38 and the inner flange portion 34 of the bracket 32 with respect to the inner flange portion 34 can be increased, and the stopper characteristics of the rebound stopper rubber 40 can be improved. It is possible to enhance the durability.

  In addition, since the rebound stopper rubber 40 is molded separately from the main body rubber 16 together with the side stopper rubber 42, the restriction by the main body rubber 16 is removed, and the degree of freedom in selecting the rubber material of the rebound stopper rubber 40 is increased. Further, the range of tuning of the characteristics of the rebound stopper rubber 40 and the side stopper rubber 42 is widened, and it becomes possible to impart optimum characteristics to the rebound stopper rubber 40 and the side stopper rubber 42.

5 and 6 show another embodiment of the present invention.
As shown in these drawings, in this embodiment, the outer flange portion 38 is integrally provided with a cylindrical portion 54, a bolt insertion hole 56 is formed at the center thereof, and the engine-side bracket 44 is fastened and fixed. In this case, the outer flange portion 38 is overlapped on the inner member main body 52, and the fastening bolt 48 is inserted into the bolt insertion hole 56 of the outer flange portion 38 and screwed into the female screw hole 46 of the inner member main body 52. This is an example in which the outer flange portion 38 is simultaneously fastened and fixed to the inner member main body 52 when the bracket 44 is fastened and fixed.
Other points are the same as in the above embodiment.

Also in the present embodiment, the contact area of the rebound stopper rubber 40 with the inner flange portion 34 can be increased, and the stopper characteristics of the rebound stopper rubber 40 can be enhanced and the durability can be enhanced.
Further, since the range of tuning of the rubber characteristics is widened, it is possible to impart optimum characteristics to the rebound stopper rubber 40 and the side stopper rubber 42.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

It is a figure of the engine mount of one Embodiment of this invention. It is sectional drawing which decomposes | disassembles and shows the principal part of FIG. It is a perspective view which decomposes | disassembles and shows the principal part of FIG. It is the elements on larger scale of the principal part of FIG. It is a figure which shows other embodiment of this invention. It is an exploded view of the principal part of FIG. It is a figure of an example of the conventional engine mount.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine mount 12 Outer member 14 Inner member 16 Main body rubber 18 1st liquid chamber 20 2nd liquid chamber 24 Orifice passage 28, 30, 32, 44 Bracket 34 Inner flange part 38 Outer flange part 40 Rebound stopper rubber 42 Side stopper rubber 46 Female thread hole 48 Fastening bolt 52 Inner member body 56 Bolt insertion hole

Claims (3)

(B) a rigid outer member, (b) a rigid inner member, and (c) a main body rubber that couples the outer member and the inner member. The inner member is fixed to the outer member. An outer flange portion that is radially outward in the inner space of the rigid bracket and that is axially opposed to the radially inward inner flange portion of the bracket is provided. In the engine mount in which the rebound stopper rubber is fixed on the surface facing the flange portion, and the side stopper rubber is fixedly formed on the side surface,
The outer flange portion of the inner member is configured separately from the inner member main body, and the rebound stopper rubber and the side stopper rubber are configured separately from the main body rubber and fixed to the outer flange portion. An engine mount characterized in that a flange portion is axially pressed into and fixed to the inner member main body. (B) a rigid outer member, (b) a rigid inner member in which a female screw hole for bolt screwing is formed in the center, and (c) a main body rubber that connects the outer member and the inner member. The inner member has an outer flange portion that is radially outward in the inner space of the rigid bracket fixed to the outer member, and that is axially opposed to the radially inward inner flange portion of the bracket. In the engine mount, the rebound stopper rubber is fixed to the surface of the outer flange portion facing the inner flange portion, and the side stopper rubber is fixed to the side surface.
The outer flange portion of the inner member is configured separately from the inner member main body to form a bolt insertion hole at the center, and the rebound stopper rubber and the side stopper rubber are configured separately from the main body rubber, The fastening bolt for fastening and fixing the bracket on the engine side is inserted into the bolt insertion hole of the outer flange portion in a state where the outer flange portion is fixedly formed on the outer flange portion and the outer flange portion is overlapped with the inner member body in the axial direction. An engine mount characterized by being screwed into a female screw hole of the inner member main body and integrally connecting the outer flange portion and the inner member main body together with the bracket on the engine side with the fastening bolt.   In any one of Claim 1, 2, the 1st liquid chamber and the 2nd liquid chamber are formed in the lower side of the said main body rubber | gum, They are connected by the orifice channel | path, A liquid is contained in these liquid chambers. Engine mount characterized by being enclosed.

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